On Sun, Mar 17, 2002 at 11:49:20AM +0000, Colin Fraser wrote:
> 
> Configured with BT HomeHighway a month or so ago. After much reading of docs 
> (and not a huge amount of understanding what I was doing!) I got bind working 
> on the server and masquerading working. Can browse, ftp, etc. quite happily 
> from my workstation. BUT - I can't get to java.sun.com. nslookup gives the 
> address  192.18.97.XX (the XX changes on each call)!

If all the other DNS-related suggestions don't work out for you, it's
always possible that your Linux distributions ships with Extended
Congestion Notification switched on.  I have noticed that prevents me
talking to *.sun.com.

To check if it's switched on, do:

cat /proc/sys/net/ipv4/tcp_ecn

If it's '1', it's switched on; '0', it's switched off.

If it is switched on, to turn it off, do:

echo 0 > /proc/sys/net/ipv4/tcp_ecn

OTOH, it's probably nothing to do with that.  I can't see any vendor
switching it on by default as it causes problems with too many
firewalls...
-- 
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