[ Date Index ] [ Thread Index ] [ <= Previous by date / thread ] [ Next by date / thread => ]
On Thu, Mar 15, 2007 at 07:51:26AM +0000, Tom Potts wrote: > On Thursday 15 March 2007 07:28, Neil Stone wrote: > > Is someone able to shed light on why I am able to ping a specific host, > > but not traceroute to it ? > > > > I get 6 hops along the route and then it gives up.. > Not 100% sure but traceroute uses ICMP which can be used to discover lots and > lots about a network - so it would be sensible to 'disallow' it where thats > not needed so traceroute will stop there Try tcptraceroute instead? alan@colossus:~$ apt-cache search tcptraceroute tcptraceroute - A traceroute implementation using TCP packets alan@colossus:~$ tcptraceroute bishop.popey.com 25 Selected device eth0, address 192.168.129.4, port 48709 for outgoing packets Tracing the path to bishop.popey.com (212.13.194.80) on TCP port 25 (smtp), 30 hops max 1 192.168.129.11 0.470 ms 0.316 ms 0.312 ms 2 10.129.96.1 7.978 ms 10.634 ms 7.005 ms 3 glfd-t2cam1-a-v103.inet.ntl.com (80.4.30.13) 8.536 ms 12.326 ms 8.159 ms 4 glfd-t2core-a-ge-wan61.inet.ntl.com (195.182.175.241) 7.614 ms 11.591 ms 9.535 ms 5 gfd-bb-a-so-730-0.inet.ntl.com (213.105.174.153) 8.797 ms 8.069 ms 7.292 ms 6 pop-bb-b-so-010-0.inet.ntl.com (213.105.172.138) 9.931 ms 9.345 ms 9.647 ms 7 tele-ic-2-as0-0.inet.ntl.com (62.253.184.6) 9.843 ms 9.655 ms 10.119 ms 8 ldn-s2-rou-1002.uk.eurorings.net (195.66.224.54) 20.843 ms 20.321 ms 19.748 ms 9 ldn-s2-rou-1022.uk.eurorings.net (134.222.231.225) 21.908 ms 20.352 ms 28.559 ms 10 134.222.230.122 21.777 ms 21.177 ms 23.723 ms 11 ldn-s2-rou-1002.uk.eurorings.net (134.222.231.62) 21.436 ms 19.892 ms 19.783 ms 12 kpn-gw-sup-tfm1.jump.net.uk (194.153.169.236) 11.858 ms 11.376 ms 11.532 ms 13 bishop.popey.com (212.13.194.80) [open] 12.679 ms 11.895 ms 13.005 ms Cheers, Al. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html