MTU on wireguard-apple for IPv6

Rémi Lapeyre remi.lapeyre at
Fri Dec 27 17:10:16 CET 2019

My previous message may have been lost.

> Probably the phone's dhcp server doesn't pass the right MTU back to 
> the client, but then the phone does the mss-mtu hack to fix up TCP 
> connections. That hack doesn't work when the traffic is end-to-end 
> encrypted, as is the case with WireGuard, so no smaller MSS is ever 
> negotiated. 

Won’t this situation happen a lot? Should we fix the default MTU to 1280 
to avoid users having their tunnel randomly fail on some network?

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