Re: BIND bindings

[Darren Reed <darrenr () reed wattle id au>]

In some email I received from Charles Kaplan, sie wrote:
> Perhaps I am just looking at this the wrong way, but can anyone think of a
> way to run multiple instances of BIND on a multi homed box and have one
> version of BIND bind to each interface ?
>
> IE I want to build a tri-homed box with 3 separate/distinct DNS servers
> running on it, one on each interface.
>
> I can't believe that I am the first person who wants to do this, yet I
> can't find anything like this in the man pages, DNS/BIND book, etc..

BIND 8 supports this "out of the box" with the new configuration file
syntax for named.conf.  From the html docs:

Interfaces

The interfaces and ports that the server will answer queries from may be specified using the listen-on option.
listen-on takes an optional port, and an address_match_list. The server will listen on all interfaces allowed by
the address match list. If a port is not specified, port 53 will be used. 

Multiple listen-on statements are allowed. For example, 

    listen-on { 5.6.7.8; };
    listen-on port 1234 { !1.2.3.4; 1.2/16; };

Darren