ipsec vpn still not working after 4.73 Patch 2 update

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Hello

I have around 7-8 vpn tunnels between zyxel USG60W , Azure, zyxel flex, etc

Even if I see vpn tunnel established, there is no inbound traffic through the tunnel.

This is totally random. Today there is a vpn tunnel not working , next day another one, after restart the vpn tunnels which worked do not work anymore, etc

What is the problem ? Is there any fix for this?

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  • Zyxel_Kevin
    Zyxel_Kevin Posts: 754  Zyxel Employee
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    Hi @Radu_Stanila ,
    Greeting Forum,

    May we have remote session to check the issue ?

    We can start at 08:00~17:00 (UTC+8) . Thank you

  • Radu_Stanila
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    can we have the session now ? what do yo prefer ? zoom ?

  • Zyxel_Kevin
    Zyxel_Kevin Posts: 754  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer
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    Hi @Radu_Stanila ,

    Thank your time today.

    USG60w has some problem when decryted ESP header, so the traffic doen't reach the peer lan correctly.

    Now works fine after switching to AH.

    Please feel free to contact me if any concerns. Thank you

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