On Sun, Jun 27, 2004 at 12:32:40AM +0100, Jonathan McDowell wrote:
Have just spent some time trying to track down what seemed to be an elusive problem, I thought I'd mention it here.
I've had problems accessing www.level3.net, www.ebay.co.uk and www.dabs.com (and a few others I don't recall). As I'm the first user of a reasonably new netblock I thought it might be something to do with filters on our upstreams or similar. Trying an IP from our older netblock worked without problems, which seemed to back this up.
However eventually I tracked it down to the use of the .0 address from the new netblock; changing to use the .1 address meant I could access the above sites without any difficulty.
Various people I've asked about this have said they wouldn't use the .0 or .255 addresses themselves, though couldn't present any concrete info about why not; my experience above would seem to suggest a reason not to use them.
This is what happens when your educational system continues to teach classful routing as anything other than a HISTORICAL FOOTNOTE *coughCiscocough*. This is also how you end up with 76k /24s in the global routing table. Do you part to help control the ignorant population: whenever you hear someone say "class [ABC]" in reference to anything other than a historical allocation, smack them. Hard. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)