* Re: Fwd: Re: wg-quick broken by iproute2 update
2018-06-28 12:32 ` Fwd: Re: wg-quick broken by iproute2 update Silvan Nagl
@ 2018-06-28 17:28 ` Silvan Nagl
0 siblings, 0 replies; 2+ messages in thread
From: Silvan Nagl @ 2018-06-28 17:28 UTC (permalink / raw)
To: wireguard, stunnel
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Hi,
here the last message of redhat:
/The issue has been fixed upstream: -commit
7c8f4e6dc30996bff806285730a0bb4e714d3d52 Author: Jason A. Donenfeld //<Jason@zx2c4.com>//Date: Tue Jun 26 01:39:32 2018 +0200 fib_rules: match rules based on
suppress_* properties too Two rules with different values of
suppress_prefix or suppress_ifgroup are not the same. This fixes an
-EEXIST when running: $ ip -4 rule add table main suppress_prefixlength
0 Signed-off-by: Jason A. Donenfeld //<Jason@zx2c4.com>//Fixes: f9d4b0c1e969 ("fib_rules: move common handling of newrule delrule
msgs into fib_nl2rule")/
problem should be considered as fixed.
Regards,
Silvan
On 06/28/2018 02:32 PM, Silvan Nagl wrote:
>
>
>
>
> -------- Forwarded Message --------
> Subject: Re: wg-quick broken by iproute2 update
> Date: Thu, 28 Jun 2018 11:53:59 +0200
> From: Silvan Nagl <mail@53c70r.de>
> To: stunnel@attglobal.net
>
>
>
> Hi,
>
> since i had to debug this problem already i can tell you it is not
> iproute2 causing the problem.
> The main problem is that the current standard kernel of CentOS simple
> does not support the handling of "suppress_prefixlength".
> Iproute2 supports it since it does not return any error while adding so
> it had to be the kernel causing problems.
> In essence Red Hats official answer was "It isn't a bug, RHEL7 simple
> does not support it".
> If you sill want to fix your problem just upgrade your kernel to
> long-term or mainline.
>
> Regards,
> Silvan
>
> On 06/28/2018 04:47 AM, Eddie wrote:
> > Hi,
> >
> > I just updated both a RHEL and a CentOS system from 7 -> 7.5.
> > Following this, when running wg-quick, the routing tables are not
> > updated correctly. Both systems are running
> > iproute.x86_64-4.11.0-14.el7, but from different repositories and are
> > definitely different builds as they install to different sbin libraries.
> >
> > Here's what I'm seeing:
> >
> > [eddieath@oc8361880017 ~]$ sudo ip rule list
> > 0: from all lookup local
> > 32766: from all lookup main
> > 32767: from all lookup default
> > [eddieath@oc8361880017 ~]$
> > [eddieath@oc8361880017 ~]$ sudo wg-quick up wg0
> > [#] ip link add wg0 type wireguard
> > [#] wg setconf wg0 /dev/fd/63
> > [#] ip address add 192.168.0.11/24 dev wg0
> > [#] ip link set mtu 1420 dev wg0
> > [#] ip link set wg0 up
> > [#] ip -4 route add 0.0.0.0/0 dev wg0 table 51820
> > [#] ip -4 rule add not fwmark 51820 table 51820
> > [#] ip -4 rule add table main suppress_prefixlength 0
> > [eddieath@oc8361880017 ~]$
> > [eddieath@oc8361880017 ~]$ sudo ip rule list
> > 0: from all lookup local
> > 32764: from all lookup main
> > 32765: not from all fwmark 0xca6c lookup 51820
> > 32766: from all lookup main
> > 32767: from all lookup default
> > [eddieath@oc8361880017 ~]$
> >
> > Note the "suppress_prefixlength 0" has been dropped, which really
> > breaks the routing with a "normal" main ahead of table 51820.
> > Following this, when running the "down", the duplicated table is not
> > removed, as there is no match searching for "suppress_prefixlength 0":
> >
> > [eddieath@oc8361880017 ~]$ sudo wg-quick down wg0
> > [#] wg showconf wg0
> > sync: ignoring all arguments
> > [#] ip -4 rule delete table 51820
> > [#] ip link delete dev wg0
> > [eddieath@oc8361880017 ~]$ sudo ip rule list
> > 0: from all lookup local
> > 32764: from all lookup main
> > 32766: from all lookup main
> > 32767: from all lookup default
> > [eddieath@oc8361880017 ~]$
> >
> > I've confirmed this on both systems and also that the behaviour is
> > purely within ip, and not anything that wg-quick is doing:
> >
> > [eddieath@oc8361880017 ~]$ sudo ip rule list
> > 0: from all lookup local
> > 32766: from all lookup main
> > 32767: from all lookup default
> > [eddieath@oc8361880017 ~]$ sudo ip -4 rule add table main
> > suppress_prefixlength 0
> > [eddieath@oc8361880017 ~]$ sudo ip rule list
> > 0: from all lookup local
> > 32765: from all lookup main
> > 32766: from all lookup main
> > 32767: from all lookup default
> > [eddieath@oc8361880017 ~]$
> >
> > Cheers.
> >
> > _______________________________________________
> > WireGuard mailing list
> > WireGuard@lists.zx2c4.com
> > https://lists.zx2c4.com/mailman/listinfo/wireguard
>
>
>
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