Package tcptraceroute: Information

Danger alert: Package removed from branch sisyphus

Removed in the quest: #222169
Package removed: Dmitry V. Levin
Deletion date: Feb. 27, 2019
Message: replace_legacy_tcptraceroute_with_traceroute
Source package: tcptraceroute
Version: 1.5-alt5.qa1
Build time:  Jan 13, 2016, 04:40 AM
Category: Monitoring
Report package bug
License: GPL
Summary: A traceroute implementation using TCP packets
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.

It is worth noting that tcptraceroute never completely establishes a
TCP connection with the destination host.  If the host is not listening
for incoming connections, it will respond with an RST indicating that
the port is closed.  If the host instead responds with a SYN|ACK, the
port is known to be open, and an RST is sent by the kernel tcptraceroute
is running on to tear down the connection without completing three-way
handshake.  This is the same half-open scanning technique that nmap(1)
uses when passed the -sS flag.

List of rpms provided by this srpm:
tcptraceroute (x86_64, i586, aarch64)
tcptraceroute-debuginfo (x86_64, i586, aarch64)

Maintainer: Dmitry V. Levin

List of contributors:
Dmitry V. Levin
Dmitry V. Levin

    1. libcap-devel
    2. libnet2-devel
    3. libpcap-devel

Last changed

April 19, 2013 Dmitry V. Levin 1.5-alt5.qa1
- NMU: rebuilt for debuginfo.
April 12, 2007 Dmitry V. Levin 1.5-alt5
- Added summary to control script.
May 25, 2006 Dmitry V. Levin 1.5-alt4
- Deal with compilation warnings generated by new gcc compiler.