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[ Source: tcptraceroute  ]

Package: tcptraceroute (1.5beta7+debian-4)

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traceroute implementation using TCP packets

The more traditional traceroute(8) sends out either UDP or ICMP ECHO packets with a TTL of one, and increments the TTL until the destination has been reached. By printing the gateways that generate ICMP time exceeded messages along the way, it is able to determine the path packets are taking to reach the destination.

The problem is that with the widespread use of firewalls on the modern Internet, many of the packets that traceroute(8) sends out end up being filtered, making it impossible to completely trace the path to the destination. However, in many cases, these firewalls will permit inbound TCP packets to specific ports that hosts sitting behind the firewall are listening for connections on. By sending out TCP SYN packets instead of UDP or ICMP ECHO packets, tcptraceroute is able to bypass the most common firewall filters.

Tags: Implemented in: C, User Interface: Command Line, Network Protocol: IP, protocol::tcp, role::program, Scope: Utility, Purpose: use::checking, works-with::network-traffic

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Download for all available architectures
Architecture Package Size Installed Size Files
s390x 32.8 kB104.0 kB [list of files]