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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