[TriLUG] RoadRunner routing problem?

[Jeremy Portzer]

On Fri, 19 Nov 2004, Tom Bryan wrote:

> 
> I was surprised that while I can ping moya just fine, traceroute appears 
> unhappy.
> 
> ping -c 1 www.trilug.org
> PING moya.trilug.org (64.244.27.141) 56(84) bytes of data.
> 64 bytes from moya.trilug.org (64.244.27.141): icmp_seq=1 ttl=50 time=35.7 ms
> --- moya.trilug.org ping statistics ---
> 46.419 ms
> 16  64.244.31.43 (64.244.31.43)  34.883 ms  36.043 ms  35.010 ms
> 17  * * *
> 18  * * *
[etc]

Tom,

This just means that one of the routers/switches at Inflow is blocking 
traceroute packets from reaching moya, but allowing ping (echo request) 
packets.  I'm not sure exactly why it's configured this way, and we might 
be able to request a change, but it's not a big deal.  You'll find this is 
common on some networks as the network admins don't want you to be able to 
use traceroute to determine the structure of internal components of the 
network.  But allowing pings through is considered the neighborly thing to 
do, although some places don't even allow ping.

Also, the host in question that you can't get to home from RR, can you 
reach it from other places, like moya, or from work?  (I know you said 
someone else could reach it, but double-check it yourself.)

Hope this helps,
Jeremy
-- 
/---------------------------------------------------------------------\
| Jeremy Portzer        jeremyp at pobox.com      trilug.org/~jeremy     |
| GPG Fingerprint: 712D 77C7 AB2D 2130 989F  E135 6F9F F7BC CC1A 7B92 |
\---------------------------------------------------------------------/