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Can radius be configured to assign ip addresses?

I would need to know if a radius server can be configured in such a way that it allows to assign a specific ip address to a device when it connects. I mean, when a mobile device connects to the wifi network issued by an access point and authenticates through raidus, once that authentication has been successful, give the device a specific ip.

If it is possible, how can I make this configuration? by using a pool of ips?

user3105's user avatar

2 Answers 2

Generally not unless your wireless access point or wireless lan controller runs a local DHCP server where it pre-populates lease information from Access-Accept packets.

If your WAP/WLC does support this you'll be able to assign addresses by adding the Framed-IP-Address and/or Framed-IPv6-Address attributes to an Access-Accept.

The sqlippool module in FreeRADIUS v3 will be able to do assignments from a pool.

Just to mention... FreeRADIUS v3 supports DHCPv4 natively, and FreeRADIUS v4 supports DHCPv4 and DHCPv6.

Arran Cudbard-Bell's user avatar

DHCP bind MAC address might help. You can bind a specific MAC address of your device to a specific IP address.

Tu Nguyen's user avatar

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assign ip address via radius

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TheITBros

How to Configure RADIUS (NPS) Server on Windows Server

RADIUS (Remote Authentication in Dial-In User Service) is a network protocol that provides centralized management of authentication, authorization, and accounting (AAA), and designed to exchange of information between a central platform and client devices. RADIUS server can communicate with a central server for example, Active Directory domain controller) to authenticate remote dial-in clients and authorize them to access specific network services or resources.

The Network Policy Server (NPS) role implements the RADIUS server function in the Windows environment and allows you to authenticate remote clients against Active Directory. In this article, we’ll show how to configure a RADIUS server on Windows Server 2022/2019/2016, and how to configure RADIUS authentication on Cisco and MikroTic network devices (RADIUS clients) under AD user accounts.

Installing Network Policy Server (RADIUS) on Windows Server

Windows Server with the NPS (RADIUS) role forwards connecting user authentication requests to Active Directory domain controller, which performs user authentication. Therefore, the presence of an on-premises Active Directory is a mandatory requirement before the start of an NPS deployment.

Now you can to install the RADIUS server role on your Windows Server 2022/2019/2016. Open the Server Manager console, run the Add Roles and Features wizard > select the Network Policy and Access Services role.

Note . Also, you can install NPS role and management tools from an elevated PowerShell console: Install-WindowsFeature NPAS –IncludeManagementTools

Check if the NPAS role is installed on your Windows Server host:

radius server windows

After the role installation is completed, open the Network Policy Server (nps.msc) in the Tools menu.

windows radius server

Right-click on a root node of the NPS console and click Register server in Active Directory .

windows server radius

Confirm the new NPS server registration in Active Directory.

configure nps for radius authentication

Also, you can register your NPS server in Active Directory with a command:

The AD machine account on the NPS server is given permission to read the properties Active Directory user accounts to authenticate users. Your NPS host computer account will be added to the built-in domain group RAS and IAS Servers .

windows server 2022 radius setup

Next, create a new security group in the Active Directory domain (for example, RemoteCiscoUsers ) and add all users who will be allowed to authenticate on Cisco routers and switches to this group.

radius windows server

The next step is to add the Radius client. Radius client is the device from which your server can receive authentication requests. This could be a Cisco router, switch, Wi-Fi access point, etc.

Expand the RADIUS Clients and Servers > RADIUS Clients, select New .

windows server radius setup

On the Settings tab, fill the fields Friendly name , client Address (you can specify IP address or DNS name), and Shared Secret + Confirm shared password (you will use this password in the configuration of the Cisco switch/router).

Note . The shared secret password is rarely used in large corporate networks due to the problems with the distribution of shared secrets. It is recommended to use certificates instead of shared passwords. If you have a corporate Certification Authority (CA) deployed to implement PKI infrastructure, you can request a *.p12 certificate for the Radius/NPS server. Just import the certificate to the personal certification store of the Local Machine.

radius server configuration step by step

In the Advanced tab, select Vendor name – Cisco .

windows radius server setup

You can use the PowerShell command instead of the NPS GUI to add a new RADIUS client. In this case, you can use the New-NpsRadiusClient PowerShell cmdlet:

Note . On Windows Server Datacenter edition you can add RADIUS clients to NPS by IP address range. This allows to add a large number of RADIUS clients (such as wireless access points) rather than adding them individually. You can specify the IP range using the format 10.1.0.0/22 .

By default, NPS uses the following UDP ports to send and receive RADIUS traffic: 1812, 1813, 1645, and 1646. When you install the NPS role on Windows Server, rules for these ports are automatically created and enabled in Windows Defender Firewall. You can list these Windows Firewall rules using PowerShell:

If your RADIUS client is located in a DMZ network or an external security perimeter, you must create the appropriate firewall rules on your network firewall.

Configure NPS Policies on the RADIUS Server

NPS policies allow you to authenticate remote users and grant them access permissions configured in the NPS role. NPS access policies allow you to associate the RADIUS client to the domain security group that determines the user privileges on CISCO devices.

There are two types of policy on a RADIUS server:

  • Connection request policies — determine which RADIUS servers should authenticate and authorize connection requests received from RADIUS clients;
  • Network policies — allow you to specify who is authorized to connect to your network and a list of assigned privileges.

In our case, we will use only the NPS Network policies. Expand the Policies > Network Policies branch and select New :

windows radius

Specify the Policy name, the type of network access server should remain unchanged (Unspecified).

how to configure radius server in windows server step by step

In the Specify conditions step, you need to add the conditions under which this RADIUS policy will be applied. Let’s add two conditions — the authorized user must be a member of a specific domain security group, and the device you want to access has a specific name . Use the Add option to create a new condition by selecting the Windows Group type (add the RemoteCiscoUsers group) and specifying the Client Friendly Name (Cisco_*).

Note . The Client Friendly Name field may differ from the DNS name of your device. We will need it in the further steps to identify a specific network device when creating a Remote Access Policy. For example, you can use this name to specify a mask through which several different RADIUS clients are processed by a single access policy.

setup radius server 2022

On the next screen, select Access Granted .

configure radius server

My Cisco switch only supports Unencrypted authentication methods (PAP, SPAP), so I’ve disabled all other options.

radius server on domain controller

Skip the next configuration Constraints step.

In the Configure Settings section, go to the RADIUS Attributes > Standard section. Delete the existing attributes there and click the Add button.

Select Access type > All , then Service-Type > Add . Specify Others = Login .

radius server configuration

Now add a new attribute in the RADIUS Attributes > Vendor Specific section. Under Vendor, select Cisco, and click Add. Here you need to add information about the attribute. Click Add and specify the following value:

This value means that the user authorized by this policy will be granted a maximum (15) administrative access privileges on the Cisco device.

setup radius server

The last screen displays all selected NPS policy settings. Click Finish.

radius windows

If you have created several network policies in the NPS console, please note that they are processed from top to bottom, so the order of the policies is important. Further processing will stop if all conditions in the next policy are met. You can change the priority of policies in the NPS console using the Processing Order value.

how to configure radius server

By default, all AD accounts can be used to authenticate using RADIUS. You can check this using the Active Directory Users and Computers snap-in (dsa.msc). Open any user properties, go to the Dial-In tab, and check that the Control access through NPS Network Policy option in enabled in the Network Access Permission section.

radius server windows 2019

Or you can reset msNPAllowDialin attribute for all users in the specific Active Directory OU  using the LDAP filter:

Configuring RADIUS Authentication on Cisco Devices

Once you have created the NFS policy, you can proceed to configure your Cisco routers or switches for authentication on the newly installed RADUIS server.

As it is insecure to send unencrypted user credentials over the network, you should disable the Telnet protocol on your Cisco devices. To disable Telnet and enable SSH, use the following commands in Configuration Mode on the Cisco device:

You should create a local user on your Cisco device to avoid losing access to it if the RADIUS server or AD is unavailable. Create a local user with the following command:

To make the use of SSH mandatory and disable remote access using Telnet, execute the following commands:

Below is an example of the configuration for authorizing a Radius server for the Cisco Catalyst Switch:

If you have several Radius servers, add them to the group:

This completes the minimum switch configuration and you can try to check Radius authentication on your Cisco device.

How to Enable MikroTik (RouterOS) User Authentication via RADIUS

In this part, we will show you how to configure RADIUS authentication for VPN user connections on a MikroTik router (RouterOS based).

Open the Network Policy Server console (nps.msc) and create a new Radius client.

Select New RADIUS Client and configure the following settings:

  • Enable this RADIUS Client;
  • Friendly Name — enter the name of your MikroTik router;
  • Address — specific the IP address of the MikroTik router;
  • Specify your Pre-shared secret key.

windows radius server configuration

Create a new Network Policy with the following settings:

  • User Groups — specify the name of the domain user group that is allowed to authenticate on your MikroTik router;
  • Authentication Type — MS-CHAPv2;
  • Tunnel Type — Point-to-Point Tunneling Protocol (PPTP);
  • Access Permissions — Access granted;
  • In the Configure Authentication Methods window, leave only MS-CHAPv2 and allow users to change expired passwords ( User can change password after it has expired option);
  • Multilink and Bandwidth Allocation Protocol (BAP) – Do not allow Multilink connections;
  • In the Standard section, remove Service-Type – Framed and leave only Framed-Protocol PPP ;
  • Encryptions — leave only the strongest encryption (MPP 128-bit) method.

radius server windows server

Once you have created a new policy, open the Network Policy Server settings.

Leave only the following UDP ports for the RADIUS server communications:

  • Authentication — 1812;
  • Accounting — 1813.

radius server on windows

Check if these UDP ports are open in Microsoft Defender Firewall Rules. If not, open them manually.

Now you need to configure the connection settings for Windows Server RADIUS in the MikroTik configuration (we assume that PPP VPN Server is already configured on RouterOS).

Check in the PPTP server settings that only mschap2 is allowed to use for authentication.

configure radius server with active directory

Now we need to configure the connection to Radius NPS server. Select New Radius Server and specify the following options:

  • Service: ppp;
  • Address: IP address of the RADIUS server;
  • Secret: pre-shared key that you specified in the network policy settings;
  • Src/ Address: MikroTik IP address from which traffic will be sent to NPS;
  • Authentication Port: 1812;
  • Accounting Port: 1813.

radius server setup

Add appropriate access rules to MikroTik Firewall.

Then go to Secrets > PPP Authentication and Accounting and enable the Use Radius option.

radius on windows server

It remains to configure a PPTP VPN connection to your MikroTik VPN on users’ computers. Users can use their Active Directory account credentials to authenticate against Mikrotik (accounts must be added to the AD group that you have specified when creating the MiktoTik Network Policy on NPS).

How to View the NPS/RADIUS Event Logs on Windows?

To enable NPS Server Radius Authentication logging, you need to enable the Network Policy Server audit policy via the local Group Policy Editor (gpedit.msc). Go to Computer Configuration > Policies > Windows Settings > Security Settings > Advanced Audit Policy Configuration > Audit Policies > Logon/Logoff > Audit Network Policy Server and check the option to audit both success and failure logon attempts.

active directory radius server

Or you can enable this NPS audit policy with the following commands:

configure radius server windows

Now you can open the Event Viewer console (eventvwr.msc), go to the Windows Logs > Security, and filter the event by the Event ID 6272.

Network Policy Server granted access to a user.

how to setup a radius server

If the user has entered an incorrect password or is not authorized to log on through the RADIUS Client, Event ID 6272 is displayed:

Network Policy Server denied access to a user.

If the user has entered an incorrect user name and password, an event will be displayed in the Event Viewer:

Authentication failed due to a user credentials mismatch

If the user is not a member of the correct security group, or if Network Access Permission = Deny is set in the AD user properties on the Dial-in tab, the following event will occur:

The Network Access Permission setting in the dial-in properties of the user account in Active Directory is set to Deny access to the use

If a user enters an incorrect password multiple times, their account will be locked out in accordance with your Account Lockout Policy in AD .

Event ID: 6279 Network Policy Server locked the user account due to repeated failed authentication attempts.

If you need to find all NPS authorizations events for the specific user ( Richard.Doe in this example), use the next PowerShell script:

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How to Migrate DHCP Server to Another Windows Server Host

How to fix this dch driver package is not compatible nvidia error.

' src=

Kudos! Thank you for making the time to share a very well-written and informative Radius Server on Windows tutorial blog.

' src=

Please help me understand how to set up vpn reconnect, I have specific directive to configure vpn reconnect on Radius VPN server (server 2019), and I cannot find this information.

' src=

Please, now after configuring the RADIUS server, I need to setup my LAN, so that anyone who wishes to join the network, should first be authenticated against active directory.

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assign ip address via radius

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Cisco Meraki Documentation

Configuring RADIUS Authentication with WPA2-Enterprise

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Cisco Meraki MR access points (APs) offer a number of authentication methods for wireless association, including the use of external authentication servers to support WiFi Protected Access 2 - Enterprise (WPA2-Enterprise). This article outlines dashboard configuration to use a RADIUS server for WPA2-Enterprise authentication, RADIUS server requirements, and an example server configuration using Windows Network Policy Server (NPS).

For troubleshooting guidance, please refer to  RADIUS Issue Resolution Guide .

WPA2-Enterprise with 802.1X authentication can be used to authenticate users or computers in a domain. The supplicant (wireless client) authenticates against the RADIUS server (authentication server) using an Extensible Authentication Protocol (EAP) method configured on the RADIUS server. The gateway access point (authenticator) sends authentication messages between the supplicant and authentication server. This means the RADIUS server is responsible for authenticating users.

Access points perform Extensible Authentication Protocol Over LAN (EAPOL) exchanges between the supplicant and convert these to RADIUS Access-Requests messages, which are sent to the RADIUS server's IP address and UDP port specified in dashboard. Gateway access points need to receive a RADIUS Access-Accept message from the RADIUS server in order to grant the supplicant access to the network.

To achieve the best performance, we recommend placing the RADIUS server and gateway access points within the same layer-2 broadcast domain to avoid firewall, routing, or authentication delays. Keep in mind the access point is not responsible for authenticating wireless clients and acts as an intermediary between clients and the RADIUS server.

The following image provides a detailed breakdown of the Protected Extensible Authentication Protocol (PEAP) with the Microsoft Challenge Handshake Authentication Protocol version 2 (MSCHAPv2) association process:

Flow diagram showing frame exchange between supplicant (laptop), authenticator (access point) and authentication server (RADIUS server) for 802.1X EAP-PEAP with MSCHAPv2. The steps involve 802.11 association, EAP type proposal, TLS tunnel setup, TLS encrypted exchange, EAP success and 4-way handshake.

Supported RADIUS Attributes

When WPA2-Enterprise with 802.1X authentication is configured, the following attributes are present in the Access-Request messages sent from the Cisco Meraki access point to the customer's RADIUS server.

Note:  Please refer to RFC 2865  for details on these attributes, additional notes for certain attributes are included below.

  • NAS-IP-Address
  • Called-Station-ID : Contains (1) the Meraki access point's Basic Service Set Identifier (BSSID) (all caps, octets separated by hyphens) and (2) the Set Service Identifier (SSID) on which the wireless device is connecting. These 2 fields are separated by a colon. Example: "AA-BB-CC-DD-EE-FF:SSID_NAME".

Note:  BSSID MAC addresses will be different for each configured SSID. Additional information is available for  Calculating Cisco Meraki BSSID MAC Addresses  .

Note: SSIDs broadcasted by repeater access points in a mesh deployment can't use NAS-IP-Address attribute because repeater access points do not have IP addresses assigned. You can use NAS-ID attribute instead, which by default carries NODE_MAC:VAP_NUM.

  • Calling-Station-ID : Contains the MAC address of the wireless device (all caps, octets separated by hyphens). Example: "AA-BB-CC-DD-EE-FF".
  • NAS-Port-Type
  • Connect-Info
  • Meraki-Device-Name: Name of the Meraki device as configured in the dashboard 

The following attributes are honored by Cisco Meraki when received in an Access-Accept message from the customer's RADIUS server to the Cisco Meraki access point:

  • Tunnel-Private-Group-ID : Contains the VLAN ID that should be applied to a wireless user or device. (This can be configured to override VLAN settings that an administrator has configured for a particular SSID in the Cisco Meraki Cloud Controller.)
  • Tunnel-Type : Specifies the tunneling protocol. Example: VLAN.
  • Tunnel-Medium-Type : Sets the transport medium type used to create the tunnel. Example: 802 (which includes 802.11).
  • Filter-Id  /  Reply-Message  /  Airespace-ACL-Name  /  Aruba-User-Role : Any of these attributes can be used to convey a policy that should be applied to a wireless user or device. (Please ensure that the attribute type matches what is configured on the Network-wide > Configure > Group policies page in the Cisco Meraki Cloud Controller, and the attribute value matches the name of the  group policy configured on that page.)

RADIUS Configuration

The most common EAP configuration is PEAP with MSCHAPv2, which prompts users for credentials (either user or machine authentication).

Note:  Certificate-based authentication using EAP-TLS is also supported by the Meraki platform, but is outside the scope of this document. For more information, refer to the documentation on RADIUS: WPA2-Enterprise With EAP-TLS .

RADIUS Server Requirements

There are many server options available for RADIUS, which should work with MR access points if configured correctly. Please refer to your RADIUS server documentation for specifics, but the key requirements for WPA2-Enterprise with Meraki are as follows:

  • The server must host a certificate from a Certificate Authority (CA) trusted by clients on the network.
  • All gateway access points broadcasting the WPA2-Enterprise SSID must be configured as RADIUS clients/authenticators on the server with a shared secret.
  • The RADIUS server must have a user base to authenticate against.

Once the RADIUS server is configured, refer to the Dashboard Configuration section below for instructions on how to add your RADIUS server to dashboard.

User vs. Machine Authentication

The most common method of authentication with PEAP-MSCHAPv2 is user authentication, in which clients are prompted to enter their domain credentials. It is also possible to configure RADIUS for machine authentication, in which the computers themselves are authenticated against RADIUS, so the user doesn't need to provide any credentials to gain access. Typically, you can use EAP-TLS to configure machine authentication. However, some RADIUS server options make it simple to use PEAP-MSCHAPv2 to configure machine authentication (including Windows NPS, outlined in the example configuration below).

Note:  "Machine Authentication" is  not  the same as MAC-based authentication, which is another configuration option in dashboard under  Wireless > Configure > Access Control . Machine authentication, specifically, refers to devices authenticating against RADIUS.

Example RADIUS Configuration (Windows NPS + AD)

The following example configuration outlines how to set up Windows NPS as a RADIUS server, with Active Directory (AD) acting as a userbase:

  • Add the NPS role to Windows Server.
  • Add a trusted certificate to NPS.
  • Add APs as RADIUS clients on the NPS server.
  • Configure a policy in NPS to support PEAP-MSCHAPv2.
  • (Optional for machine auth) Deploy PEAP-MSCHAPv2 wireless network settings to domain member computers using Group Policy.

Add the NPS Role to Windows Server

Microsoft's RADIUS server offering for Windows Server 2008 and later is their NPS. Please refer to the following two Microsoft documents for instructions on adding the NPS role to Windows Server, and registering the new NPS server in Active Directory (allowing it to use AD as its userbase):

  • Install Network Policy Server (NPS )
  • Register the NPS server in Active Directory Domain Services

Add a Trusted Certificate to NPS

A RADIUS server must host a certificate that allows both network clients and Meraki access points to validate the server's identity. There are three options for this certificate:

  • Acquire a certificate from a trusted Certificate Authority As long as the CA used is trusted by clients on the network, a certificate can be purchased and uploaded to NPS to verify server identity (required by clients). Common examples of trusted CAs include GoDaddy and VeriSign.
  • Implement a Public Key Infrastructure (PKI) and generate a certificate (advanced) A PKI can be used on the network to issue certificates trusted by clients on the network. We recommend you have a strong understanding of PKI for this option.
  • Generate a self-signed certificate and turn off client server validation (insecure) You may generate a self-signed certificate for testing/lab purposes. However, clients will not trust a self-signed certificate and you will need to disable server validation to connect. We do not recommend this option for production deployment, due to dramatically reduced security.

Once a certificate is acquired, refer to the  Import a Certificate section of Microsoft's documentation for instructions on how to import a certificate.

Add Access points as RADIUS Clients on the NPS Server

In this scenario, access points communicate with clients and receive their domain credentials, which the access point then forwards to NPS. In order for the NPS to process an access point's RADIUS access-request message, you must first add the access point as a RADIUS client/authenticator by its IP address. Since only gateway access points have an IP address on the LAN, all gateway access points in the network must be added to NPS as RADIUS clients.

To quickly gather all gateway access point's LAN IP addresses, navigate to  Wireless > Monitor > Access points  in dashboard, ensure that the "LAN IP" column has been added to the table, and take note of all LAN IPs listed. Access points with a LAN IP of "N/A" are repeaters and they do not need to be added as RADIUS clients:

Access points page of the dashboard. The "Select columns" settings menu is open.

Once a list of gateway access point's LAN IPs has been gathered, please refer to Microsoft's documentation for instructions on adding each access point as a client in NPS . Take note of the shared secret configured in NPS, which is referenced in the dashboard.

Note:  To save time, entire subnets can also be added to NPS as RADIUS clients, and any requests coming from that subnet will be processed by NPS. This is only recommended if all access points are on their own management VLAN and subnet, to reduce security risks.

In many cases each RADIUS authenticator must be added to the RADIUS authentication server such as Microsoft NPS or Cisco ISE. For VPN concentration and concentrated Layer 3 roaming SSIDs, only concentrators would need to be added to the RADIUS authentication server.

Configure a Policy in NPS to Support PEAP-MSCHAPv2

NPS must be configured to support PEAP-MSCHAPv2 as its authentication method.

This is accomplished in three steps, outlined below for NPS in Windows Server 2008:

  • Create an NPS Policy
  • Change the Policy Process Order

Disable Auto Remediation

Creating an nps policy.

  • Open the Network Policy Server console.
  • Select NPS(Local), so you see the Getting Started pane.
  • Select RADIUS server for 802.1X Wireless or Wired Connections  in the  Standard Configuration drop down.
  • Click Configure 802.1X to begin the Configure 802.1X Wizard.
  • When the Select 802.1X Connections Type window appears select the radio button Secure Wireless Connections and type a Name: for your policy or use the default. Click Next .
  • Verify the access points you added as RADIUS clients on the Specify 802.1X switches window. Click Next .
  • For  Configure an Authentication Method select Microsoft: Protected EAP (PEAP) . 
  • Click Configure to review the Edit Protected EAP Properties . The server certificate should be in the Certificate issued drop down. Make sure Enable Fast Reconnect is checked and EAP type is Secure password (EAP-MSCHAPv2) . Click OK . Click Next .
  • When the Specify User Groups window appears click Add . 
  • Type or find the Domain Users group. This group should be located in the same domain as your RADIUS server. Note:  If RADIUS is being used for Machine Authentication, find the  Domain Computers  group instead.
  • When the group is added click OK . Click Next. 
  • Click Next  on Configure a Virtual LAN (VLAN) window.
  • When then Completing New IEEE 802.1X Secure Wired and Wireless Connections and RADIUS clients appears click Finish .

Change the Policy Process Order

  • Navigate to Policies>Connection Request Policies . Right click the wireless policy and Move Up so it is process first.
  • Navigate to Policies>Network Policies . Right click the wireless policy and  Move Up  so it is process first.
  • Navigate to Policies>Network Policies . Right click the wireless policy and select Properties .
  • On the Setting tab for the policy uncheck the box Enable auto-remediation of client computers and click OK .

The following image outlines an example of an NPS policy that supports user authentication with PEAP-MSCHAPv2:

NPS Secure Wireless Connections window and settings. The Authentication Method is EAP or MS-CHAPv1.

(Optional) Deploy a PEAP Wireless Profile using Group Policy

For a seamless user experience, it may be ideal to deploy a PEAP wireless profile to domain computers so users can easily associate with the SSID. Though optional for user auth, this is strongly recommended for machine authentication.

The following instructions explain how to push a PEAP wireless profile to domain computers using a GPO, on a Domain Controller running Windows Server 2008:

  • Open the domain  Group Policy Management  snap-in.
  • Create a new GPO or use an existing GPO.
  • Edit  the GPO and navigate to Computer Configuration > Policies > Windows Settings > Security Settings > Public Key Policies > Wireless Network (IEEE 801.X) Policies.
  • Right Click  Wireless Network (IEEE 801.X) Policies  and choose  Create a New Windows Vista Policy.
  • Provide a  Vista Policy Name.
  • Click  Add  for  Connect to available networks.
  • Choose  Infrastructure.
  • On the  Connection  tab, provide a  Profile Name  and enter the SSID of the wireless network for  Network Name(s).  Click  Add.
  • Authentication:  WPA2-Enterprise or WPA-Enterprise
  • Encryption:  AES or TKIP
  • Network Authentication Method:  Microsoft: Protected EAP (PEAP)
  • Authentication mode:  Computer Authentication (for machine auth)

NPS PEAP properties Security tab with settings from step 9 selected. Authentication has WPA2-enterprise EAP-PEAP with AES encryption is selected.

Click  Properties.

For  Trusted Root Certification Authorities  select the check box next to the appropriate Certificate Authorities and click  OK.

NPS Protected EAP Properties window with settings from step 11 selected.

Click  OK to  close out and click  Apply  on wireless policy page to save the settings .

Apply the GPO to the domain or OU containing the domain member computers (refer to Microsoft's  Deploying Group Policy documentation for details).

Dashboard Configuration

Once a RADIUS server has been set up with the appropriate requirements to support authentication, the following instructions explain how to configure an SSID to support WPA2-Enterprise, and authenticate against the RADIUS server:

  • In dashboard, navigate to Wireless >  Configure > Access control .
  • Select your desired SSID from the SSID drop down (or navigate to  Wireless > Configure > SSIDs  to create a new SSID first).
  • For Security  choose Enterprise with my RADIUS server .
  • Under RADIUS click Add server
  • Enter the following information in the table:
  • Host IP or FQDN* : IP address or FQDN of your RADIUS server, reachable from the access points.
  • Auth port : UDP port of the RADIUS server listens on for Access-Requests; 1812 by default.
  • Secret: RADIUS client shared secret

Updated UI Dashboard RADIUS servers table with configuration settings from step 5.

 6. Click the Save button.

*The network and all the access points must be running MR28.0+ to support FQDN.

Aside from the RADIUS server requirements outlined above, all authenticating access points will need to be able to contact the IP address and port specified in dashboard. Make sure that your access points all have network connectivity to the RADIUS server and no firewalls are preventing access.

VLAN Tagging Options

Dashboard offers a number of options to tag client traffic from a particular SSID with a specific VLAN tag. Most commonly, the SSID will be associated with a VLAN ID (see VLAN Tagging on MR Access Points ), so all client traffic from that SSID will be sent on that VLAN.

With RADIUS integration, a VLAN ID can be embedded within the RADIUS server's response. This allows for dynamic VLAN assignment based on the RADIUS server's configuration. Please refer to our documentation regarding Per-User VLAN tagging for configuration specifics.

Testing RADIUS from Dashboard

Dashboard has a built-in RADIUS test utility, to ensure that all access points (at least those broadcasting the SSID using RADIUS) can contact the RADIUS server:

  • Navigate to Wireless >  Configure > Access control .
  • Ensure that WPA2-Enterprise was already configured based on the  Dashboard Configuration section of this article.
  • Under RADIUS servers , click the Test  button for the desired server.
  • Enter the credentials of a user account in the Username  and Password  fields.
  • Click Begin test .
  • The window will show progress of testing from each access point in the network, and then present a summary of the results at the end. 
  • APs passed : Access points that were online and able to successfully authenticate using the credentials provided.
  • APs failed : Access points that were online but unable to authenticate using the credentials provided. Ensure the server is reachable from the access points and the access points are added as clients on the RADIUS server.
  • APs unreachable : Access points that were not online and thus could not be tested with.

RADIUS Accounting

Optionally, RADIUS accounting can be configured on an SSID that's using WPA2-Enterprise with RADIUS authentication. When RADIUS accounting is configured, "start" and "stop" accounting messages are sent from the access point to the specified RADIUS accounting server.

The following instructions explain how to configure RADIUS accounting on an SSID:

  • Navigate to Wireless >   Configure > Access control  and select the desired SSID from the dropdown menu.
  • Under  RADIUS accounting servers,  click  Add a server. Note:  Multiple servers can be added for failover. RADIUS messages will be sent to these servers in a top-down order.
  • Host IP or FQDN  (the IP address or FQDN the access points will send RADIUS accounting messages to)
  • Auth port  (the port on the RADIUS server that is listening for accounting messages; 1813 by default)
  • Secret  (the shared key used to authenticate messages between the access points and RADIUS server)
  • Click Done and then  Save changes .

At this point, "Start" and "Stop" accounting messages will be sent from the access points to the RADIUS server whenever a client successfully connects or disconnects from the SSID, respectively.

Configuring WPA2-Enterprise with RADIUS using Cisco ISE

Cisco Meraki access points can be configured to provide enterprise WPA2 authentication for wireless networks using  Cisco Identity Services Engine (ISE)  as a RADIUS server. This article will cover instructions for basic integration with this platform. For more detailed information on how to configure Cisco ISE, please refer to the  Cisco Identity Services Engine User Guide .

Prerequisites

  • Cisco ISE installed and reachable from the access points
  • An SSID configured to use WPA2-Enterprise pointing to the Cisco ISE server

Installing Server Certificates

After installation, Cisco ISE generates, by default, a self-signed local certificate and private key, and stores them on the server. This certificate will be used by default for WPA2-Enterprise. In a self-signed certificate, the hostname of Cisco ISE is used as the common name (CN) because it is required for HTTPS communication.

Note:  Using a self-signed certificate is  not  recommended for RADIUS. In order to use the default self-signed cert, clients will need to have RADIUS server's identity validation disabled in order to connect. For certificate options on the RADIUS server you may refer to the RADIUS configuration section in this document. 

Adding Managed Network Devices 

  • In Cisco ISE, choose  Administration > Network Resources > Network Devices .
  • From the Network Devices navigation pane on the left, click  Network Devices .

Add, edit, or duplicate a device:

  • Add : Select Add . Alternatively, click Add new device from the action icon on the Network Devices navigation pane.
  • Edit : Select the check box next to a device and click Edit . Alternatively, click a device name from the list to edit. 
  • Duplicate : select the check box next to a device and click Duplicate .

  4. In the right pane, enter the  Name  and  IP Address .

  5. Check the  Authentication Settings  check box and define a  Shared Secret  for RADIUS authentication. This must match the  Secret  entered for the RADIUS server when configuring the SSID in dashboard.

  6. Click  Submit .

Enabling Policy Sets 

Cisco ISE supports policy sets (see Cisco ISE: Introduction to Policy Sets ), which allows grouping sets of authentication and authorization policies, as opposed to the basic authentication and authorization policy model, which is a flat list of authentication and authorization rules. Policy sets allow for logically defining an organization's IT business use cases into policy groups or services, such as VPN and 802.1X. This makes configuration, deployment, and troubleshooting much easier.

  • In Cisco ISE, choose  Administration > System > Deployment > Settings  > Policy Sets .
  • Click the  Default  policy. The default policy is displayed in the right.
  • Click the plus ( + ) sign on top and choose  Create Above .
  • Enter the  Name ,  Description  and a  Condition  for this group policy.
  • Define the  Authentication policy .
  • Click  Submit . After configuring a policy set, Cisco ISE will log out any administrators. Log in again to access the Admin portal.

Configuring an Authentication Policy 

  • In Cisco ISE, select the  Actions  menu and click  Insert New Rule Above .
  • Give the sub-rule a  Name  (Example: Dot1X).
  • Click the small window icon to open the  Conditions  menu.
  • Select  Create New Condition  (Advanced Option).
  • Select  Network Access > EAP Authentication .
  • Leave the operator box set to EQUALS .
  • In the last box select EAP-MSCHAPv2 .
  • In the  Use  field, select Active Directory as the identity store( see Managing External Identity Sources ). Configure the Active Directory integration as appropriate for the desired deployment.

Networking | Cloud | DevOps | IaC

How to Provision 802.1 X Authentication Step By Step With Dynamic VLAN Assignment With Windows Radius Server For 802.1x Clients

IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius Server

IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius Server is an important element to networking in the real world. User location cannot be predicted as they may be at and out of a desk and up and about should they need to do so. Tying them to a local VLAN may only be helpful if they are bound to desks in those locations, although the most ideal outcome, it is not the most practical.

It is only wise to incorporate IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius Server in areas where you expect different teams to come to. Meeting rooms could for a moment have the accounting group or the development group meeting there and based on the intelligent and dynamic vlan assignmnet with 802.1x authentication, users port-access are defined their appropriate vlans for their respective access to resources on the network.

How to Provision 802.1 X Authentication Step By Step With Dynamic VLAN Assignment With Windows Radius Server For 802.1x Clients.

A typical configuration for a system under IEEE 802.1x Authentication control is shown in the following figure.

In this scenario, “Lady Smith” wishes to use services offered by servers on the LAN behind the switch. There are multiple VLANs with resources available based on user vlan membership. Her laptop computer is connected to a port on the Aruba 2920 Edge Switch that has 802.1x port authentication control enabled.

The laptop computer must therefore act in a supplicant role. Message exchanges take place between the supplicant and the authenticator which is the Aruba 2920 Switch, and the authenticator passes the supplicant’s credentials which is her (Windows Active Directory User Account Credentials) to the authentication server for verification. The NPS Server which is the authentication server then informs the authenticator whether or not the authentication attempt succeeded, at which point “Lady Smith” is either granted or denied access to the LAN behind the switch.

Setup Structure for IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius Server

  • Supplicant: Laptop running Microsoft Windows 10 or Windows 7
  • Authenticator: HP Aruba 2920 Edge Switch
  • Authentication Server: Microsoft NPS (Network Policy Server) running on Windows Server 2012 R2.
  • User Database : Active Directory

For Windows Infrastructure

Create NPS Server – Add Role on Windows Server 2012 R2

  • Create DHCP Scopes for VLANS

Create RADIUS Client on NAC using Network Policy Server

  • Create Network Policies
  • Configure a Network Policy for VLANs
  • Start Wired Auto-Config Service
  • Enable Network Authentication

Create the DHCP Scopes for VLAN100 and VLAN200 Groups

  • Development Group Scope – VLAN 100

SVI: ip address 172.16.80.254 255.255.255.0 Scope Subnet: 172.16.80.1/24

  • Accounting Group Scope – VLAN 200

SVI:ip address 172.16.70.254 255.255.255.0 Scope Subnet: 172.16.70.0/24

Secret Key: secret12

Add Edge Switch Management IP as the RADIUS Client

The Shared Secret Key: secret12 will be used in the Switch Configuration.

Create Network Policy Settings for Accounting Group for VLAN 200

Configuration Example

Here’s an example of how you might consider when configuring Microsoft NPS Server to assign users to a VLAN based on their user group, using NPS for the authentication and authorization of users. This configuration has worked flawlessly on the HP Aruba 2920 Switch. The key to getting this to work is the use of a RADIUS element called: ‘Tunnel-PVT-Group-ID’. This is a RADIUS attribute that may be passed back to the authenticator (i.e. the Aruba 2920 Switch) by the authentication server (i.e. Microsoft NPS Server) when a successful authentication has been achieved. There are a few other elements which need to accompany it, but this is the key element, as it specifies the VLAN number that the user should be assigned to.

The other elements that need to be returned by the NPS Server are as follows:

  • Tunnel-PVT-Group-ID: 200
  • Service-Type: Framed
  • Tunnel-Type: VLAN
  • Tunnel-Medium-Type: 802

For Client Infrastructure

On the Supplicant, Windows 7 or 10 configure the following steps on the Ethernet Adapter to enable IEEE 802.1X Authentication

For Network Infrastructure

Connect Server Infrastructure to VLAN 400

Create VLAN for Accounting Group

Create VLAN for Development Group

Create AAA Configuration on Switch for Radius Authentication

Download the Switch Configuration:

Test the IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius Server

Verify Port-Access with the following user groups – VLAN 100 and VLAN 200

Think of what other clever things you can do from the information below;

Breakdown of Commands for RADIUS Authentication

Verification Commands

Thanks for reading. Please share your thoughts in the comment box below;

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Configure a point-to-site connection to a VNet using RADIUS authentication: PowerShell

  • 16 contributors

This article shows you how to create a VNet with a point-to-site (P2S) connection that uses RADIUS authentication. This configuration is only available for the Resource Manager deployment model . You can create this configuration using PowerShell or the Azure portal.

A point-to-site VPN gateway lets you create a secure connection to your virtual network from an individual client computer. P2S VPN connections are useful when you want to connect to your VNet from a remote location, such as when you're telecommuting from home or a conference. A P2S VPN is also a useful solution to use instead of a site-to-site VPN when you have only a few clients that need to connect to a VNet.

A P2S VPN connection is started from Windows and Mac devices. This article helps you configure a P2S configuration that uses a RADIUS server for authentication. If you want to authenticate using a different method, see the following articles:

  • Certificate authentication
  • Microsoft Entra authentication

P2S connections don't require a VPN device or a public-facing IP address. P2S creates the VPN connection over either SSTP (Secure Socket Tunneling Protocol), OpenVPN or IKEv2.

SSTP is a TLS-based VPN tunnel that is supported only on Windows client platforms. It can penetrate firewalls, which makes it a good option to connect Windows devices to Azure from anywhere. On the server side, we support TLS version 1.2 only. For improved performance, scalability and security, consider using OpenVPN protocol instead.

OpenVPN® Protocol, an SSL/TLS based VPN protocol. A TLS VPN solution can penetrate firewalls, since most firewalls open TCP port 443 outbound, which TLS uses. OpenVPN can be used to connect from Android, iOS (versions 11.0 and above), Windows, Linux and Mac devices (macOS versions 10.13 and above).

IKEv2 VPN, a standards-based IPsec VPN solution. IKEv2 VPN can be used to connect from Windows, Linux and Mac devices (macOS versions 10.11 and above).

For this configuration, connections require the following:

  • A RouteBased VPN gateway.
  • A RADIUS server to handle user authentication. The RADIUS server can be deployed on-premises, or in the Azure VNet. You can also configure two RADIUS servers for high availability.
  • The VPN client profile configuration package. The VPN client profile configuration package is a package that you generate. It provides the settings required for a VPN client to connect over P2S.

About Active Directory (AD) Domain Authentication for P2S VPNs

AD Domain authentication allows users to sign in to Azure using their organization domain credentials. It requires a RADIUS server that integrates with the AD server. Organizations can also leverage their existing RADIUS deployment.

The RADIUS server can reside on-premises, or in your Azure VNet. During authentication, the VPN gateway acts as a pass-through and forwards authentication messages back and forth between the RADIUS server and the connecting device. It's important for the VPN gateway to be able to reach the RADIUS server. If the RADIUS server is located on-premises, then a VPN site-to-site connection from Azure to the on-premises site is required.

Apart from Active Directory, a RADIUS server can also integrate with other external identity systems. This opens up plenty of authentication options for P2S VPNs, including MFA options. Check your RADIUS server vendor documentation to get the list of identity systems it integrates with.

Diagram of RADIUS authentication P2S connection.

Only a site-to-site VPN connection can be used for connecting to a RADIUS server on-premises. An ExpressRoute connection can't be used.

Before beginning

Verify that you have an Azure subscription. If you don't already have an Azure subscription, you can activate your MSDN subscriber benefits or sign up for a free account .

Working with Azure PowerShell

This article uses PowerShell cmdlets. To run the cmdlets, you can use Azure Cloud Shell. Cloud Shell is a free interactive shell that you can use to run the steps in this article. It has common Azure tools preinstalled and configured to use with your account.

To open Cloud Shell, just select Open Cloudshell from the upper-right corner of a code block. You can also open Cloud Shell on a separate browser tab by going to https://shell.azure.com/powershell . Select Copy to copy the blocks of code, paste them into Cloud Shell, and select the Enter key to run them.

You can also install and run the Azure PowerShell cmdlets locally on your computer. PowerShell cmdlets are updated frequently. If you haven't installed the latest version, the values specified in the instructions may fail. To find the versions of Azure PowerShell installed on your computer, use the Get-Module -ListAvailable Az cmdlet. To install or update, see Install the Azure PowerShell module .

Example values

You can use the example values to create a test environment, or refer to these values to better understand the examples in this article. You can either use the steps as a walk-through and use the values without changing them, or change them to reflect your environment.

  • Name: VNet1
  • Address space: 10.1.0.0/16 and 10.254.0.0/16 For this example, we use more than one address space to illustrate that this configuration works with multiple address spaces. However, multiple address spaces aren't required for this configuration.
  • Subnet address range: 10.1.0.0/24
  • Subnet address range: 10.254.1.0/24
  • GatewaySubnet address range: 10.1.255.0/27
  • VPN client address pool: 172.16.201.0/24 VPN clients that connect to the VNet using this P2S connection receive an IP address from the VPN client address pool.
  • Subscription: If you've more than one subscription, verify that you're using the correct one.
  • Resource Group: TestRG1
  • Location: East US
  • DNS Server: IP address of the DNS server that you want to use for name resolution for your VNet. (optional)
  • GW Name: Vnet1GW
  • Public IP name: VNet1GWPIP
  • VpnType: RouteBased

1. Set the variables

Declare the variables that you want to use. Use the following sample, substituting the values for your own when necessary. If you close your PowerShell/Cloud Shell session at any point during the exercise, just copy and paste the values again to redeclare the variables.

2. Create the resource group, VNet, and Public IP address

The following steps create a resource group and a virtual network in the resource group with three subnets. When substituting values, it's important that you always name your gateway subnet specifically 'GatewaySubnet'. If you name it something else, your gateway creation fails;

Create a resource group.

Create the subnet configurations for the virtual network, naming them FrontEnd , BackEnd , and GatewaySubnet . These prefixes must be part of the VNet address space that you declared.

Create the virtual network.

In this example, the -DnsServer server parameter is optional. Specifying a value doesn't create a new DNS server. The DNS server IP address that you specify should be a DNS server that can resolve the names for the resources you're connecting to from your VNet. For this example, we used a private IP address, but it's likely that this isn't the IP address of your DNS server. Be sure to use your own values. The value you specify is used by the resources that you deploy to the VNet, not by the P2S connection.

A VPN gateway must have a Public IP address. You first request the IP address resource, and then refer to it when creating your virtual network gateway. The IP address is dynamically assigned to the resource when the VPN gateway is created. VPN Gateway currently only supports Dynamic Public IP address allocation. You can't request a Static Public IP address assignment. However, this doesn't mean that the IP address changes after it has been assigned to your VPN gateway. The only time the Public IP address changes is when the gateway is deleted and re-created. It doesn't change across resizing, resetting, or other internal maintenance/upgrades of your VPN gateway.

Specify the variables to request a dynamically assigned Public IP address.

3. Set up your RADIUS server

Before you create and configure the virtual network gateway, your RADIUS server should be configured correctly for authentication.

  • If you don’t have a RADIUS server deployed, deploy one. For deployment steps, refer to the setup guide provided by your RADIUS vendor.  
  • Configure the VPN gateway as a RADIUS client on the RADIUS. When adding this RADIUS client, specify the virtual network GatewaySubnet that you created.
  • Once the RADIUS server is set up, get the RADIUS server's IP address and the shared secret that RADIUS clients should use to talk to the RADIUS server. If the RADIUS server is in the Azure VNet, use the CA IP of the RADIUS server VM.

The Network Policy Server (NPS) article provides guidance about configuring a Windows RADIUS server (NPS) for AD domain authentication.

4. Create the VPN gateway

Configure and create the VPN gateway for your VNet.

  • The -GatewayType must be 'Vpn' and the -VpnType must be 'RouteBased'.
  • A VPN gateway can take 45 minutes or more to complete, depending on the  gateway SKU  you select.

5. Add the RADIUS server and client address pool

  • The -RadiusServer can be specified by name or by IP address. If you specify the name and the server resides on-premises, then the VPN gateway may not be able to resolve the name. If that’s the case, then it's better to specify the IP address of the server.
  • The -RadiusSecret should match what is configured on your RADIUS server.
  • The -VpnClientAddressPool is the range from which the connecting VPN clients receive an IP address. Use a private IP address range that doesn't overlap with the on-premises location that you'll connect from, or with the VNet that you want to connect to. Ensure that you have a large enough address pool configured.  

Create a secure string for the RADIUS secret.

You're prompted to enter the RADIUS secret. The characters that you enter won't be displayed and instead will be replaced by the "*" character.

Add the VPN client address pool and the RADIUS server information.

For SSTP configurations:

For OpenVPN® configurations:

For IKEv2 configurations:

For SSTP + IKEv2:

To specify two RADIUS servers, use the following syntax. Modify the -VpnClientProtocol value as needed.

6. Configure the VPN client and connect

The VPN client profile configuration packages contain the settings that help you configure VPN client profiles for a connection to the Azure VNet.

To generate a VPN client configuration package and configure a VPN client, see one of the following articles:

  • RADIUS - certificate authentication for VPN clients
  • RADIUS - password authentication for VPN clients
  • RADIUS - other authentication methods for VPN clients

After you configure the VPN client, connect to Azure.

To verify your connection

To verify that your VPN connection is active, open an elevated command prompt, and run ipconfig/all .

View the results. Notice that the IP address you received is one of the addresses within the P2S VPN Client Address Pool that you specified in your configuration. The results are similar to this example:

To troubleshoot a P2S connection, see Troubleshooting Azure point-to-site connections .

To connect to a virtual machine

You can connect to a VM that's deployed to your virtual network by creating a Remote Desktop Connection to your VM. The best way to initially verify that you can connect to your VM is to connect by using its private IP address, rather than computer name. That way, you're testing to see if you can connect, not whether name resolution is configured properly.

Locate the private IP address. You can find the private IP address of a VM by either looking at the properties for the VM in the Azure portal or by using PowerShell.

Azure portal : Locate your VM in the Azure portal. View the properties for the VM. The private IP address is listed.

PowerShell : Use the example to view a list of VMs and private IP addresses from your resource groups. You don't need to modify this example before using it.

Verify that you're connected to your virtual network.

Open Remote Desktop Connection by entering RDP or Remote Desktop Connection in the search box on the taskbar. Then select Remote Desktop Connection . You can also open Remote Desktop Connection by using the mstsc command in PowerShell.

In Remote Desktop Connection , enter the private IP address of the VM. You can select Show Options to adjust other settings and then connect.

If you're having trouble connecting to a VM over your VPN connection, check the following points:

  • Verify that your VPN connection is successful.
  • Verify that you're connecting to the private IP address for the VM.
  • If you can connect to the VM by using the private IP address but not the computer name, verify that you've configured DNS properly. For more information about how name resolution works for VMs, see Name resolution for VMs .

For more information about RDP connections, see Troubleshoot Remote Desktop connections to a VM .

Verify that the VPN client configuration package was generated after the DNS server IP addresses were specified for the VNet. If you updated the DNS server IP addresses, generate and install a new VPN client configuration package.

Use 'ipconfig' to check the IPv4 address assigned to the Ethernet adapter on the computer from which you're connecting. If the IP address is within the address range of the VNet that you're connecting to, or within the address range of your VPNClientAddressPool, this is referred to as an overlapping address space. When your address space overlaps in this way, the network traffic doesn't reach Azure, it stays on the local network.

For FAQ information, see the Point-to-site - RADIUS authentication section of the FAQ.

Once your connection is complete, you can add virtual machines to your virtual networks. For more information, see Virtual Machines . To understand more about networking and virtual machines, see Azure and Linux VM network overview .

Coming soon: Throughout 2024 we will be phasing out GitHub Issues as the feedback mechanism for content and replacing it with a new feedback system. For more information see: https://aka.ms/ContentUserFeedback .

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Additional resources

[Wireless Router] How to configure RADIUS Setting?

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assign ip address via radius

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What is RADIUS Setting?

This section allows you to set up additional parameters for authorizing wireless clients through RADIUS server. It is required while you select [ Authentication Method ] in [ Wireless ] > [ General ] as [ WPA-Enterprise/ WPA2-Enterprise] .

Note: 1. WPA/WPA2 enterprise is only available on single router, is not available under AiMesh mode.

            2. This feature is not a RADIUS server. 

How to Set up? 

Step 1. Connect your computer to the router via wired or WiFi connection and enter your router LAN IP or router URL https://www.asusrouter.com to the WEB GUI.

assign ip address via radius

Note : Please refer to  How do I enter my ASUS router's setting page using web GUI  to learn more.

Step 2. Key in your router's username and password to log in.

assign ip address via radius

Note: If you forget the user name and/or password, please restore the router to the factory default status and setup.

          Please refer to  How to reset the router to factory default setting?  for how to restore the router to default status.

Step 3. Go to [ Wireless ] >> [ General ] and select [ WPA-Enterprise / WPA2-Enterprise ] in the option of [ Authentication Method ].

            Note: [ Server IP address ], [ Server Port ], and [ Connection Secret ], please enter your information provided by your RADIUS provider.

Step 4. Click [ Apply ] to change the authentication method.

assign ip address via radius

Step 5. Go to [ Wireless ] >> [ RADIUS Setting ].

Step 6. Type your radius [ Server IP address ], [ Server Port ], and [ Connection Secret ] provided by your RADIUS provider.

Step 7. Click [ Apply ] to save the configuration.

assign ip address via radius

How to get the (Utility / Firmware)?

You can download the latest drivers, software, firmware and user manuals in the  ASUS Download Center.

If you need more information about the ASUS Download Center , please refer to this  link .

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Okta Docs

RADIUS network zones

When required you can configure Okta to enforce, restrict, or provide different levels of access depending on the IP address, network zone or geolocation of users accessing your RADIUS-enabled system.

When configuring network zones for use with RADIUS, consider the following:

  • Report Client IP attribute : Often a VPN requirement, this attribute is typically set to Calling-Station-Id . For more information see Client IP reporting .
  • Network Zone s : Network Zone s define security perimeters around which admins can restrict or limit access based on IP address, a range of IP addresses, geo-locations, or more. See Network zones and RADIUS service address filtering for more information. Network Zone s include both IP zones and dynamic zones.
  • IP Zones : These are typically required to correctly process VPN/WiFi client IP addresses when the Report Client IP attribute is configured. For more information see IP zones and Client IP reporting
  • Geolocation or Dynamic Zones : Dynamic Zone s allows admins to define network perimeters around location, IP Type, and Autonomous System Number (ASN). For more information see Dynamic zones .
  • Location based block listing : Location-based block listing can deny RADIUS clients access by blocking a Network Zone such as an IP Zone or Dynamic Zone. IP Zones contain a list of IP addresses while Dynamic Zones contain a list of locations, ASNs, or IP types. Both are often used with geo-location based org-wide blocklisting. For more information see Blocklist network zones
  • RADIUS Agent external public-IP address (as seen by Okta): The RADIUS agent external public IP address must be configured as a trusted proxy. If not, Okta treats the RADIUS agent’s IP address as that of the end user, resulting in unexpected behavior.

Note

Contact Okta if any of these features are required but not available in your org.

© 2024 Okta, Inc . All Rights Reserved. Various trademarks held by their respective owners.

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Controlling Client Parameters via RADIUS ¶

When using RADIUS as an authentication source for a VPN, pfSense® software supports receiving certain client configuration parameters from the RADIUS server as reply attributes.

Inbound firewall rules ¶

Inbound firewall rules to govern traffic from the client to the server.

<IP_PROTO> is the address family / IP protocol ( ip or ipv6 )

<NUM> is a rule number

<rule> is a rule string in Cisco-style ACL format.

Subnet masks must be wildcard style, not CIDR or traditional netmasks.

The firewall replaces the template strings {clientip} and {clientipv6} in rules with the Tunnel IP addresses of the connecting client.

FreeRADIUS example:

Outbound Firewall Rules ¶

Outbound firewall rules to govern traffic from the server to the client.

Aside from the outacl keyword, the format is the same as inbound rules.

DNS Servers ¶

DNS servers that OpenVPN will push to this client.

Separate multiple servers with spaces.

Additional route statements OpenVPN will push to the client.

Specified as x.x.x.x y.y.y.y where the first parameter is a network address and the second is a subnet mask.

Static IP Address ¶

A specific IP address OpenVPN will assign to the client.

If the OpenVPN server uses a subnet style Topology the RADIUS server must also send back an appropriate Framed-IP-Netmask value matching the VPN Tunnel Network .

When using a net30 style Topology , the client receives this IP address and the server side is set as one IP address lower than the address given to the client.

This currently only works for IPv4. The firewall does not support the Framed-IPv6-Address reply attribute at this time.

integrating IT

ASA AnyConnect VPN IP pool assignment using RADIUS

In most scenarios the VPN POOL(s) to assign IP addresses for AnyConnect Remote Access VPNs are statically configured under the tunnel-group. In some situations, it may be desired to dynamically assign the VPN Pool from a RADIUS server, perhaps to use a different IP address pool for certain types of users.

This post describes the steps to use Cisco Identity Services Engine (ISE) and Microsoft Windows Network Policy Server (NPS) RADIUS servers to dynamically assign the VPN Pool during authorisation.

This guide assumes the basic configuration of ASA Remote Access VPN and authentication via ISE or NPS is already setup.

IP Pool assignment using NPS

Microsoft NPS RADIUS server does not contain a detailed list of predefined Vendor Specific Attributes (VSA) to select from. Therefore, a custom vendor must be selected and manually specify the VSA. Refer to the Cisco ASA guide for RADIUS server attributes https://www.cisco.com/c/en/us/td/docs/security/asa/asa92/asdm72/general/asa-general-asdm/aaa-radius.html . The guide lists the supported Cisco VPN RADIUS attributes, these attributes are sent from the RADIUS server to the ASA.

For the NPS configuration, the important information from this Cisco guide is as follows:

  • The Cisco VPN related Vendor Specific Attributes (VSA) are identified by the RADIUS vendor ID 3076.
  • The attribute number for address-pools is 217, as is defined as a string .

The following configuration assumes a Remote Access VPN is configured on the ASA and authenticates via NPS; the steps below describe how to configure the NPS Policy to assign the desired address pool to the ASA.

NPS Configuration

  • Navigate to Settings > Vendor Specific
  • From the Vendor drop-down list, select Custom
  • Select Vendor Specific , then Add

assign ip address via radius

  • Enter 3076 as the Vendor Code
  • Select Yes. It Conforms
  • Click Configure Attributes

assign ip address via radius

  • From the Vendor-assign attribute number , select 217 (this is the VSA for address-pool, as per the Cisco guide )
  • Specify Attribute format as String
  • Specify the Attribute value using the name of the VPN IP address pool as define on the ASA , in this instance NPS_POOL

assign ip address via radius

  • Click Ok to complete

assign ip address via radius

ASA Configuration

On the ASA we will create a dedicated IP Pool called NPS_POOL, this is the exact name and case as configured on the NPS policy .

The NPS RADIUS server must be configured as the aaa-server and defined under the tunnel-group.

In this scenario the ASA has three IP pools defined, including the NPS_POOL previously created.

assign ip address via radius

The tunnel-group is explicitly configured with an address-pool called VPN_POOL_1 , this assigns an IP address from the 192.168.14.0/24 address range. Without the NPS configuration to dynamically assign the VPN IP pool NPS_POOL users would be assigned an IP address from VPN_POOL_1 .

assign ip address via radius

  • From the CLI of the ASA turn on RADIUS debugs using the command debug radius
  • From a test client computer, login to AnyConnect VPN client

From the CLI of the ASA, observe the output of the RADIUS debug. From the output below, we can confirm the Type = 217 attribute number and the value of NPS_POOL is received.

assign ip address via radius

  • Run the command show vpn-sessiondb anyconnect from the CLI of the ASA.

From the output below we can confirm the user received an IP address of 192.168.16.10, which is from the NPS_POOL.

assign ip address via radius

If the dynamically assigned IP address pool did not work, the user would receive an IP address of the VPN pool configured under the tunnel-group, which would be an IP address in the 192.168.14.0/24 range.

IP Pool assignment using ISE

Cisco Identity Services Engine (ISE) has a dictionary list of Cisco and 3 rd party vendors. A dictionary represents a collection of vendor specific attributes (VSA). The same VSA used when configuring the address-pool on the NPS server above, is pre-defined in a dictionary in ISE. The Cisco VPN VSA’s are stored in a dictionary called CVPN3000/ASA/PIX7x on ISE, these attributes work with both ASA and FTD.

The following configuration assumes a Remote Access VPN is configured on the ASA and authenticates via ISE; the steps below describe how to configure the Authorization Profile to assign the desired address pool to the ASA.

ISE Configuration

  • Navigate to Policy > Policy Elements > Results > Authorization > Authorization Profiles
  • Click Add to create a new authorisation profile
  • Name the authorization profile appropriately, i.e., IP_POOL
  • From the Advanced Attributes Settings drop-down list, select Cisco-CVPN3000 dictionary.
  • From the dictionary list, select the attribute CVPN3000/ASA/PIX7x-Address-Pools (217)

assign ip address via radius

  • Navigate to Policy > Policy Sets > NAME OF POLICY
  • Navigate to the Authorization Policy section of the Policy Set
  • Modify or create the authorization rule, select the Result Profile of the Authorization Profile called IP_POOL created in the previous step.

assign ip address via radius

On the ASA we will create a dedicated IP Pool called ISE_POOL, this is the exact name and case as configured in the ISE Authorization Profile.

The ISE RADIUS server must be configured as the aaa-server and defined under the tunnel-group.

In this scenario the ASA has four IP pools defined, including the ISE_POOL previously created.

assign ip address via radius

The tunnel-group is explicitly configured with an address-pool called VPN_POOL_1, this assigned an IP address from the 192.168.14.0/24 address range.

assign ip address via radius

Without the ISE configuration to dynamically assign the VPN IP pool ISE_POOL users would receive and IP address from VPN_POOL_1.

From the CLI of the ASA, observe the output of the RADIUS debug. From the output below, we can confirm the Type = 217 attribute number and the value of ISE_POOL is received.

assign ip address via radius

From the output below we can confirm the user received an IP address of 192.168.17.10, which is from the ISE_POOL.

assign ip address via radius

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Change the hostname of your AL2 instance

When you launch an instance into a private VPC, Amazon EC2 assigns a guest OS hostname. The type of hostname that Amazon EC2 assigns depends on your subnet settings. For more information about EC2 hostnames, see Amazon EC2 instance hostname types in the Amazon EC2 User Guide for Linux Instances .

A typical Amazon EC2 private DNS name for an EC2 instance configured to use IP-based naming with an IPv4 address looks something like this: ip-12-34-56-78.us-west-2.compute.internal , where the name consists of the internal domain, the service (in this case, compute ), the region, and a form of the private IPv4 address. Part of this hostname is displayed at the shell prompt when you log into your instance (for example, ip-12-34-56-78 ). Each time you stop and restart your Amazon EC2 instance (unless you are using an Elastic IP address), the public IPv4 address changes, and so does your public DNS name, system hostname, and shell prompt.

This information applies to Amazon Linux. For information about other distributions, see their specific documentation.

Change the system hostname

If you have a public DNS name registered for the IP address of your instance (such as webserver.mydomain.com ), you can set the system hostname so your instance identifies itself as a part of that domain. This also changes the shell prompt so that it displays the first portion of this name instead of the hostname supplied by AWS (for example, ip-12-34-56-78 ). If you do not have a public DNS name registered, you can still change the hostname, but the process is a little different.

In order for your hostname update to persist, you must verify that the preserve_hostname cloud-init setting is set to true . You can run the following command to edit or add this setting:

If the preserve_hostname setting is not listed, add the following line of text to the end of the file:

To change the system hostname to a public DNS name

Follow this procedure if you already have a public DNS name registered.

For AL2: Use the hostnamectl command to set your hostname to reflect the fully qualified domain name (such as webserver.mydomain.com ).

For Amazon Linux AMI: On your instance, open the /etc/sysconfig/network configuration file in your favorite text editor and change the HOSTNAME entry to reflect the fully qualified domain name (such as webserver.mydomain.com ).

Reboot the instance to pick up the new hostname.

Alternatively, you can reboot using the Amazon EC2 console (on the Instances page, select the instance and choose Instance state , Reboot instance ).

Log into your instance and verify that the hostname has been updated. Your prompt should show the new hostname (up to the first ".") and the hostname command should show the fully-qualified domain name.

To change the system hostname without a public DNS name

For AL2: Use the hostnamectl command to set your hostname to reflect the desired system hostname (such as webserver ).

For Amazon Linux AMI: On your instance, open the /etc/sysconfig/network configuration file in your favorite text editor and change the HOSTNAME entry to reflect the desired system hostname (such as webserver ).

Open the /etc/hosts file in your favorite text editor and change the entry beginning with 127.0.0.1 to match the example below, substituting your own hostname.

You can also implement more programmatic solutions, such as specifying user data to configure your instance. If your instance is part of an Auto Scaling group, you can use lifecycle hooks to define user data. For more information, see Run commands on your Linux instance at launch and Lifecycle hook for instance launch in the AWS CloudFormation User Guide .

Change the shell prompt without affecting the hostname

If you do not want to modify the hostname for your instance, but you would like to have a more useful system name (such as webserver ) displayed than the private name supplied by AWS (for example, ip-12-34-56-78 ), you can edit the shell prompt configuration files to display your system nickname instead of the hostname.

To change the shell prompt to a host nickname

Create a file in /etc/profile.d that sets the environment variable called NICKNAME to the value you want in the shell prompt. For example, to set the system nickname to webserver , run the following command.

Open the /etc/bashrc (Red Hat) or /etc/bash.bashrc (Debian/Ubuntu) file in your favorite text editor (such as vim or nano ). You need to use sudo with the editor command because /etc/bashrc and /etc/bash.bashrc are owned by root .

Edit the file and change the shell prompt variable ( PS1 ) to display your nickname instead of the hostname. Find the following line that sets the shell prompt in /etc/bashrc or /etc/bash.bashrc (several surrounding lines are shown below for context; look for the line that starts with [ "$PS1" ):

Change the \h (the symbol for hostname ) in that line to the value of the NICKNAME variable.

(Optional) To set the title on shell windows to the new nickname, complete the following steps.

Create a file named /etc/sysconfig/bash-prompt-xterm .

Make the file executable using the following command.

Open the /etc/sysconfig/bash-prompt-xterm file in your favorite text editor (such as vim or nano ). You need to use sudo with the editor command because /etc/sysconfig/bash-prompt-xterm is owned by root .

Add the following line to the file.

Log out and then log back in to pick up the new nickname value.

Change the hostname on other Linux distributions

The procedures on this page are intended for use with Amazon Linux only. For more information about other Linux distributions, see their specific documentation and the following articles:

How do I assign a static hostname to a private Amazon EC2 instance running RHEL 7 or Centos 7?

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assign ip address via radius

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assign ip address via radius

IMAGES

  1. Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    assign ip address via radius

  2. How to program Static IP into a Radius Gateway

    assign ip address via radius

  3. How to Assign IP Address on CISCO Switch

    assign ip address via radius

  4. Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    assign ip address via radius

  5. Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    assign ip address via radius

  6. Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    assign ip address via radius

VIDEO

  1. How to connect wireless access point to radius server? how to connect wifi to radius server?

  2. I'll Install & Configure Radius server On linux

  3. How to Assign IP Address through Command Prompt || Assign IP Address Via CMD

  4. Advanced Radius server configuration, part 1

  5. CyneWorX: Assigning IP address manually on Cisco Router/Switch

  6. Assigning IP Address Manually

COMMENTS

  1. Can radius be configured to assign ip addresses?

    I would need to know if a radius server can be configured in such a way that it allows to assign a specific ip address to a device when it connects. I mean, when a mobile device connects to the wifi network issued by an access point and authenticates through raidus, once that authentication has been successful, give the device a specific ip.

  2. How to Configure RADIUS (NPS) Server on Windows Server

    Open the Network Policy Server console (nps.msc) and create a new Radius client. Select New RADIUS Client and configure the following settings: Enable this RADIUS Client; Friendly Name — enter the name of your MikroTik router; Address — specific the IP address of the MikroTik router; Specify your Pre-shared secret key.

  3. RADIUS Configuration Guide

    Using RADIUS, you can control user access to a single host, to a single utility such as Telnet, or to a single protocol such as PPP. For example, when a user logs in, RADIUS identifies this user as having authorization to run PPP using the IP address 10.2.3.4 and the defined access list is started. Networks that require resource accounting.

  4. Configure RADIUS Clients

    In New RADIUS Client, in Friendly name, type a display name for the collection of NASs. In Address (IP or DNS), type the IP address range for the RADIUS clients by using Classless Inter-Domain Routing (CIDR) notation. For example, if the IP address range for the NASs is 10.10..0, type 10.10../16.

  5. Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    The Address Information section shows that the IP address assigned is indeed the first IP address available in the IPv4 local pool configured via FMC. The debug radius all command output on FTD shows: firepower# SVC message: t/s=5/16: The user has requested to disconnect the connection. webvpn_svc_np_tear_down: no ACL webvpn_svc_np_tear_down ...

  6. IP Addressing: DHCP Configuration Guide

    client--A host trying to configure its interface (obtain an IP address) using DHCP or BOOTP protocols. DHCP--Dynamic Host Configuration Protocol. giaddr--Gateway IP address. The giaddr field of the DHCP message provides the DHCP server with information about the IP address subnet on which the client is to reside.

  7. Switch [Dynamic VLAN]

    Open Network Policy Server and right-click on RADIUS Clients > New, to configure Friendly name, IP address, and Shared secret. Configure Connection Request Policies(CRP) Right-click on CRP > New; Specify CRP policy name; Specify Conditions; We suggest to use NAS Identifier (device hostname) and NAS IPv4 Address here if you are unfamiliar in ...

  8. Configuring RADIUS Authentication with WPA2-Enterprise

    Navigate to Wireless > Configure > Access control. Ensure that WPA2-Enterprise was already configured based on the Dashboard Configuration section of this article. Under RADIUS servers, click the Test button for the desired server. Enter the credentials of a user account in the Username and Password fields.

  9. IEEE 802.1X Authentication and Dynamic VLAN Assignment with NPS Radius

    vlan 100 name "Development Group" ip address 172.16.80.254 255.255.255. ip helper-address 10.10.10.40 exit Create AAA Configuration on Switch for Radius Authentication. hostname "Edge Switch Aruba 2920" radius-server host 10.10.10.10 key "secret12" aaa authentication port-access eap-radius aaa port-access authenticator 1-24 aaa port-access ...

  10. Configure a point-to-site connection to a VNet using RADIUS

    The IP address is dynamically assigned to the resource when the VPN gateway is created. ... Once the RADIUS server is set up, get the RADIUS server's IP address and the shared secret that RADIUS clients should use to talk to the RADIUS server. If the RADIUS server is in the Azure VNet, use the CA IP of the RADIUS server VM.

  11. [Wireless Router] How to configure RADIUS Setting?

    Note: [Server IP address], [Server Port], and [Connection Secret], please enter your radius server information. Step 4. Click [Apply] to change the authentication method. Step 5. Go to [Wireless] >> [RADIUS Setting]. Step 6. Type your radius [Server IP address], [Server Port], and [Connection Secret]. Step 7. Click [Apply] to save the ...

  12. radius

    aaa authentication ppp default local aaa authorization network default local aaa attribute list Static-1.2.3.4 attribute type ip-address "1.2.3.4" protocol ip username static privilege 0 password XXXX username static aaa attribute list Static-1.2.3.4 You can use this method to set pretty much any attribute you'd normally set via RADIUS.

  13. RADIUS Attributes Configuration Guide

    Framed-IP-Address Indicates the IP address to be configured for the user, by sending the IP address of a user to the RADIUS server in the access-request. To enable this command, use the radius-server attribute 8 include-in-access-req command in global configuration mode. 9 Framed-IP-Netmask

  14. RADIUS network zones

    For more information see Client IP reporting. Network Zone s: Network Zone s define security perimeters around which admins can restrict or limit access based on IP address, a range of IP addresses, geo-locations, or more. See Network zones and RADIUS service address filtering for more information. Network Zone s include both IP zones and ...

  15. Controlling Client Parameters via RADIUS

    A specific IP address OpenVPN will assign to the client. Framed-IP-Address=x.x.x.x Framed-IP-Netmask=255.255.255. If the OpenVPN server uses a subnet style Topology the RADIUS server must also send back an appropriate Framed-IP-Netmask value matching the VPN Tunnel Network .

  16. ASA AnyConnect VPN IP pool assignment using RADIUS

    Without the NPS configuration to dynamically assign the VPN IP pool NPS_POOL users would be assigned an IP address from VPN_POOL_1. From the CLI of the ASA turn on RADIUS debugs using the command debug radius. From a test client computer, login to AnyConnect VPN client. From the CLI of the ASA, observe the output of the RADIUS debug.

  17. Assign fixed IP with External Radius Server?

    It can assign always the same IP to client per his MAC address. Not from RADIUS (Framed-IP-Address). AFAIK IPSec was able to assign IP from RADIUS Access-Accept response. Maybe you can utilize FGT feature to relay DHCP to the DHCP where your RADIUS server is getting IPs from. So for example you run DC with MSFT DHCP and NPS for RADIUS, then ...

  18. How to share IP address ranges across accounts with AWS Global

    To create an accelerator with a cross-account BYOIP address, do the following: In the Create accelerator wizard, enter a name for the accelerator.; Select an accelerator type and IP address type. Under IP address pool selection, select Use a static IP address from a CIDR authorized for cross-account.; For Select account ID of a cross-account attachment owner, select the account ID of the BYOIP ...

  19. Configure a RADIUS Server and WLC for Dynamic VLAN Assignment

    The IP address of the ACS (RADIUS) server is 172.16.1.1. ... The DHCP server address 172.16.1.1 is used to assign IP addresses to the LWAPP. The internal DHCP server on the controller is used to assign the IP address to wireless clients. VLAN10 and VLAN11 are used throughout this configuration. The user1 is configured to be placed into the ...

  20. Who owns an IP address? IP WHOIS lookup explained

    Technically, ICANN (Internet Corporation for Assigned Names and Numbers) owns all IP addresses. ICANN is responsible for creating, distributing, and maintaining IP addresses. IANA (Internet Assigned Numbers Authority) is another key organization that oversees global IP address allocations. Together, ICANN and IANA ensure that internet resources ...

  21. Change the hostname of your AL2 instance

    Change the system hostname. If you have a public DNS name registered for the IP address of your instance (such as webserver.mydomain.com), you can set the system hostname so your instance identifies itself as a part of that domain.This also changes the shell prompt so that it displays the first portion of this name instead of the hostname supplied by AWS (for example, ip-12-34-56-78).

  22. PDF Configure Static IP Address Assignment to AnyConnect Users via RADIUS

    This document describes how to configure RADIUS Authorization with an Identity Services Engine (ISE) server so it always forwards the same IP address to the Firepower Threat Defense (FTD) for a specific Cisco AnyConnect Secure Mobility Client user via the RADIUS Attribute 8 Framed-IP-

  23. Tutorial: How to Migrate an Access Server Installation

    Access Server 2.10.0 and newer no longer creates the system user, openvpn. Instead, it's created as a local user in Access Server's user database. If you migrate configuration from Access Server 2.9.6 and older, you need to create this system user with these commands: adduser openvpn passwd <SET_PASSWORD>.

  24. PDF Configure a RADIUS Server and WLC for Dynamic VLAN Assignment

    The IP address should be the Management Interface IP address of the WLC. Make sure that the key you enter is the same as the one configured on the WLC under the Security window. This is the secret key used for communication between the AAA client (WLC) and the RADIUS server. 3. 4. Choose RADIUS (Cisco Airespace) from the Authenticate Using ...

  25. Support

    Check the current status of services and components for Cisco's cloud-based Webex, Security and IoT offerings. Cisco Support Assistant. The Cisco Support Assistant (formerly TAC Connect Bot) provides a self-service experience for common case inquiries and basic transactions without waiting in a queue.