From: Andrew Morton <akpm@linux-foundation•org>
To: netdev@vger•kernel.org
Cc: Patrick McHardy <kaber@trash•net>,
"bugme-daemon@kernel-bugs•osdl.org"
<bugme-daemon@bugzilla•kernel.org>,
elendil@planet•nl
Subject: Re: [Bugme-new] [Bug 8519] New: NAT prerouting over tun interface broken
Date: Mon, 21 May 2007 13:13:43 -0700 [thread overview]
Message-ID: <20070521131343.cbf3bcaa.akpm@linux-foundation.org> (raw)
In-Reply-To: <200705212005.l4LK5aJk029945@fire-2.osdl.org>
On Mon, 21 May 2007 13:05:36 -0700
bugme-daemon@bugzilla•kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=8519
>
> Summary: NAT prerouting over tun interface broken
> Kernel Version: 2.6.21.1
> Status: NEW
> Severity: normal
> Owner: networking_netfilter-iptables@kernel-bugs•osdl.org
> Submitter: elendil@planet•nl
>
>
> Most recent kernel where this bug did *NOT* occur: 2.6.20.7
> Distribution: Debian unstable
> Hardware Environment: EM64T (Pentium D) running amd64 kernel
> Software Environment: Debian unstable
>
> Problem Description:
> I have the hercules s/390 emulator running on an EM64T host, both running
> Debian unstable. I use a tun interface, a second IP address on eth0 and
> iptables/nat so the emulator has it's own address on my local network.
>
> With 2.6.21.1 on the host, networking between the emulator and the host system
> is fine (I can ssh from the host into the emulator without problems), but
> communication from the emulator with other boxes is broken. Other boxes also
> don't see the emulator if I ping its external address.
>
> If I ping another box on my LAN from the emulator while running wireshark on
> the host, I can see that:
> - the echo request gets sent OK
> - the other box replies OK
> - the host receives the echo reply
> - but the tun interface never gets it.
>
> If I boot the host with 2.6.20 everything works fine again.
>
> Here is how the setup looks:
> |---------------- host system --------------------|
> |-- emulator --|
> eth0 tun ctc0
> LAN <---> 10.19.66.21
> LAN <---> 10.19.66.92 <---> 10.19.92.2 <---> 10.19.92.1
> nat P2P
>
> The only active iptables rules are:
> iptables -t nat -A PREROUTING -d 10.19.66.92 \
> -j DNAT --to-destination 10.19.92.1
> iptables -t nat -A POSTROUTING -s 10.19.92.1 \
> -j SNAT --to-source 10.19.66.92
next parent reply other threads:[~2007-05-21 20:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200705212005.l4LK5aJk029945@fire-2.osdl.org>
2007-05-21 20:13 ` Andrew Morton [this message]
2007-05-21 22:28 ` [Bugme-new] [Bug 8519] New: NAT prerouting over tun interface broken Patrick McHardy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070521131343.cbf3bcaa.akpm@linux-foundation.org \
--to=akpm@linux-foundation$(echo .)org \
--cc=bugme-daemon@bugzilla$(echo .)kernel.org \
--cc=elendil@planet$(echo .)nl \
--cc=kaber@trash$(echo .)net \
--cc=netdev@vger$(echo .)kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox