traceroute-like Tools

Traceroute is used to determine the route a packet takes through the Internet to reach its destination; i.e. the sequence of gateways or "hops" it passes through. Since its inception, traceroute has been widely used for network diagnostics as well as for research in the widest sense.

The basic idea is to send out "probe" packets with artificially small TTL (time-to-live) values, eliciting ICMP "time exceeded" messages from routers in the network, and reconstructing the path from these messages. This is described in more detail under the VanJacobsonTraceroute topic. This original traceroute implementation was followed by many attempts at improving on the idea in various directions: More useful output (often graphically enhanced, sometimes trying to map the route geographically), more detailed measurements along the path, faster operation for many targets ("topology discovery"), and more robustness in the face of packet filters, using different types of suitable probe packets.

Traceroute Variants

Close cousins

• "Van Jacobson" traceroute, also called "Unix" or "LBL" traceroute - the original.
• traceroute6 is basically just traceroute for IPv6.
• Solaris traceroute integrates IPv4 and IPv6 traceroute functionality.
• NANOG Traceroute is derived from the original Traceroute, but adds a few extensions such as AS number lookups, TOS change detection etc.
• Windows "tracert"

Variants with more filter-friendly probe packets

• TCP Traceroute and lft (Layer Four Traceroute) use TCP probe packets to traverse filters.
• traceproto and ETrace support various protocols (ICMP, UDP, TCP) for its probe packets.

Extensions

GUI (Graphical User Interface) traceroute variants

• 3d Traceroute plots per-hop RTTs over time in 3D. Works on Windows, free demo available
• LoriotPro graphical traceroute plugin. Several graphical representations.
• Path Analyzer Pro, graphical traceroute tool for Windows and MacOS X. Include "synopsis" feature.
• PingPlotter combines traceroute, ping and whois to collect data for Windows platform.
• VisualRoute performs traceroutes and provides various graphical representations and analysis. Runs on Windows, Web demo available.

More detailed measurements along the path

• mtr (Matt's TraceRoute) combines the functionality of the traceroute and ping programs in a single network diagnostic tool.
• SmokeTrace is a browser/server-based tool similar to mtr (see above). It is included in recent SmokePing distributions.
• pathping, included in Microsoft Windows
• Traceroute Mesh Server draws a map from traceroutes from multiple servers to a single address.
• tracepath and tracepath6 show Path MTU Discovery information along a path.

Other

• Multicast Traceroute (mtrace) uses IGMP protocol extensions to allow "traceroute" functionality for multicast
• Paris Traceroute claims to produce better results in the presence of "multipath" routing.
• Scamper performs bulk measurements to large numbers of destinations, under configurable traffic limits.
• tracefilter tries to detect where along a path packets are filtered.
• traceiface tries to find "both ends" of each link traversed using expanding-ring search.
• Net::Traceroute::PurePerl is an implementation of traceroute in Perl that lends itself to experimentation.
• traceflow is a proposed protocol to trace the path for traffic of a specific 3/5-tuple and collect diagnostic information

Another list of traceroute variants, with a focus on (geo)graphical display capabilities, can be found on the JRA1 Wiki.

Traceroute Servers

There are many TracerouteServers on the Internet that allow running traceroute from other parts of the network.

-- FrancoisXavierAndreu - SimonMuyal - 06 Jun 2005
-- SimonLeinen - 06 May 2005 - 17 Aug 2008