2 Basic BIND questions...
barmar at alum.mit.edu
Thu Jun 2 00:49:48 UTC 2005
In article <d7iai0$279n$1 at sf1.isc.org>, msis at bombersman.com wrote:
> G'day all,
> I have two questions regarding configuration for bind 9. I want to be
> able to alias an outside host using bind. In my hosts file i have this:
> 220.127.116.11 server server.domainexternal.com
> My domain however is inside my local network, whereas domain external
> is on the internet. I would just like to know where to put an alias for
> this server in my DNS configuration so that it has the same
> functionality as the hosts file.
Make your server authoritative for the zone named
"server.domainexternal.com", and put an A record in that zone file.
> Secondly, i was wondering if there was a way to override the TTL that
> websites have for thier DNS records, i.e. google.com may have a 500
> second TTL, but that seems to be pretty quick and sort of negates the
> idea behind a caching nameserver. Is this possible?
No, and it's a bad idea. When someone sets their TTL low, it's because
they want to be able to change their records and have the changes
propagate quickly. This is necessary for high-availability services
that need to be able to fail over to alternate addresses. It's also a
common technique to use in preparation for an upcoming renumbering: set
the TTL low temporarily, so that when you make the changes the old
records will be flushed from caches quickly.
Barry Margolin, barmar at alum.mit.edu
*** PLEASE post questions in newsgroups, not directly to me ***
More information about the bind-users