On Sat, 25 Jan 2020 at 14:24, Daniele Orlandi <daniele@orlandi.com> wrote:
> A proper binding to the correct VRF would be a better approach, however.

On user-level it can be done by SO_BINDTODEVICE socket option:

«Applications that are to work within a VRF need to bind their socket to
the VRF device:
    setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen(dev)+1);
»

But I am not sure how things work on kernel level.

It would be great to add an option like 'listen-interfaces':

wg set <interface> [listen-port <port>] [listen-interfaces
<interface1>[,<interface2>]... ]

[Interface]
ListenPort=54002
ListenInterfaces=vrf-red,vrf-green

This option can be useful in a non-VRF environment too.