Reverse DNS not working for new server

dhottinger at harrisonburg.k12.va.us dhottinger at harrisonburg.k12.va.us
Mon Nov 27 12:10:56 UTC 2006


Thanks to all.  You have confirmed what I thought was the case.  I  
just needed a little confirmation before I call shentel to find out  
what has changed on their end.  In the past, I didnt have to contact  
them when I added new ip's to my zones.  A restart of named sent them  
the updates.

Quoting Mark Andrews <Mark_Andrews at isc.org>:

>
>> I added a new webmail server several weeks ago.  I made the pert. DNS
>> entries to the zone file and the reverse lookup file.  Within my
>> domain using my DNS servers everything resolves correctly.  When I do
>> an nslookup for 204.111.40.8 I get newproxy.harrisonburg.k12.va.us.
>> However, outside my domain I get
>> UnKnown can't find 204.111.40.10: Non-existent domain.  Now the rest
>> of my ip's resolve correctly.  Heres my zone file:
>>
>> $ORIGIN .
>> $TTL 259200     ; 3 days
>> harrisonburg.k12.va.us IN SOA ns1.harrisonburg.k12.va.us.
>> rlineweaver.harrisonburg.k12.va.us. (
>>                                  2006112601 ; serial
>>                                  28800      ; refresh (8 hours)
>>                                  7200       ; retry (2 hours)
>>                                  2419200    ; expire (4 weeks)
>>                                  86400      ; minimum (1 day)
>>                                  )
>>                                  NS      ns1.harrisonburg.k12.va.us.
>>                                  NS      ns2.harrisonburg.k12.va.us.
>> Heres the entry for newproxy:
>> newproxy                        A       204.111.40.10
>>
>> Heres my reverse dns file for this zone:
>> $ORIGIN .
>> $TTL 259200     ; 3 days
>> 40.111.204.in-addr.arpa         IN SOA  ns1.harrisonburg.k12.va.us.
>> rlineweaver.harrisonburg.k12.va.us. (
>>                                  2006112601  ; serial
>>                                  28800      ; refresh (8 hours)
>>                                  7200       ; retry (2 hours)
>>                                  2419200    ; expire (4 weeks)
>>                                  86400      ; minimum (1 day)
>>                                  )
>>                          NS      ns1.harrisonburg.k12.va.us.
>>                          NS      ns2.harrisonburg.k12.va.us.
>> Heres the entry for Newproxy in reverse dns
>> 10                      PTR     newproxy.harrisonburg.k12.va.us.
>>
>> Heres my named.conf spelling out my upstream dns notifiers:
>> options {
>>          directory "/var/named";
>>
>>          forward first;
>>          forwarders {
>>                  204.111.1.36;
>>                  204.111.1.35;
>>          };
>> Ive added several servers in the past with no issues.  Im using bind
>> 9.2.3.  I cant figure out why other servers arent getting the updates.
>>   Im not seeing any error's logged at all.
>>
>> thanks,
>>
>> ddh
>>
>> Network Administrator
>> Harrisonburg City Public Schools
>
> 	As has been said many time nslookup is not a good diagnotic
> 	tool.
>
> ; <<>> DiG 9.3.2-P2 <<>> -x 204.111.40.10
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 50451
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;10.40.111.204.in-addr.arpa.	IN	PTR
>
> ;; AUTHORITY SECTION:
> 40.111.204.in-addr.arpa. 10800	IN	SOA	ns.shentel.net.   
> dnszoneadmin.shentel.net. 2006032200 10800 3600 604800 172800
>
> ;; Query time: 234 msec
> ;; SERVER: 127.0.0.1#53(127.0.0.1)
> ;; WHEN: Mon Nov 27 14:04:01 2006
> ;; MSG SIZE  rcvd: 107
>
> 	Which shows the answer is not coming from the intance of
> 	the zone you thought it was.  You either need to also
> 	update the zone on ns.shentel.net or change the delegation
> 	to point to your servers.
>
> ; <<>> DiG 9.3.2-P2 <<>> +trace -x 204.111.40.10
> ;; global options:  printcmd
> .			38423	IN	NS	H.ROOT-SERVERS.NET.
> .			38423	IN	NS	M.ROOT-SERVERS.NET.
> .			38423	IN	NS	J.ROOT-SERVERS.NET.
> .			38423	IN	NS	G.ROOT-SERVERS.NET.
> .			38423	IN	NS	F.ROOT-SERVERS.NET.
> .			38423	IN	NS	I.ROOT-SERVERS.NET.
> .			38423	IN	NS	E.ROOT-SERVERS.NET.
> .			38423	IN	NS	A.ROOT-SERVERS.NET.
> .			38423	IN	NS	L.ROOT-SERVERS.NET.
> .			38423	IN	NS	B.ROOT-SERVERS.NET.
> .			38423	IN	NS	D.ROOT-SERVERS.NET.
> .			38423	IN	NS	K.ROOT-SERVERS.NET.
> .			38423	IN	NS	C.ROOT-SERVERS.NET.
> ;; Received 464 bytes from 127.0.0.1#53(127.0.0.1) in 2 ms
>
> 204.in-addr.arpa.	86400	IN	NS	chia.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	dill.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	basil.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	henna.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	indigo.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	epazote.arin.net.
> 204.in-addr.arpa.	86400	IN	NS	figwort.arin.net.
> ;; Received 195 bytes from   
> 2001:500:1::803f:235#53(H.ROOT-SERVERS.NET) in 338 ms
>
> 111.204.in-addr.arpa.	86400	IN	NS	ns2.shentel.net.
> 111.204.in-addr.arpa.	86400	IN	NS	ns.shentel.net.
> ;; Received 90 bytes from 2001:440:2000:1::21#53(chia.arin.net) in 660 ms
>
> 40.111.204.in-addr.arpa. 86400	IN	SOA	ns.shentel.net.   
> dnszoneadmin.shentel.net. 2006032200 10800 3600 604800 172800
> ;; Received 107 bytes from 204.111.1.36#53(ns2.shentel.net) in 231 ms
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org
>



-- 
Dwayne Hottinger
Network Administrator
Harrisonburg City Public Schools



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