L2TP over IPSec Stopped Working w/o Any Changes?
Freshman Member
Hi Guys,I called ZyXel Support today, got a tech online for help, he says wait a minute, left and never came back while staying connected to my computer for over 20min, i wrote to him on AnyDesk, he moved the mous but never answered...Not sure if he fell asleep or something lol
Anyhow, i noticed L2TP over IPSec from Windows Client no longer works for any of my ZyWall USG20w routers..I believe these don't work wotj CHAP ver 2?
I deleted the default VPN settings and created a new one, getting the same error which are attached to this message, hoping someone can shed some light
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All Replies
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Hi NSIT,
no post attachments as far as i can see. Sorry
Anyway: you said
i noticed L2TP over IPSec from Windows Client no longer works for any of my ZyWall USG20w routers
would you please try to elaborate a bit more with info your setup? The usual stuff...- which windows version
- which firmware version of USG20W
- if your USG20W is behind a NAT or public IP configured
- If you can connect to your device from another OS (iOS/Androd)
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Hi, thank you for your reply!
I added the missing attachments
Windows version 21H2 on Remote Computer.
USG20w Firmware version is: 3.30(BDR.9) / 1.17 / 2016-11-22 10:05:22
I can connect fine with Windows 7 running as a VM
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Can you share your win10 PC's L2TP properties? Like the below screenshot of my PC.
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Hi, i believe the old ZyWall USG20w does not support CHAP v2?
I tried both CHAP v2, CHAP, or Both...No Change!0 -
Oh~ Have you tried PAP only?
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Even tried PAP, i can connect fine from a Win 7 client but since ver 21H2 of Windows, none of my customers can use L2TP over IPSec for VPN0
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Many others having the issue...
https://docs.microsoft.com/en-us/answers/questions/337796/20h2-l2tp-vpn-connection-failure.html
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Anyone? Is this due to the fact that routers with ver 3.xx firmware behind a NAT are not compatible with Ms Chap ver2 ?0
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It seems your firmware version(3.XX) is too old, it doesn't support MS-CHAP v2.
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It was working fine until Windows ver 21H2...1
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