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traceroute, difference between Linux and Windows August 18, 2010

Posted by ZoeL in Cisco, Desktop PC, Notes.
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What is the difference of  “traceroute” between Windows and Linux?.

Never met one until recently, our DNS server failed. And during troubleshooting session we tried to trace the path. I already open icmp ports (host-unreachable and time-exceed) on our firewall. But strangely, we were not able to trace from linux machines. Different result achieved if we tried it from windows machines, traceroute running okay.

Googled it, and found the fact :

Windows uses ICMP, whilst  Linux use random high UDP port number.

i test it on our firewall, open all high UDP port number, and voila… now our Linux server able to “traceroute” traverse Firewall machine.

.end of notes.

Comments»

1. zainuddin - October 7, 2010

very usefull stuff


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