Rev DNS problem

Dermot Paikkos dermot at sciencephoto.co.uk
Wed Feb 9 19:42:44 UTC 2005


Hi,

BIND 8.3 on tru64.

I thought my DNS was working fine until I got a mail rejection because my revdns was 
failing. True enough most server's can't resolve any of my ips but can work with the 
host names. What is strange is that nslookup seems to says its working while dig says 
my in-addr.arpa is non-existent.

EG:
>nslookup 194.200.237.129
Server:  localhost
Address:  127.0.0.1

Name:    helios.sciencephoto.co.uk
Address:  194.200.237.129

>dig 194.200.237.129
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 2
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

I have pawed through my config and I can't see an error - althought there my be one 
somewhere - so I am lost.

Debug suggests all is well with the revdns:

db_load(hosts.rev, 237.200.194.in-addr.arpa, 5, Nil, Normal)
d='237.200.194.in-addr.arpa', c=1, t=6, ttl=10800, data='helios.sciencephoto.co.uk.'
d='237.200.194.in-addr.arpa', c=1, t=2, ttl=10800, data='helios.sciencephoto.co.uk.'

so I guess the config file is okay. The zone file looks fine too. 
$TTL 3h
;
; Data file for reverse address to hostname for 237.200.194.in-addr.arpa
;
@  IN   SOA     helios.sciencephoto.co.uk.  (
                        200502090 ; Serial
                        28800   ; Refresh - 8 hours
                        7200    ; Retry - 2 hours
                        864000  ; Expire - 10 days
                        86400 ) ; Minimum - one day
        IN      NS      helios.sciencephoto.co.uk.
        IN      NS      ns0.pipex.net.
        IN      NS      ns1.pipex.net.
        IN      NS      nemesis.sciencephoto.co.uk.
129                             IN      PTR     helios.sciencephoto.co.uk.
...snip

Does anyone have any idea what else I can try. I have exhusted my toolset on this and 
haven't got a clue what to try next.
Thanx.
Dp.




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