two tinc hosts behind same NAT

[Eric Feliksik]

Dear all,

I have 3 nodes: A, B and C. C has external IP and A and B are behind NAT.

It turns out A and B route their traffic via the C, which they ConnectTo
with; this instead of getting connection details from one another and
contacting eachother directly (mesh style). The reason is, as I conclude
from tincd debug output, is that they see the peer as having a minimum MTU
of 0. I suspect this is because both nodes happen to be behind the same NAT
and thus have the same public IP, in this particular case.

If I place the nodes in different NATed enviroments (different public IP's)
it does work.

Can this be fixed in a way such that nodes A and B do directly communicate?

Thanks in advance,
Eric
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