From: "Glenn Griffin" <ggriffin.kernel@gmail.com>
To: netdev@vger.kernel.org
Subject: ipv6 syn cookie questions
Date: Thu, 17 Jan 2008 18:06:18 -0800 [thread overview]
Message-ID: <c9e534200801171806g23670a3eq37627bc875c2be59@mail.gmail.com> (raw)
In researching the linux implementation of syn cookies I stumbled on a few
points that aren't initially clear to me. I was hoping somehow could elaborate
and shed some light onto what I'm missing.
at net/ipv6/tcp_ipv6.c:1249 within tcp_v6_conn_request()
There is the following comment:
/*
* There are no SYN attacks on IPv6, yet...
*/
Also above that in the same file within tcp_v6_hnd_req() it looks like pieces
of an ipv6 syn cookie implementation were left but have been commented out.
I was not aware of ipv6 making any changes to how tcp behaved (ignoring obvious
details such as pseudo-header changes in checksum calculations, etc.), so the
comment above puzzles me. How does ipv6 change the viability of syn attacks
against tcp?
Also if anyone can provide any background that may exist on an ipv6
implementation of syn cookies that would be appreciated. I'm considering
working on an implementation, but would like to know if anyone is already
working on one or it's been submitted but deemed unnecessary for some reasons.
--Glenn
reply other threads:[~2008-01-18 2:06 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=c9e534200801171806g23670a3eq37627bc875c2be59@mail.gmail.com \
--to=ggriffin.kernel@gmail.com \
--cc=netdev@vger.kernel.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