topic Traceroute Problem in Operating System - HP-UX

Traceroute Problem

Nicky_5 — Thu, 31 Mar 2005 13:48:14 GMT

Hi,

I have an HP machine (hp 11.11) and a linux machine, both are in the same network with no firewall in between.
When i do traceroute Linux from the HP box it keeps timing out but the other way around (linux to hp) works fine.

I tried traceroute form HP box to another machine in same network (and subnet) and it works fine, its just this linux box that it keeps timing out..

Please advice...

Re: Traceroute Problem

RAC_1 — Thu, 31 Mar 2005 13:58:26 GMT

iptables on linux??
traceroute -d "linux"

Anil

Re: Traceroute Problem

Nicky_5 — Thu, 31 Mar 2005 14:22:53 GMT

hi,
traceroute -d linux also gives the same output:

traceroute -d persephone
traceroute to persephone.sbsint.com (12.20.194.27), 30 hops max, 40 byte packets
1 * * *
2 * * *
3 * * *

Re: Traceroute Problem

RAC_1 — Thu, 31 Mar 2005 15:15:45 GMT

How many nics on linux box??
Can you try another nic?? Also did you check if iptables in in play or not?? If yes, disable it for tests and do it. Also is there a firewall in between??

Anil

Re: Traceroute Problem

Nicky_5 — Thu, 31 Mar 2005 15:23:21 GMT

hi,

there are 2 NIC's i tried both, with same result.

iptables is not enabled on the linux machine.

i can traceroute from other machines to this linux box and also i can traceroute to other machines form HP.

Please advice

Re: Traceroute Problem

RAC_1 — Thu, 31 Mar 2005 15:41:34 GMT

How many nics on hp-ux??
traceroute - check options -i, -s

traceroute -v also. Is firewall in between?? Does linklookup work??

Anil

Re: Traceroute Problem

Nicky_5 — Thu, 31 Mar 2005 15:53:53 GMT

hi,

there is only one nic on the hp machines, i have tried the -d,w, v etc options with trace route but there is no difference in the output.
The strange part is that the hp machine and linux box can talk to each other.
When i do a ping on either of the 2 machines i get a response.

I dont understand this coz, both ping and traceroute sends ICMP packets, so why is one working and the other not??

Re: Traceroute Problem

Ron Kinner — Thu, 31 Mar 2005 16:03:57 GMT

Traceroute has been broken on HPUX since about 11.0. The current version ignores the route table and just grabs the first NIC (usually the builtin lan0). You can make it work by telling it which interface to use with the -i option. (assuming you can figure out how to specify the interface - expect it will use the same nomencalture as in netstat -rn) A better method is to use ping -o.

Ron

Re: Traceroute Problem

Nicky_5 — Thu, 31 Mar 2005 16:16:15 GMT

hi,

Thankyou for your reply.

I tried using traceroute -i lan0 but that did not work either.
The funny part is that if traceroute was broken of somehting it should not work for other machines either, but it does, when i do a traceroute to any other machine it goes throught perfectly..

is this something to do with linux machines?