Re: mu [OT]: dyn_dns and router ip address

From: Dave Houghton (
Date: Mon Nov 18 2002 - 22:45:34 CET

18/11/2002 20:35:19, Michele Andreoli <> wrote:

>On Mon, Nov 18, 2002 at 07:07:07PM -0000, Dave Houghton nicely wrote:
>> I'll have to stick with the web ip reflector for now although why supposedly intelligent Phd students can't
>> bookmark a URL beats me
>Dave, what happens when you ping the astrophysics server, from you
>Can you see its public IP or pinging is filtered?

I can ping the gateway router which is the one upstream of me at the Lovell telescope site at Jodrell Bank,
but only because I know the ip by using the web reflector. This ip would only be valid as long as the dhcp
lease renewal on this router returns the same ip address. As the we've got redundancy built in incase any
one of the network links fails this could change as any one of the 9 separate telescope sites could act as the
gateway router. If you don't know the ip you can't ping it :-(

It looks as though icmp packets are selectively filtered as traceroute just times out ( already considered
grepping the o/p from traceroute)

The sytem admin staff are not that helpfull, all proposals are, like booking telescope run time, done in
triplicate and months in advance, but I'm working on that one.


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