From: Pablo Neira Ayuso <pablo@netfilter.org>
To: "Nicki P." <xastx@gmx.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: ipt_SYNPROXY: kernel panic caused by nullpointer dereference
Date: Sun, 8 Dec 2013 11:01:46 +0100 [thread overview]
Message-ID: <20131208100146.GA3840@localhost> (raw)
In-Reply-To: <e9d26e1c009f406b1bb5a893aebc7771.squirrel@webmail.interwerk.de>
On Sun, Dec 08, 2013 at 08:16:00AM +0100, Nicki P. wrote:
> hi,
>
> when activating ipt_SYNPROXY with:
> iptables -t raw -A PREROUTING -p tcp -d 1.2.3.4 --dport 80 --tcp-flags
> SYN,ACK,RST,FIN SYN -j SYNPROXY
>
> and sending a SYN packet to port 80:
> hping3 -S -d 64 1.2.3.4 -p 80
>
> I get kernel panic:
> http://goo.gl/L6dCz6
>
> I'm using kernel v3.12.2 and iptables v1.4.21. Am I doing something wrong,
> or is it a bug?
You have to run this from the INPUT/FORWARD chain, SYNPROXY needs the
routing information to work.
next prev parent reply other threads:[~2013-12-08 10:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-08 7:16 ipt_SYNPROXY: kernel panic caused by nullpointer dereference Nicki P.
2013-12-08 10:01 ` Pablo Neira Ayuso [this message]
2013-12-08 16:52 ` Patrick McHardy
2013-12-11 10:33 ` Pablo Neira Ayuso
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=20131208100146.GA3840@localhost \
--to=pablo@netfilter.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=xastx@gmx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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;
as well as URLs for NNTP newsgroup(s).