topic Re: Guest session is not being terminated in Network Access Control

Guest session is not being terminated

AkshayJoshi34941 — Tue, 01 Jun 2021 11:13:40 GMT

Version: 2.7.0.356

NAD: Non Cisco /Meraki
Steps:

1. Authenticate guest using CWA, there is no audit session-id attribute

2. Send radius session-timeout as 120 seconds in postauth radius accept packet

3. Send Radius Acct start after successful authentication ( post-auth mab ) with acct-session-id

4. After 120 seconds, NAD sends Radius acct-stop packet with same acct-session-id

5. Immediately trigger mac auth from NAD

Expected:
Redirect role from ISE since session is terminated
Reality:
Getting post auth role from ISE, Again after 120 seconds, when mab is triggered we get proper redirect role

Seeing same issue even if mac-auth is triggered after 1 min of session expiry.
If mab is triggered after 2 minutes of session expiry, then getting redirect role properly.

Note: If we don't send radius acct start and stop packet, the behavior is as expected. We get redirect role after session expiry.
Please help me to understand, if I am doing something wrong.
Attached screenshots and guest.log

Re: Guest session is not being terminated

thomas — Wed, 02 Jun 2021 00:21:56 GMT

Everything looks good to me with your RADIUS log.

Initial MAB defaults to Wifi_Redirect_to_Guest_Login.
You login.
After that, ISE recognizes the MAC address and puts you into Wifi_Guest_Access.

That's how Guest_Flow works because it recognizes the endpoint MAC for the guest account duration (Daily, etc.). You will need to wait the entire account duration or manually purge the endpoint info from ISE for it to be considered a new Guest Endpoint that gets redirected.

Re: Guest session is not being terminated

AkshayJoshi34941 — Wed, 02 Jun 2021 16:46:03 GMT

Auth policy is set to 'Guest Flow', It is not 'Identity Group equals Guest EndPoints'. In the latter case, it will recognise until endpoint is purged right ? My use case is to force re-login of guest client after 30 minutes. How can I achieve that ?

Re: Guest session is not being terminated

thomas — Sun, 06 Jun 2021 21:25:21 GMT

Please use ISE Guest Access Prescriptive Deployment Guide as your reference.

You have not specified what type of Guest portal you are trying to use: Hotspot, Self-Registered, or Sponsored. That changes your options. You said "Authenticate guest using CWA..." so I will assume Self-Registered.

First, create a Guest Type with your 30-minute guest limit. Go to ☰ > Work Centers > Guest Access > Portals & Components > Guest Types and create a new 30MinuteGuest type with these values:

Then go to your Guest portal and assign your 30MinuteGuest Type:

Create a new Authorization Profile for your 30MinuteGuest . I am only showing the 1800 second timeout but you will need to apply whatever ACLs or segmentation you would want for your Guest to limit their access to your internal network if not using an anchor-controller guest architecture.

ISE has a built-in Wi-Fi_Guest_Access policy and Wi-Fi_Redirect_to_Guest_Login (both disabled by default) in the Default Policy Set. You may simply customize with your 30MinuteGuest Authorization Profile :

Re: Guest session is not being terminated

hslai — Tue, 08 Jun 2021 13:22:26 GMT

> If mab is triggered after 2 minutes of session expiry, then getting redirect role properly.

In order to support 3rd-party NADs that do not support CoA reauth, ISE uses this timer to determine whether to continue with the sessions.