dhcpd + named = ddns ?

[Cricket Liu]

> First the error message:
> Aug 26 12:46:25 paranoid dhcpd: if IN A insomniac.private.network
> rrset doesn't exist add 21600 IN A insomniac.private.network
> 192.168.1.3: no such domain.

That's actually not an error.  dhcpd is simply telling you what it's up to.
In this case, it's sending a dynamic update to your name server to add
an address record for insomniac.private.network, but only if that domain
name doesn't already have an address.

> paranoid is the name of the router box, insomniac is the name of the
> client in this case, 192.168.1.3 the IP dhcpd assigned insomniac.
> That's one big line that I can't quite decipher, it seems to say 'put
> something in your dns db' but also says something about a nonexistant
> domain.  First I need some deciphering as to what that means, then
> maybe how to fix it (though I should be able to figure it out from
> there).  Here are my config files (all from /etc/namedb, and
> dhcpd.conf from /etc):
> 
> paranoid# cd /etc/namedb
> paranoid# cat named.conf
> # $NetBSD: named.conf,v 1.6 2000/04/26 01:33:27 itojun Exp $
> 
> options {
>         directory "/etc/namedb";
>         version "nothing to see here, move along...";
>         listen-on { 192.168.1.254; 127.0.0.1; };
> 
>         forward first;
>         forwarders { 24.3.196.33; 24.3.196.34; };
> };
> 
> acl mynet {
>         192.168.1/24;
>         127.0.0.1;
> };
> 
> zone "." {
>         type hint;
>         file "root.cache";
> };
> 
> zone "127.IN-ADDR.ARPA" {
>         type master;
>         file "127";
> };
> 
> zone "private.network" {
>         notify no;
>         type master;
>         file "private.network";
>         allow-query { mynet; };
>         allow-update { mynet; };
>         allow-transfer { mynet; };
> };
> 
> zone "1.168.192.in-addr.arpa" {
>         notify no;
>         type master;
>         file "192.168.1";
> };

You probably want an allow-update substatement for this
zone, too, or else dhcpd won't be able to update the reverse
mapping for DHCP clients.

> paranoid# cat /etc/dhcpd.conf
> server-identifier paranoid.private.network;
> authoritative;
> 
> ddns-update-style ad-hoc;
> ddns-domainname "private.network";
> 
> dynamic-bootp-lease-length 604800;
> max-lease-time 1209600;
> 
> subnet 192.168.1.0 netmask 255.255.255.0 {
>   range 192.168.1.1 192.168.1.199;
>   option subnet-mask 255.255.255.0;
>   option broadcast-address 192.168.1.255;
>   option routers 192.168.1.254;
>   option domain-name-servers 192.168.1.254;
>   option domain-name "private.network";
> 
>   one-lease-per-client on;
> }

You didn't say which version of dhcpd you run, and I'm afraid I
don't keep up with DHCP stuff as well as I do DNS stuff, but my
ISC 3.0rc12 dhcpd is set up like I think you want and my dhcpd.conf
begins like this:

option domain-name "nxdomain.com";
ddns-rev-domainname "in-addr.arpa";
ddns-update-style interim;

cricket