Advice on setting up a L2TP VPN on Proxmox.

[shymega]

Hello,

(If this post seems familiar, I originally asked on the mailing list, but I'm posting it here for visibility)

I've got a Proxmox server, and I'm wanting to use an A&A L2TP VPN[0] on
the Proxmox host.

I'm unsure how to set this up in `/etc/network/interfaces`, as I
primarily use NetworkManager on NixOS.

I was thinking of running pfSense/opnSense in a VM, and then connecting
my VMs and LXC containers behind it. The reason I'm using an L2TP VPN is
because the hosting company don't offer IPv6 without a block of IPv4 IPs,
and I think that's overkill. All I need is one IPv6 block and one IPv4
address.

My desired setup would be:

WAN <==> L2TP VPN <==> Proxmox host <==> Firewall VM
| |
VMs <=> <=> LXC
[0]: https://www.aa.net.uk/broadband/l2tp-service/

Is this possible?

Thank you!

 

[shymega]

Ah, I see my text diagram formatting has borked.