# The net/tcptraceroute port

## tcptraceroute-1.5beta7p2 – traceroute implementation using TCP packets

## Description

    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.

WWW: http://michael.toren.net/code/tcptraceroute/

Categories:
  net

## Library dependencies

- net/libnet/1.1

## Build dependencies

- devel/gmake

## Run dependencies