[TabTwo]

As a firewall-admin this comment really annoys me.

Heres why: Lots of calls from people complaining their application is not working because the network is broken. Look! at! this! traceroute! supporting! my! complaint!!!

Yeah, it is because udp from any to any is blocked on the firewall for good reasons while icmp traceroute is open. And be carefull because -I specifies the outgoint interface on some os, not the use of ICMP.

[sulandor]

most applications don't run over icmp so it is indeed sensible to not use it as a default.