DNS Problem

crazee64 · 07-12-2006, 12:31 AM

Hi All,

My problem is simple - I have a server on my LAN running named and using that machine I can resolve names to addresses on my local LAN and outside, and resolve outside IP's back to names. But I cannot resolve IP's in the range 192.168.0.X back to names on the LAN:

Code:

[root@obelix named]# host asterix
asterix.doh.net.au has address 192.168.0.4

[root@obelix named]# host 192.168.0.4
Host 4.0.168.192.in-addr.arpa not found: 3(NXDOMAIN)

So I have a problem. I have tried debugging this for a while with no luck - usually this is not so hard but I'm stumped as to why this isn't working now. If anyone can help me I would be very grateful. My named.comf is nothing unusual:

Code:

[root@obelix named]# cat /etc/named.conf
options {
        directory "/var/named";
        dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        forwarders { 144.140.70.29; 144.140.71.29; };
};

controls {
        inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};

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

zone "localdomain" IN {
        type master;
        file "localdomain.zone";
        allow-update { none; };
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "doh.net.au" IN {
        type master;
        notify no;
        file "doh.zone";
        allow-update {none; };
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "localhost.rev";
        allow-update { none; };
};

zone "0.168.192.in-arpa" IN {
        type master;
        notify no;
        file "192.168.0.rev";
        allow-update {none; };
};

zone "255.in-addr.arpa" IN {
        type master;
        file "named.broadcast";
        allow-update { none; };
};

zone "0.in-addr.arpa" IN {
        type master;
        file "named.zero";
        allow-update { none; };
};

include "/etc/rndc.key";

And the relevant reverse zone file:

Code:

; Brian Grasby 08/07/2005
; Start of Authority (SOA) records
$TTL 345600
@       IN      SOA     obelix.doh.net.au. briang.doh.net.au. (
                        200607121 ; Serial
                        86400     ; Refresh
                        7200      ; Retry
                        2592000   ; Expire
                        345600 )  ; Minimum

; Nameserver (NS) records
                NS      obelix.doh.net.au.

; Reverse lookup pointers to names
2               PTR     travel-laptop.doh.net.au.
3               PTR     michelle.doh.net.au.
4               PTR     asterix.doh.net.au.
5               PTR     office.doh.net.au.
6               PTR     cacophonix.doh.net.au.
7               PTR     obelix.doh.net.au.
8               PTR     bryan.doh.net.au.

bathory · 07-12-2006, 02:57 AM

Quote:

zone "0.168.192.in-arpa" IN {

You have an error in your named.conf. The above line should be:

Code:

zone "0.168.192.in-addr.arpa" {

BTW you don't need tha "IN" when defining a zone

crazee64 · 07-12-2006, 04:32 AM

Now that is what happens when you stare at the same problem for too long! I can't believe I missed that

Thanks

I must have checked that line 10 times and assumed every time that it was the same as my other zones.

ashintoms · 07-12-2006, 04:26 PM

all the IN in the named.conf should be removed for the nslookup to
function

Regards
Ashish