From: Bill Bogstad <bogstad@pobox.com>
To: Pieter Smit <mlist2010@vigor.co.za>
Cc: Curby <curby@cur.by>, netfilter@vger.kernel.org
Subject: Re: Playing nice with incoming traceroutes
Date: Sat, 15 May 2010 23:17:07 -0400 [thread overview]
Message-ID: <AANLkTimrjdx9ADP8OpAMmaxC_kfr9Ua1T0auAW3M8M9q@mail.gmail.com> (raw)
In-Reply-To: <AANLkTilTF_pcF5W67BEAhKmNIzpffHhFByKLS2LX7bqy@mail.gmail.com>
On Sat, May 15, 2010 at 12:51 PM, Pieter Smit <mlist2010@vigor.co.za> wrote:
> You would send an ICMP time exceeded (type 11) packet if you receive a
> packet with a ttl=1 you will decrement it one realize it is 0 and send
> the ICMP time exceeded.
>
> Traceroute could also use ping ICMP echo request (type 8).
Or TCP SYN packets. From "man traceroute" on my Ubuntu system:
-I Use ICMP ECHO for probes
-T Use TCP SYN for probes
Actually the "LIST OF AVAILABLE METHODS" section is quite extensive.
Apparently people have been hacking
on traceroute while I wasn't watching.
Bill Bogstad
next prev parent reply other threads:[~2010-05-16 3:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-14 21:17 Playing nice with incoming traceroutes Curby
2010-05-15 16:51 ` Pieter Smit
2010-05-16 3:17 ` Bill Bogstad [this message]
2010-05-16 22:22 ` Pascal Hambourg
2010-05-16 21:00 ` Curby
2010-05-16 22:26 ` Pascal Hambourg
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