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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: "Toke Høiland-Jørgensen" <toke@toke.dk>
Cc: Julian Orth <ju.orth@gmail.com>,
	WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: network namespace wireguard routing [Was: Re: Userspace Networking Stack + WireGuard + Go]
Date: Wed, 13 Jan 2021 17:49:49 +0100	[thread overview]
Message-ID: <CAHmME9rMJ2R3X0iUdYZhGfL6+J0xRyrnvmBws-6T4itP0tZFmA@mail.gmail.com> (raw)
In-Reply-To: <87v9c09450.fsf@toke.dk>

On Wed, Jan 13, 2021 at 5:46 PM Toke Høiland-Jørgensen <toke@toke.dk> wrote:
> 5. also requires CAP_SYS_ADMIN (and I think by extension, so does 3.,
> and 4.). From 'man setns':
>        Network, IPC, time, and UTS namespaces
>               In order to reassociate itself with a new network, IPC,
>               time, or UTS namespace, the caller must have the
>               CAP_SYS_ADMIN capability both in its own user namespace
>               and in the user namespace that owns the target namespace.

For this, you just create a new user namespace first. You can try it
yourself from the command line:

zx2c4@thinkpad ~ $ unshare -n
unshare: unshare failed: Operation not permitted
zx2c4@thinkpad ~ $ unshare -Un
nobody@thinkpad ~ $ ip a
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

  reply	other threads:[~2021-01-13 16:52 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13 16:04 Userspace Networking Stack + WireGuard + Go Jason A. Donenfeld
2021-01-13 16:26 ` Julian Orth
2021-01-13 16:33   ` network namespace wireguard routing [Was: Re: Userspace Networking Stack + WireGuard + Go] Jason A. Donenfeld
2021-01-13 16:40     ` Julian Orth
2021-01-13 16:46     ` Toke Høiland-Jørgensen
2021-01-13 16:49       ` Jason A. Donenfeld [this message]
2021-01-14 10:44         ` Toke Høiland-Jørgensen
2021-01-15  8:12   ` Userspace Networking Stack + WireGuard + Go Marc-André Lureau
2021-01-14 23:25 ` Jason A. Donenfeld

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