Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

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Enable IPv6 on SSL VPN

Hello,

I have a user that has T Mobile as their home internet. Through research and asking peers in the field it seems that T Mobile's setup is IPv6 compatible only. When the user tries to connect via VPN, they get intermittent and slow connectivity to some things and no connectivity to other things. When using another internet connection, the VPN works fine.

How do I enable IPv6 over the SSL VPN? Is it as simple as allowing IPv6 addresses to be handed out? Or do I need to do some kind of translation? We don't have IPv6 properly configured on our network and it will likely be some time before we can get into that, and the employee needs to work from home.

Any thoughts/suggestions appreciated. TIA



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  • Hi,

    please check whether the ISP/RSP  is using native IPv6 to the internet or using a IPv6 to IP4 gateway. Why I asked is my mobile carrier uses IPv6 internally but has an IPv6 to IP4 gateway.

    Ian

    XG115W - v20.0.2 MR-2 - Home

    XG on VM 8 - v21 GA

    If a post solves your question please use the 'Verify Answer' button.

  • It does not matter as I have got the dual stack working now. Had to guess all the v6 settings no tech doc! What's really surprising is the v4 is behind CGNAT and v6 is not. First time to have VPN server being CGNAT way to go Sophos! Using mobile phone hotspot for client and server on Starlink w/dual stack.

  • I can connect to desktops with v4 and v6 ip addresses! VPN counts 2 users one for v4 and one for v6