The authentication request was rejected due to NTLM authentication error: : Reading winbind reply failed! (0xc0000001)

[Yogakrisnanda]

Hi everyone,

I have some project to deploy Extreme NAC server and the client is bind user via AD (Active Directory) using NTLM authentication. I have configured AAA configuration on NAC for AD and tested users (via wireless) on NAC and it seems error state description "The authentication request was rejected due to NTLM authentication error: : Reading winbind reply failed! (0xc0000001)" and reason "Rejected by NTLM authentication". Please advice for this problem. Thank you.

[Ryan_Yacobucci]

Hello,

Do you have the results of the /var/log/tag.log after the nacctl restart that we could take a quick look at?

Thanks
-Ryan

[Yogakrisnanda]

Hi Robert,

I already following the article and the result are the same. Do you have other ways to solve this problem?

[Robert_Haynes]

Please refer to the following article for potential causes - in most cases your AD service account does not have sufficient privileges to join the domain.

Wireless or Wired client failing authentication in NAC through NTLM with error: Reading winbind repl...