Linux Netfilter discussions
 help / color / mirror / Atom feed
From: "Josh Berry" <josh.berry@linknet-solutions.com>
To: "Jee J.Z." <jz105@york.ac.uk>
Cc: netfilter@lists.netfilter.org
Subject: Re: Modify packets using netfilter
Date: Sun, 14 Dec 2003 19:14:02 -0600 (CST)	[thread overview]
Message-ID: <1208.192.168.111.202.1071450842.squirrel@mail.linknet-solutions.com> (raw)
In-Reply-To: <007d01c3c198$873df440$cb0210ac@jz105>

Snort-Inline is able to do this: http://snort-inline.sourceforge.net.  You
can have it modify (it calls it replacing) packets.  The main caveat to
this is that you have to replace data with the same amount of data
example:

Replacing the string "hacker" with "hack" would not work.

> Hi Antony and all,
>
> Thanks for your reply. What I am trying to do is to get the whole packets
> including their payloads and store them into a self defined queue, and
> randomly modify some bits in each packet. I am using iptables userspace
> programming. Does anybody have some good idea how to achieve this? Thank
> you.
>
> Regards,
> Jee


Thanks,
Josh Berry, CTO
LinkNet-Solutions
469-831-8543
josh.berry@linknet-solutions.com



      parent reply	other threads:[~2003-12-15  1:14 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-13 15:44 Modify packets using netfilter Jee J.Z.
2003-12-13 15:49 ` Antony Stone
2003-12-13 16:45   ` Jee J.Z.
2003-12-13 16:53     ` Antony Stone
2003-12-13 20:21     ` Eric Leblond
2003-12-13 23:11       ` Jee J.Z.
2003-12-15  1:14     ` Josh Berry [this message]

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=1208.192.168.111.202.1071450842.squirrel@mail.linknet-solutions.com \
    --to=josh.berry@linknet-solutions.com \
    --cc=jz105@york.ac.uk \
    --cc=netfilter@lists.netfilter.org \
    /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