mirror of
https://git.FreeBSD.org/ports.git
synced 2024-11-26 00:55:14 +00:00
0d73d2ce8e
- give maintainership to submitter - make tcptraceroute setuid so users can use it - format pkg-descr better PR: 38911 Submitted by: Simon 'corecode' Schubert <corecode@corecode.ath.cx>
21 lines
1019 B
Plaintext
21 lines
1019 B
Plaintext
tcptraceroute is a 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.
|
|
|
|
WWW: http://michael.toren.net/code/tcptraceroute/
|
|
|
|
- Simon 'corecode' Schubert
|