Mixed MTU hosts on a network
matthias.ordner at noris.net
Fri Mar 16 10:35:18 CET 2018
> When WireGuard starts by default, it sets MTU of its interface to 1420. All
> TCP connections trying to send a stream of data over the WG interface to that
> host, hang up (I test with iperf3).
If you only care about TCP connections you could set a different TCP-MSS
with an iptables rule.
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