Source IP incorrect on multi homed systems

Janne Johansson at
Sun Feb 19 18:04:49 UTC 2023

Den sön 19 feb. 2023 kl 18:06 skrev Sebastian Hyrvall <sh at>:
> You should get into that debate. Proposing firewall workarounds is not a
> correct solution so please don't do it. It needs to be fixed. It's an
> immature VPN solution that always just proposed a workaround instead of
> fixing the problem.

I would make sure that you are not mis-ascribing the problem* to "an
immature VPN" and not what the default UDP behaviour of the kernel is,
to pick a working interface to send packets from based on the routing
table, in which any/all udp based tunnel would suffer the same
problem. If you google it, you may find that other udp transports face
the same "problem".


May the most significant bit of your life be positive.

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