Dns-operations mailing list

[Simon <simon AT hacknix.net>]

On 09/27/12 17:12, Jeff Taylor wrote:
> Wow that certainly IS odd.  If you ever find out what is going on with
> your ISP's lookups, I would be curious to know what they find.

I'll keep you updated.

> Meanwhile, you mentioned that you continue to get a single address
> returned for facebook.  This could potentially be due to caching on your
> server.  When I do a query, I also get the same IP returned every time. 
> However I have 5 different DNS servers running here, and if I query each
> machine directly, each one will return a different IP (but will continue
> to return the same IP after I have made the query).  To get a different
> answer, I have to restart bind9, then restart nscd, before my cache is
> completely cleared and I can get a new IP.

That's pretty much the conclusion I came too - other DNS services (like
google's) is actually many servers behind a laodbalancer, hence the
ability to serve different IPs.

Simon