# Authentication error via AD RADIUS

**URL:** <https://forum.pritunl.com/t/authentication-error-via-ad-radius/2269>\
**Category:** Pritunl VPN\
**Created:** [August 9, 2024, 11:21am UTC](https://forum.pritunl.com/t/authentication-error-via-ad-radius/2269 "2024-08-09T11:21:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![10kur](https://forum.pritunl.com/letter_avatar_proxy/v4/letter/1/d6d6ee/32.png) [@10kur](https://forum.pritunl.com/u/10kur)\
**Post date:** [August 9, 2024, 11:21am UTC](https://forum.pritunl.com/t/authentication-error-via-ad-radius/2269/1 "2024-08-09T11:21:39Z")

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When I try to login via a RADIUS-enabled account, on the web interface, the login is unsuccessful, with the message “Server error ocurred”.  
In the same time, I see the following messages in the logs:  
[autumn-stars-9118][2024-08-09 11:14:39,572][ERROR] Exception on /auth/session [POST]  
Traceback (most recent call last):  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/flask/app.py”, line 2190, in wsgi\_app  
response = self.full\_dispatch\_request()  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/flask/app.py”, line 1486, in full\_dispatch\_request  
rv = self.handle\_user\_exception(e)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/flask/app.py”, line 1484, in full\_dispatch\_request  
rv = self.dispatch\_request()  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/flask/app.py”, line 1469, in dispatch\_request  
return self.ensure\_sync(self.view\_functions[rule.endpoint])(\*\*view\_args)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/auth/app.py”, line 26, in \_wrapped  
return call(\*args, \*\*kwargs)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/handlers/auth.py”, line 360, in auth\_session\_post  
return \_auth\_radius(username, password, remote\_addr)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/handlers/auth.py”, line 23, in \_auth\_radius  
valid, org\_names, groups = sso.verify\_radius(username, password)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/sso/radius.py”, line 41, in verify\_radius  
reply = conn.SendPacket(req)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/pyrad/client.py”, line 187, in SendPacket  
return self.\_SendPacket(pkt, self.authport)  
File “/usr/lib/pritunl/usr/lib/python3.9/site-packages/pritunl/pyrad/client.py”, line 175, in \_SendPacket  
raise Timeout  
pritunl.pyrad.client.Timeout

However, another server connected to the same RADIUS does not have any problem in authentication, both web and for client.

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<div class="post-metadata">

**Author:** ![zach](https://forum.pritunl.com/user_avatar/forum.pritunl.com/zach/32/1105_2.png) [@zach](https://forum.pritunl.com/u/zach)\
**Post date:** [August 10, 2024, 10:21pm UTC](https://forum.pritunl.com/t/authentication-error-via-ad-radius/2269/2 "2024-08-10T22:21:29Z")

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The command `sudo pritunl set app.sso_radius_timeout 60` will increase the timeout but this is likely a firewall or incorrect port. The default timeout is 5 seconds.

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<div class="post-metadata">

**Author:** ![10kur](https://forum.pritunl.com/letter_avatar_proxy/v4/letter/1/d6d6ee/32.png) [@10kur](https://forum.pritunl.com/u/10kur)\
**Post date:** [August 11, 2024, 6:11am UTC](https://forum.pritunl.com/t/authentication-error-via-ad-radius/2269/3 "2024-08-11T06:11:41Z")

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Thank you for the reply, I was suspecting that. I will contact my network team for further investigations