ikev2 remote vpn cannot connect to ZyXEl 200H recently

Hoongks
Hoongks Posts: 17  Freshman Member
First Comment Fifth Anniversary
in USG FLEX H Series

Hi, I was able to connect to the ZyXEl 200H via windows 11 vpn client using ikev2 vpn until this week. Out of the 10 computers using ikev2 vpn to connect remotely, only 3 computers are having similar problem. It connected and after a few second it disconnects. Now I cannot connect at all after I try resetting my vpn connected. One of the have a different type of error, indicating that there is a firewall blocking the connection. Before that it was working normally. Anyone have similar problem.

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  • PeterUK
    PeterUK Posts: 3,460  Guru Member
    100 Answers 2500 Comments Friend Collector Seventh Anniversary

    If the other PC's connect fine then it must be fine

    I take it these PC are remote? what router do they have and have they rebooted?

    its possible the Certificate got removed? delete VPN and set it up again

  • Hoongks
    Hoongks Posts: 17  Freshman Member
    First Comment Fifth Anniversary

    All the PC's are connected through their home internet connection. For one of the PC's which use Windows 11 Pro, I found that it had been updated to the latest update. So I revert the PC back to the previous update version, after that the VPN client for that PC is now working normally. So I think somehow the latest Windows 11 update affect the VPN client connection to Zyxel 200H. I have checked and none of the PC's have have their certificates removed. I will try again with the other 2 PC which uses Windows 11 Home and Windows 10. All were working normally for months before the problems start about 2 weeks again.

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