SBDavid
Oct 26th, 2011
Oct 26th, 2011
Traceroute overview
Traceroute overview
Traceroute is a system administrators utility to trace the route IP packets take from a source system to some destination system.
Traceroute uses the IP TTL (Time To Live) parameter to find the route. It sends a packet with a TTL value equal to 1. The first router receives the packet and decreases the TTL. With a TTL equal to 0, the router sends a timeout back to traceroute, with this packet, traceroute knows about the first router. Now, traceroute sends another packet with a TTL equal to 2. The first router decreases the TTL and sends the packet to the second router which decreases it in turn: the TTL is equal to 0
Reference: http://traceroute.sourceforge.net/
