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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 24 Sep 2017 00:44:48 +0200
Message-ID: <CAHmME9pD--t1gNhZ=W=LS1PC0Rz3umEY8pbpsbcmU8MSqp5XCw@mail.gmail.com>
Subject: Re: Bridge interfaces?
To: Lord Kitsuna <lordkitsuna112@gmail.com>
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Hi,

Yes indeed this is possible. Enable ip forwarding (sysctl -w
net.ipv4.ip_forwarding=1), and then make sure you have the correct
routes set. You may have to add a few entries to your allowed-ips to
ensure that the network is okay with wireguard, or, perhaps easier,
would to just enable MASQUERADEing (iptables -t nat -A POSTROUTING -s
10.8.8.0/24 -o tinc0 -j MASQUERADE, where 10.8.8.0/24 is the wireguard
network.)

There are a lot of ways to skin the cat, and I suspect if you write
back with details of network segments and whatnot, there might be
others who might have their own useful opinions. Alternatively, you
can always ask in #wireguard on Freenode.

Jason