From: Mikma <mikma.wg@lists.m7n.se>
To: wireguard@lists.zx2c4.com,
Nico Schottelius <nico.schottelius@ungleich.ch>,
Mike O'Connor <mike@pineview.net>
Cc: WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: Source IP incorrect on multi homed systems
Date: Sun, 19 Feb 2023 10:19:39 +0100 [thread overview]
Message-ID: <60C522A0-DFAA-4A25-9E6C-8C4AF0962F5B@lists.m7n.se> (raw)
In-Reply-To: <875yby83n2.fsf@ungleich.ch>
Have you tried setting the preferred src address of the route(s) to the addresses you desire?
From "man ip":
> src ADDRESS the source address to prefer when sending to the destinations covered by the route prefix.
On 19 February 2023 09:01:31 CET, Nico Schottelius <nico.schottelius@ungleich.ch> wrote:
>
>Let me rephrase the problem statement:
>
> - ping and http calls to the multi homed machine work correctly:
> I can ping 147.78.195.254 and the reply contains the same address.
> I can ping 195.141.200.73 and the reply contains the same address.
> I can curl 147.78.195.254 and the reply contains the same address.
> I can curl 195.141.200.73 and the reply contains the same address.
>
> - wireguard does NOT work because it changes the reply address:
> A packet sent to 147.78.195.254 is being replied with 195.141.200.73
>
>In general, processes reply with the IP address that was used to contact
>them and not with the outgoing interface address, which would also break
>adding IP addresses to the loopback interface.
>
>For full detail, see ip addresses [0] and routing below [1] and tests
>executed [2].
>
>I believe that this is a bug in wireguard.
next prev parent reply other threads:[~2023-02-19 9:19 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-18 20:14 Nico Schottelius
[not found] ` <CAHx9msc1cNV80YU7HRmQ9gsjSEiVZ=pb31aYqfP62hy8DeuGZA@mail.gmail.com>
2023-02-18 22:34 ` Nico Schottelius
2023-02-19 0:45 ` Mike O'Connor
2023-02-19 8:01 ` Nico Schottelius
2023-02-19 9:19 ` Mikma [this message]
2023-02-19 12:04 ` Nico Schottelius
2023-02-19 12:10 ` Nico Schottelius
2023-02-19 18:59 ` Peter Linder
[not found] ` <2ed829aaed9fec59ac2a9b32c4ce0a9005b8d8b850be81c81a226791855fe4eb@mu.id>
2023-02-19 12:13 ` Nico Schottelius
2023-02-19 14:39 ` Christoph Loesch
2023-02-19 16:32 ` David Kerr
2023-02-19 16:54 ` Sebastian Hyrvall
2023-02-19 18:04 ` Janne Johansson
2023-02-19 18:08 ` Sebastian Hyrvall
2023-02-19 20:11 ` Nico Schottelius
2023-02-19 17:05 ` tlhackque
2023-02-19 18:37 ` David Kerr
2023-02-19 18:52 ` tlhackque
2023-02-19 18:42 ` tlhackque
2023-02-19 20:18 ` Nico Schottelius
2023-02-19 20:42 ` Roman Mamedov
2023-02-19 21:19 ` Nico Schottelius
2023-02-19 22:06 ` tlhackque
2023-02-19 22:42 ` Src addr code review (Was: Source IP incorrect on multi homed systems) Daniel Gröber
2023-02-20 0:28 ` 曹煜
2023-02-20 10:40 ` Nico Schottelius
2023-02-20 11:21 ` 曹煜
2023-02-20 9:47 ` Nico Schottelius
2023-02-20 20:43 ` dxld
2023-02-19 21:39 ` Source IP incorrect on multi homed systems tlhackque
[not found] ` <CADGd2DoE6TCtCxxWL7JWyNW5+yy_Pe+9MNzHznbudMWLTXQreA@mail.gmail.com>
2023-02-19 18:30 ` Fwd: " John Lauro
2023-02-19 22:28 ` tlhackque
2023-02-20 0:58 ` Luiz Angelo Daros de Luca
2023-02-19 20:02 ` Nico Schottelius
2023-02-20 11:09 Janne Johansson
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