FLEX 200, L2TP suddenly stopped working

syraarpe

We have been running L2TP with MS-CHAP v2 for some time.
But its suddenly stopped working, and the logs says 'No proposal chosen'

When going all settings, its looks fine

FW is: 5.32(ABUI.0)



maybe @Zyxel_Emily have any idea

Zyxel_Kevin

Hi @syraarpe, 
After remote checked , L2TP works again after disable X-Auth.
Please kindly check the issue is resolved. 
Thank you
Kevin

Zyxel_Kevin

Hi @syraarpe,
The proposal from end client may change after OS update. 
Please kindly check detail log messages to find suite proposal and set the match proposal on firewall .

You can refer the FAQ 
How to check IKEv2 settings when it is not working
Thank you
Kevin

syraarpe

I have allready tryed from 3 different OS. Win11, win10 and srv2012.
And win10, was an older version, that havent been updated in a while.
All doing the same error.

I have also added a few more proposel, but its still fails, and never says mismatch. Just no chosen.

However i can see the firmware was installed 30 days ago on FW. So maybe there is a bug?

Zyxel_Kevin

Hi @syraarpe, 
Please kindly share your config by private message. 
I will do the check . Thank you
Kevin

Zyxel_Kevin

Hi @syraarpe, 
After remote checked , L2TP works again after disable X-Auth.
Please kindly check the issue is resolved. 
Thank you
Kevin