[TriLUG] OT: DSL for SOHO in Chapel Hill

[Jon Carnes]

A /29 gives you 6 usable IP addresses - one must be used for the
gateway, so that leave 5 for other purposes.  To setup a Domain, you're
supposed to give the Internic two separate IP addresses - One for your
Primary DNS, the Second for you Secondary DNS server.

I also like to isolate my mail servers from my other functional servers
as mail servers (by their nature) are open to all sorts of denial of
service or flooding attacks.

So for me, a /29 is perfect to run a simple secure Domain.

To setup a DNS as the primary you simply have to tell it in
/etc/named.conf (for BIND) that this server is the primary for this
zone. To setup a DNS as the secondary for a zone, you setup the zone in
named.conf as a secondary and point it to the Primary (or Master).

On a Primary, you have to setup two zone files - the ordinary zone file
and the reverse lookup.  If you are running your domain in /29 then the
odds are that your ISP runs the reverse zone file and you have to feed
them the proper reverse look-ups for your IP range. The ordinary zone
file maps domain names to local IP addresses.

On a secondary, all the files are created automagically after the DNS
server contacts the Primary Domain Server and transfers the zone
information to a local cache file.

Jon Carnes

On Mon, 2004-01-26 at 19:43, Jim Ray wrote:
> So, what's involved in setting it up?  Don't you have to use two IPs for
> primary and secondary and do some kinda zone transfer thingie?
> 
> Once you set it up, isn't it possible to host your own domain names?
> 
> -----Original Message-----
> From: Jon Carnes [mailto:jonc at nc.rr.com] 
> Sent: Monday, January 26, 2004 7:37 PM
> To: Jim Ray; Triangle Linux Users Group discussion list
> Subject: RE: [TriLUG] OT: DSL for SOHO in Chapel Hill
> 
> 
> Redundant DNS.
> 
> On Mon, 2004-01-26 at 19:30, Jim Ray wrote:
> > What can you do with a /29 that you can't do with a single static and 
> > port forwarding?
>