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chinlong
New Contributor

Protected by an authentication firewall

Hi All,

 

I have setup FAC as a RADIUS server and connecting AD using LDAP. The FAC has joined the AD domain and FAC able to retrieve the user from AD domain. When I try to authenticate user using 802.1x, it shows the authentication failed due to the machine you are logging onto is protected by an authentication firewall.

 

May I know if anyone encounter this issue before and what could be the possibility that causing this issue?

 

Screenshot 2024-08-14 152600.png

 

 

1 REPLY 1
ozkanaltas
Valued Contributor III

Hi @chinlong ,

 

I hadn't faced this issue before but when I did some research I found an MS article related to this issue. This article also provides solution steps. Can you try these solution steps?

 

https://learn.microsoft.com/en-us/troubleshoot/windows-server/windows-security/tgs-request-for-krbtg...

 

Also, sometimes FAC can be dropped from the domain. In such cases, I change the FAC's machine name and have it re-join the domain.

 

If you have found a solution, please like and accept it to make it easily accessible to others.
NSE 4-5-6-7 OT Sec - ENT FW
If you have found a solution, please like and accept it to make it easily accessible to others.NSE 4-5-6-7 OT Sec - ENT FW
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