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xfrm interface not shown after creating VPN connection to Azure VPN Gateway

Hello everyone, 

we followed this guide (https://community.sophos.com/sophos-xg-firewall/f/recommended-reads/126356/sophos-xg-firewall-v18-to-azure-vpn-gateway-ipsec-connection) to setup the azure vpn connection be cannot complete it due to the missing interface. The vpn connection works flawlessly but i am missing somehting in regard to this interface. 

We have two xg-firewalls connected as an HA-Cluster. The two firewalls are connected behind another router/modem which connects to our provider. Could this be the issue that the firewall won't create the xfrm interface because it doesn't use the internal modem? 

I already checked other threads regarding this topic but I can confirm that there are no hidden interfaces. I even tried different browsers (Chrome, Firefox, Safari)

Any help would be much appreciated.



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  • Thank you very much for your answer, I looked into the "WAN link manager" and into the interfaces as described in the other thread and unfortunately i cannot find the place where to override the MSS setting only for the VPN connection.

    As you can see Port1 or Port2 are our WAN-Interfaces and they have a public ip assigned as an alias. Also there is no expanding possible.

      

    These are our two WAN Gateways.

    I hope this helps.