Carlos Williams put forth on 12/1/2009 10:05 AM: > On Tue, Dec 1, 2009 at 10:43 AM, Ralf Hildebrandt > <ralf.hildebra...@charite.de> wrote: >> What is the output of traceroute 198.186.193.20 ? > > I get no results from my mail server: > > traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets > 1 * * * > 2 * * * > 3 * * * > 4 * * * > 5 * * * > . > . > . > 29 * * * > 30 * * * > > Strange...
Try: traceroute -N 1 198.186.193.20 Debian 5.0.3 traceroute defaults to 16 simultaneous probes. Other OSes may bulk up as well. I initially had the same problem as you. Using -N 1 sends one probe at a time, and works for me: greer:/etc/postfix# traceroute 198.186.193.20 traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets 1 . (192.168.100.1) 0.880 ms 1.143 ms 1.388 ms 2 mo-65-41-216-193.sta.embarqhsd.net (65.41.216.193) 36.706 ms 38.327 ms 40.772 ms 3 mo-69-68-110-209.sta.embarqhsd.net (69.68.110.209) 42.654 ms 45.076 ms 47.070 ms 4 (206.51.71.197) 80.981 ms 83.123 ms 84.785 ms 5 bb-dllstx37-jx9-02-xe-11-1-0.core.centurytel.net (206.51.69.25) 87.971 ms * * 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * * greer:/etc/postfix# traceroute -N 1 198.186.193.20 traceroute to 198.186.193.20 (198.186.193.20), 30 hops max, 40 byte packets 1 . (192.168.100.1) 0.503 ms 0.502 ms 0.463 ms 2 mo-65-41-216-193.sta.embarqhsd.net (65.41.216.193) 38.047 ms 35.821 ms 35.869 ms 3 mo-69-68-110-209.sta.embarqhsd.net (69.68.110.209) 35.522 ms 35.837 ms 35.682 ms 4 (206.51.71.197) 67.361 ms 66.997 ms 67.789 ms 5 bb-dllstx37-jx9-02-xe-11-1-0.core.centurytel.net (206.51.69.25) 68.497 ms 68.432 ms 67.764 ms 6 bb-dllstx37-jx9-01-ae0.core.centurytel.net (206.51.69.57) 67.016 ms 66.762 ms 72.675 ms 7 * * * 8 po3-30g.ar1.dfw1.us.nlayer.net (69.31.63.154) 69.074 ms 69.489 ms 69.022 ms 9 te4-1.ar1.iah1.us.nlayer.net (69.22.142.113) 73.907 ms 73.942 ms 74.405 ms 10 xe-2-2-0.cr1.atl1.us.nlayer.net (69.22.142.118) 73.474 ms 73.845 ms 74.193 ms 11 xe-0-1-0.cr2.iad1.us.nlayer.net (69.22.142.106) 79.535 ms 80.066 ms 80.077 ms 12 vl72.ar1.iad1.us.nlayer.net (69.31.31.158) 79.094 ms 80.838 ms 79.838 ms 13 as6450.vl134.ar1.iad1.us.nlayer.net (69.31.31.115) 79.145 ms 81.074 ms 80.578 ms 14 dns5.docforge.org (198.186.193.20) 80.306 ms !X 80.124 ms !X 81.516 ms !X man traceroute -N squeries Specifies the number of probe packets sent out simultaneously. Sending several probes concurrently can speed up traceroute considerably. The default value is 16. Note that some routers and hosts can use ICMP rate throttling. In such a situation specifying too large number can lead to loss of some responses. -- Stan
