Connection problems

[James Wilkinson]

Paul F. Johnson wrote:
> Hi,
> 
> I currently get my broadband through Blueyonder in the UK. This goes
> from the cable modem into my router which then distributes around the
> house.
> 
> Since about 11pm on Thursday, I've had connection problems on the
> linux boxes (this email is via webmail on my RISC PC - which shows
> by virtue of being able to connect to my webmail account, there is
> nothing wrong with the router).
> 
> I'm getting this
> 
> If I use a terminal window and type
> 
> ping ahnews.music.salford.ac.uk
> 
> This appears
> 
> PING ahnews.music.salford.ac.uk (146.87.55.6) 56(84) bytes of data
> From 192.168.2.103 icmp_seq=0 Destination host unreachable
> 
> And that's it. The name has been correctly resolved, but nothing else
> is happening.

Try traceroute ahnews.music.salford.ac.uk

>From here on the Demon network, I get
 1  * * *
 2  thus10-hg3.kingston.broadband.bt.net (217.32.87.202)  94.640 ms  145.362 ms  170.685 ms
 3  217.32.87.161 (217.32.87.161)  149.214 ms  120.117 ms  95.296 ms
<snip>
13  gw-man.netnw.net.uk (194.66.25.98)  55.775 ms  95.335 ms  76.081 ms
14  hexie.memtech.salford.ac.uk (146.87.55.6)  141.959 ms  173.616 ms  116.503 ms
15  ahnews.music.salford.ac.uk (146.87.55.6)  29.146 ms  63.451 ms  31.836 ms

(I'm downloading stuff at the same time, so the packets are somewhat
delayed).

There are a couple of things to notice here. Note that stage 14 and 15
report the same IP address but with different hostnames. I'm not sure
how that's happening. It might point to oddities on the Salford network.

The first "hop" reports asterisks. This happens when the router is
configured not to respond to traceroute (as is the case here) or if the
packets are dropped before reaching their destination.

Can you also try traceroute news.bbc.co.uk to see if that is any
different? It would be interesting to see if you're just having problems
reaching some networks or all of them.

Hope this helps,

James.

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