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L2TP VPN over same WAN Network

Hi,

i have an interesting problem with an L2TP VPN connection and Sophos XG. When i connect with L2TP VPN from LTE or another location, the vpn connection is established. But when i will connect from the same WAN subnet, the vpn connection will be aborted. In the same enviroment with the same network settings, a Sophos SG or a Microsoft TMG have no problems to connect via L2TP VPN. Do I need to configure anything else in Sophos XG for connecting from the same subnet?

Thanks a lot,

Christian



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  • FormerMember
    0 FormerMember

    Hi ,

    Thank you for reaching out to the Community!

    Can you please explain what do you mean by "But when i will connect from the same WAN subnet, the VPN connection will be aborted." 

    Did you mean you have multiple alias IP address configured on the WAN interface of the XG? Or are you talking about the external source network? 

    In any case, I would suggest you run a packet capture on the source IP address to determine if the traffic arrives on the firewall or blocked before the firewall. 

    Thanks,

  • The WAN IP´s are static from the provider.

    Router WAN (195.140.50.210)

    SophosXG WAN (195.140.50.205)

    When i connect from other IP (other Location or LTE) the VPN connection will be established.

    I reach the Sophos XG with the VPN client and will be asked for my login credentials, after a time from 5s the connection will be aborted.

    And when i change the Sophos XG to a Sophos SG wiht the same network settings, the vpn connection will be established.

    Is there a special bumper in the Sophos XG so that it works (in the same subnet)?

    Thanks,

    Christian

  • I think thats a bug in the sophos xg firmware to connect via vpn over the same subnet.