[CLUE-Tech] dns example

[Mike]

On Wed, Jul 02, 2003 at 08:35:09PM -0600, Mike Staver wrote:
> Hello - I think I have a complicated question here, so here goes.  I have 
> a local DSL based network I'm trying to set up.  The local ip range is 
> 192.168.0.1 - 192.168.0.255.  I'm running the following services on one 
> box:
> 
> DNS Server
> Web Server
> Mail Server
> 
> I'm trying my best to figure out how to create a proper zone file that 
> makes all this work - my problem is the external ip, let's say 1.1.1.1 is 
> my external ip - I'm trying to figure out to get all the local machines 
> and all external machines to understand that I'm running a mail server, 
> and that all email going to whatever at newdomain.org should go to that 
> server.  I currently have port forwarding working flawlessly on my dsl 
> router, pointing all the right ports to 192.168.0.25 (my server).  I'm 
> going to register a domain name and have it pointed at my network, so I'm 
> assuming I tell Net Solutions to look to my new dns server at 1.1.1.1.  
> Somehow, I need my zone to work with the local ip range and external ip 
> happily.... here is what I have so far, and I don't think it's correct:
> 
> ----------------------------------------------------------
> ORIGIN .
> $TTL 3600       ; 1 hour
> newdomain.org          IN SOA  elway.oaks.newdomain.org. 
> administrator.oaks.newdomain.org. (
>                                 12         ; serial
>                                 900        ; refresh (15 minutes)
>                                 600        ; retry (10 minutes)
>                                 86400      ; expire (1 day)
>                                 3600       ; minimum (1 hour)
>                                 )
>                         NS      dns.newdomain.org.
>                         NS      elway.oaks.newdomain.org.
> $ORIGIN newdomain.org.
> dns                     A       1.1.1.1
> dsl                     A       1.1.1.1
> mail                    MX      5 1.1.1.1.
> elway.oaks              A       192.168.0.25
> www                     A       1.1.1.1
> ----------------------------------------------------------
> 
> Does anyone have an example of this kind of setup... has anyone been able 
> to successfully pull this off before?
> 
I've done this same setup at home. My ISP never asked for my domain
name. They only supplied the IP address. I registered my domain with
register.com and set the IP address in there DNS record to the IP
address assigned to me by my ISP. Additionally, I set aliases for mail
and www via register.com configuration.

This external IP is _not_ in any of my DNS configuration files. Also, be
sure you forward port 53 (nameserver).  

Here are my config files:

------------
---- named.conf
------------

options {
        directory "/var/bind";

        // uncomment the following lines to turn on DNS forwarding,
        // and change the forward ip address(es) :
        forward first;
        forwarders {
                xxx.xxx.xxx.xxx;
                x.x.x.x;
        };

        pid-file "/var/run/named/named.pid";
};

zone "." in {
        type hint;
        file "named.ca";
};

zone "mydomain.com" in {
        type master;
        file "pri/db.mydomain";
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "pri/127.0.0";
};

zone "0.168.192.in-addr.arpa" in {
        type master;
        file "pri/192.168.0";
};


------------
---- db.mydomain
------------

$TTL 3D
@               IN SOA          dns.mydomain.com.  hostmaster.mydomain.com. (
        1       ; serial
        8H      ; refresh
        2H      ; retry
        4W      ; expiry
        1D )    ; minimum

;
; name server
;
                IN NS           dns.mydomain.com.

;
; mail exchanger
;
                MX      10      dns.mydomain.com.

localhost       A       127.0.0.1
                MX      10      dns

host1           A       192.168.0.4
                MX      10      dns

dns             A       192.168.0.5
                MX      10      dns

host2           A       192.168.0.2
                MX      10      dns

mail            CNAME   dns
www             A       192.168.0.5


------------
---- 192.168.0
------------

$TTL 3D
@               IN SOA          dns.mydomain.com.  hostmaster.mydomain.com. (
                42              ; serial
                2D              ; refresh
                4H              ; retry
                6W              ; expiry
                1W)             ; minimum

                IN NS           dns.mydomain.com.


4               IN PTR          host1.mydomain.com.
5               IN PTR          dns.mydomain.com.

------------
---- 127.0.0
------------

$TTL 3D
@               IN SOA          dns.mydomain.com.  hostmaster.mydomain.com. (
                1               ; serial
                8H              ; refresh
                2H              ; retry
                4W              ; expiry
                1D )            ; minimum

                IN NS           dns.mydomain.com.
1               IN PTR          localhost.

Use these files as a template for your domain.  Set the "forwarders" to
the DNS servers of your ISP. Note that I have my DNS, mail, and web
server all on the same box. Which is what you wanted to do. Oh, and I
almost forgot (very important) you will also have to set your DSL
routers IP address to the address given to you by your ISP. And there is
more...lots of details...the DSL router address is 192.168.0.1. This
will also be your default route for your ethernet card. 

If you have any more questions, I'm out of town for the next two days
and will answer on Sunday. Good Luck! 

Mike