Monday, February 25, 2013

TCP traceroute

Peteris Krumins posts on TCP Traceroute, a nifty trick to "see" through firewalls. His pudding:

# traceroute -T -p 80 www.microsoft.com
traceroute to www.microsoft.com (65.55.57.27), 30 hops max, 60 byte packets
 1  50.57.125.2 (50.57.125.2)  0.540 ms  0.629 ms  0.709 ms
 2  core1-aggr701a-3.ord1.rackspace.net (184.106.126.50)  0.486 ms  0.604 ms  0.691 ms
 3  corea.ord1.rackspace.net (184.106.126.128)  0.511 ms corea.ord1.rackspace.net (184.106.126.124)  0.564 ms  0.810 ms
 4  bbr1.ord1.rackspace.net (184.106.126.147)  1.339 ms  1.310 ms bbr1.ord1.rackspace.net (184.106.126.145)  1.307 ms
 5  chi-8075.msn.net (206.223.119.27)  3.619 ms  2.560 ms  2.528 ms
 6  * 204.152.140.35 (204.152.140.35)  3.640 ms *
 7  ge-7-0-0-0.co1-64c-1a.ntwk.msn.net (207.46.40.94)  52.523 ms xe-0-2-0-0.ch1-96c-2b.ntwk.msn.net (207.46.46.49)  3.825 ms xe-1-2-0-0.ch1-96c-2b.ntwk.msn.net (207.46.46.53)  3.355 ms
 8  xe-0-1-0-0.co1-96c-1a.ntwk.msn.net (207.46.33.177)  61.042 ms  61.032 ms  60.457 ms
 9  * * xe-5-2-0-0.co1-96c-1b.ntwk.msn.net (207.46.40.165)  100.069 ms
10  65.55.57.27 (65.55.57.27)  53.868 ms  53.038 ms  52.097 ms
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