[106795] in North American Network Operators' Group
Re: Traceroute and random UDP ports
daemon@ATHENA.MIT.EDU (Matthew Luckie)
Wed Aug 13 15:29:29 2008
Date: Thu, 14 Aug 2008 07:29:15 +1200
From: Matthew Luckie <mjl@luckie.org.nz>
To: nanog@nanog.org
In-Reply-To: <5889714C-92DC-4020-9559-975D13DC23CB@ca.afilias.info>
Errors-To: nanog-bounces@nanog.org
These days there are better implementations of traceroute that are less
likely to infer false IP paths by not playing games with the source and
destination ports.
www.paris-traceroute.net
Paris traceroute hacks the payload of the UDP probe to use the checksum
field as the probe identifier (and also uses the IPID field as a backup
since NATs will change the checksum). Paris traceroute also has an ICMP
mode.
