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TCP traceroute
From NetSec
Revision as of 07:28, 6 December 2010 by WillieArce (Talk | contribs)
Overview
vs. UDP/ICMP
The problem with traceroutes nowdays is that most CPE and routing devices filter out unsolicited UDP packets, some even DROP the incoming packet so that it receives no icmp-port-unreachable reply, thus giving the famous * * *.
What you can do
Windows
mtr combines the functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.
As mtr starts, it investigates the network connection between the host mtr runs on and a user-specified destination host. After it determines the address of each network hop between the machines, it sends a sequence ICMP ECHO requests to each one to determine the quality of the link to each machine. As it does this, it prints running statistics about each machine.
Linux
Some distributions (including [gentoo]) allow you to run the traceroute command from the command line as follows:
traceroute -T -p 80 domain.tld
Same as above, only for Linux.
