topic Re: WIFI connection is disconnecting in Network Access Control

WIFI connection is disconnecting

Turki.A.Baqatada — Wed, 19 Feb 2025 14:26:22 GMT

Hello Dears

I faced an issue recently that WIFI is disconnects when I use secure client posture and as I checked automatically connect option so the connection disconnect and connect and secure client posture module every time scanning

In the beginning i though from wifi adapter but when i connect to normal wifi every thing is working fine

Re: WIFI connection is disconnecting

ahollifield — Wed, 19 Feb 2025 16:22:25 GMT

Are you using NAM? Or just posture? What is the NAD? Are you drivers up to date?

https://community.cisco.com/t5/security-documents/how-to-ask-the-community-for-help/ta-p/3704356

Re: WIFI connection is disconnecting

Turki.A.Baqatada — Wed, 19 Feb 2025 16:31:55 GMT

We are using just posture only with peap and drivers are up to date

8500 wireless lan controller the client is windows 11

One thing to add i created authorization policy to exclude the client and work without posture and started work fine

Re: WIFI connection is disconnecting

ahollifield — Wed, 19 Feb 2025 16:45:14 GMT

https://www.cisco.com/c/en/us/products/collateral/wireless/8500-series-wireless-controllers/eos-eol-notice-c51-740222.html

https://www.cisco.com/c/en/us/products/collateral/wireless/8540-wireless-controller/eos-eol-notice-c51-744431.html

Why are you using PEAP? PEAP uses md4 encryption and should no longer be deployed. Why not use certificates with EAP-TLS or TEAP?

Is CoA correctly configured on the NAD? What exactly do the ISE logs say?

Re: WIFI connection is disconnecting

Turki.A.Baqatada — Wed, 19 Feb 2025 17:22:17 GMT

First of all thank you for your kind reply

Actually laptops are not joind to domain, TEAP needs certificate to be pushed for them and it is difficult to do same so that's why we are using PEAP

For the laptop everthing shows normal in ISE and client it is compliant

But the issue is after goes to compliant it is scanning againg because the WIFI connection disconnected and connected again also in live session shows terminated

As I said before could be from wifi adapter but when i connected to other networks worked fine without no issue that's what makes me think about posture

It is only for one client others working fine even windows 11 so i asked here maybe someone faced this kind of issues and if there is any debug steps i can follow

Re: WIFI connection is disconnecting

ahollifield — Wed, 19 Feb 2025 17:33:18 GMT

Well if it’s only one endpoint I would start with what’s different about this one endpoint. Or where it’s physically located in the building; maybe that area has poor wireless coverage or interference?

Also what is the use-case for 802.1X at all here? What is the reason to allow unmanaged/unknown endpoints to join the protected network?