Static IP and fully qualified domain names

[Peter Ulrich Kruppa]

On Fri, 21 Nov 2003, Matthew Seaman wrote:

> On Fri, Nov 21, 2003 at 10:54:21AM -0500, Marty Landman wrote:
> > At 10:42 AM 11/21/2003, Cordula's Web wrote:
> > >>
> > >> From reading manuals one should think, that now I could give my
> > >> machines names like one.pukruppa.net, two.pukruppa.net, etc...
> > >> and all these would be reachable via internet - but they aren't.
> > >> The only one that can be accessed is pukruppa.net .
> > >
> > >You need to add A records (or CNAME records) to your DNS
> > >zone pukruppa.net:
> >
> > I'm a newbie faced with a similar (I think) problem; only in my case I'd
> > like to do the required DNS mapping on my intranet. Have no clue so plz be
> > gentle?
>
> On an intranet setting this sort of stuff up in the DNS is easy.
> Unless you have a particularly large and complicated setup, you don't
> need to bother with DNS delegation; neither do you need to worry about
> CIDR and other things that complicate life.
>
> Lets assume that the domain you're using in your intranet is
> 'example.com' and you've chose to use the 192.168.0.0/24 subnet for
> all of your IP numbering.
>
> You need to set up a machine as DNS server for your intranet.  In the
> named.conf file for that machine, configure it to be the authoritative
> server for the example.com. and 0.168.192.in-addr.arpa. zones by
> adding (inter alia):
>
>     acl localmachines {
>         127.0.0.1;
> 	192.168.0.0/24;
>     };
>
>     zone "example.com" in {
>         type master;
>         file "p/example.com";
>         allow-query {
>             localmachines;
>         };
>         allow-transfer {
>             none;
>         };
>         notify no;
>     };
>
>     zone "0.168.192.in-addr.arpa" in {
>         type master;
>         file "p/0.168.192.in-addr.arpa";
>         allow-query {
>             localmachines;
>         };
>         allow-transfer {
>             none;
>         };
>         notify no;
>     };
>
> where the zone data files might look something like this.
>
> example.com:
>
>     $TTL    3600
>
>     @       IN      SOA     ns0.example.com.     hostmaster.example.com. (
>                             2003112100      ; Serial
>                             10800           ; Refresh (3H)
>                             3600            ; Retry   (1H)
>                             604800          ; Expire  (1W)
>                             43200 )         ; Minimum (12H)
>                     NS      ns0
>                     MX      10 smtp
>     ;
>     localhost       A       127.0.0.1
>                     MX      10 smtp
>     ;
>     net             A       192.168.0.0
>                     MX      10 smtp
>     ;
>     ns0             A       192.168.0.1
>                     MX      10 smtp
>     ;
>     smtp            A       192.168.0.2
>                     MX      10 smtp
>     ;
>     foo             A       192.168.0.3
>                     MX      10 smtp
>     www-intra       CNAME   foo
>     ;
>     ;[...other data...]
>     ;
>     broadcast       A       192.168.0.255
>                     MX      10 smtp
>     ;
>     ; That's All Folks!
>     ;
>
> 0.168.192.in-addr.arpa:
>
>     $TTL    3600
>
>     @       IN      SOA     ns0.example.com.     hostmaster.example.com. (
>                             2003112100      ; Serial
>                             10800           ; Refresh (3H)
>                             3600            ; Retry   (1H)
>                             604800          ; Expire  (1W)
>                             43200 )         ; Minimum (12H)
>                     NS      ns0.example.com.
>     ;
>     0               PTR     net.example.com.
>     1               PTR     ns0.example.com.
>     2               PTR     smtp.example.com.
>     3               PTR     foo.example.com.
>     ;[...]
>     255             PTR     broadcast.example.com.
>     ;
>     ; That's All Folks!
>     ;
>
> Simple eh?  Actually, if all this is pretty much gibberish to you, I
> recommend getting hold of the Cricket book: "DNS and BIND", 4th Ed,
> P. Albitz and C. Liu, O'Reilly and associates, Sebastopol, CA. ISBN
> 0-596-00158-4 which will explain things with extreme lucidity.
I guess, I will have to do some reading.

Thanks,

Uli.

>
> 	Cheers,
>
> 	Matthew
>
> --
> Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
>                                                       Savill Way
> PGP: http://www.infracaninophile.co.uk/pgpkey         Marlow
> Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
>

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	|    Peter Ulrich Kruppa    |
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