topic Re: Access Manager Authentication Error - EAP TLS in Wireless

Access Manager Authentication Error - EAP TLS

lfneves — Thu, 11 Sep 2025 18:19:48 GMT

Hi everyone,
I'm facing an issue with authentication configured in Access Manager. Random devices are unable to complete authentication using the unique attribute (machine certificate).
The environment is successfully synchronized with Radius in Azure. I validated and re-synced.

The certificate in Meraki matches the certificate on the end device.
I see the error below in the Meraki dashboard:

There have been no recent changes to the environment.
Has anyone else experienced this same issue?

Thankyou.

Re: Access Manager Authentication Error - EAP TLS

aleabrahao — Thu, 11 Sep 2025 18:28:13 GMT

I have a few suggestions for you.

Check the Meraki event logs for timestamps and compare them with the RADIUS logs.
Run a packet capture on the Meraki access point to verify that the RADIUS request was sent and a response was received.
Validate the certificate chain on the client and RADIUS server.
Test with a different device or certificate to isolate the issue.

Re: Access Manager Authentication Error - EAP TLS

Philip D'Ath — Thu, 11 Sep 2025 20:02:16 GMT

What are you using RADIUS if you are using EAP-TLS and Access Manager? Access Manager can directly authenticate users with certificates.

https://documentation.meraki.com/Access_Manager/Access_Manager_Configuration_Guides/Access_Manager_Certificate_Based_Authentication_-_EAP-TLS_with_Entra_ID_Lookup

Re: Access Manager Authentication Error - EAP TLS

lfneves — Fri, 12 Sep 2025 15:41:04 GMT

Hello everyone,

We tried all the recommendations suggested above. We created a new GPO and a new certificate. We re-synced the Meraki cloud and Azure cloud, but without success.
I opened a TAC, and after reviewing it with the engineer, a global issue was identified in Access Manager.

After automatic correction last night, the environment is currently stable.

I appreciate everyone's willingness to support this issue.

Thank you.

Re: Access Manager Authentication Error - EAP TLS

aleabrahao — Fri, 12 Sep 2025 15:56:01 GMT

Nada melhor que o bom e velho TAC hehehe.