0trace 0trace.sh is a shell script written by Michal Zalewski. It is a reconnaissance / firewall bypassing tool that enables hop enumeration ("traceroute") within an established TCP connection, such as a HTTP or SMTP session. This is opposed to sending stray packets, as traceroute-type tools usually do. In case of a successful scan, 0trace provides useful additional servers for the penetration tester. Project details 0trace is written in C, shell script. Usage Syntax Otrace iface target_ip [ target_port ] Strengths + The source code of this software is available Typical usage penetration test Description 0trace.py is a python port of Michal Zalewski's 0trace hop enumeration tool. 0trace was originally announced on Bugtraq on January 6th: I'd like to announce the availability of a free security reconnaissance / firewall bypassing tool called 0trace. This tool enables the user to perform hop enumeration ("traceroute")