You can also run bind as non-root (e.g. nobody) and chrooted to its own
little partition.  You can also prevent outside requests at the fire
wall by filtering on the ACK bit.  It's not much of a security risk that
way.

Performance wise, always use forwarders if you are running a caching
only server.  It's much faster that way.

Yan

Markus Stumpf wrote:
> 
> On Thu, Aug 12, 1999 at 02:13:50PM -0700, Russ Allbery wrote:
> ? Er... if it's handling a reasonably high volume of mail.  If it's only
> ? churning out a message or two every ten minutes, I wouldn't bother; BIND
> ? is a huge memory hog and also a program that tends to have to be
> ? frequently upgraded due to security holes.
> 
> We've come around this by configuring bind only to listen on 127.0.0.1
> and we've put
> ------------------------------------------------------------------------
> domain  space.net
> nameserver      127.0.0.1
> nameserver      195.30.0.2
> nameserver      195.30.0.1
> ------------------------------------------------------------------------
> into /etc/resolv.conf
> 
> This makes the bind running on the mailserver inaccessible from the
> outside and as there are only few trusted users on the mailhub exploits
> which use access/priviledge holes on the local filesystem are not
> really that big a problem.
> 
> Other than that I agree that a named on a very low volume mail server
> is not really needed.
> 
>         \Maex
> 
> --
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