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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