Reverse DNS problems

[John Emery]

Cheers,

I'm not entirely sure I understand your hints completely, but they did 
lead me down the right path.  I think I've got the issue resolved.  The 
mail host I've been having trouble sending mail to due to this reverse 
DNS issue, is accepting mail from OUR mail host now.

I'm still battling with my ISP over whos responsibility it is to remove 
that defunct server from the reverse list.

What I don't understand is, how do I get network solutions to remove 
this host?  I know / understand how to administer a "normal" domain, 
i.e. suemills.com... I don't quite see from network solutions web site 
how to administer a reverse domain.

Thanks very much!

John

Mark Andrews wrote:
>>I'm trying to figure out why I can't modify the host lookup for our 
>>primary mail server.  I have a revserse lookup file.  Any machine 
>>pointing to our primary DNS server can do a reverse lookup on the mail 
>>server:
>>
>># dig -x 206.135.171.3
>>
>>; <<>> DiG 9.2.2 <<>> -x 206.135.171.3
>>;; global options:  printcmd
>>;; Got answer:
>>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61947
>>;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
>>
>>;; QUESTION SECTION:
>>;3.171.135.206.in-addr.arpa.    IN      PTR
>>
>>;; ANSWER SECTION:
>>3.171.135.206.in-addr.arpa. 10800 IN    PTR     radon.suemills.com.
>>
>>;; AUTHORITY SECTION:
>>171.135.206.in-addr.arpa. 10800 IN      NS      hydrogen.suemills.com.
>>
>>;; ADDITIONAL SECTION:
>>hydrogen.suemills.com.  86400   IN      A       206.135.171.2
>>
>>;; Query time: 2 msec
>>;; SERVER: 206.135.171.2#53(206.135.171.2)
>>;; WHEN: Wed Mar 17 16:27:43 2004
>>;; MSG SIZE  rcvd: 139
>>
>>#
>>
>>You'll notice that the Answer section gives "radon.suemills.com"
>>
>>But, if I use an outside DNS server:
>>
>># dig @205.214.45.6 -x 206.135.171.3
>>
>>; <<>> DiG 9.2.2 <<>> @205.214.45.6 -x 206.135.171.3
>>;; global options:  printcmd
>>;; Got answer:
>>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3955
>>;; flags: qr rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
>>
>>;; QUESTION SECTION:
>>;3.171.135.206.in-addr.arpa.    IN      PTR
>>
>>;; ANSWER SECTION:
>>3.171.135.206.in-addr.arpa. 14400 IN    CNAME 
>>3.0-26.171.135.206.in-addr.arpa.
>>
>>;; AUTHORITY SECTION:
>>0-26.171.135.206.in-addr.arpa. 14400 IN NS      horogw.suemills.com.
>>0-26.171.135.206.in-addr.arpa. 14400 IN NS      hydrogen.suemills.com.
>>
>>;; ADDITIONAL SECTION:
>>horogw.suemills.com.    67869   IN      A       64.218.226.140
>>hydrogen.suemills.com.  67869   IN      A       206.135.171.2
>>
>>;; Query time: 76 msec
>>;; SERVER: 205.214.45.6#53(205.214.45.6)
>>;; WHEN: Wed Mar 17 16:29:06 2004
>>;; MSG SIZE  rcvd: 153
>>
>>#
>>
>>The Answer section gives "3.0-26.171.135.206.in-addr.arpa." as the host 
>>name.
> 
> 
> 	This is a RFC 2317 style delegation.
> 
> 	Rename your 171.135.206.in-addr.arpa zone to be
> 	0-26.171.135.206.in-addr.arpa.  You may need to
> 	fix zone contents.
> 
> 	Become a slave for 171.135.206.in-addr.arpa.
>  
> 
>>I'm having trouble sendin email out from this machine, to some domains, 
>>as they require a valid reverse host lookup.
>>
>>I called our ISP, and they say, the reverse authority has been deligated 
>>to our primary DNS servers.  If I need anything changed, in the reverse 
>>zone, that is of course, my responsibility.  AND, if I need any reverse 
>>lookup, authoritative DNS servers removed, or updated then I need to 
>>contact network solutions to do this.  My ISP won't help past this point.
>>
>>If you notice, the "Additional Section" in the output of the second dig 
>>command there are 2 NS servers listed; horogw, and hydrogen.suemills.com.
>>
>>Well, horogw is no longer a valid host, nor is the IP one of ours. 
>>Since I can't think of anything else, seems to me that having this 
>>invalid host in the list could be causing the problem.
> 
> 
> 	You need to get the host record removed.  You need to
> 	contact your registrar, Network Solutions, to do this.
> 
> horogw.suemills.com.    172800  IN      A       64.218.226.140
> suemills.com.           172800  IN      NS      horogw.suemills.com.
> suemills.com.           172800  IN      NS      hydrogen.suemills.com.
> ;; Received 122 bytes from 192.5.6.30#53(A.GTLD-SERVERS.NET) in 243 ms
> 
> 
> 
>>So, how do I get this host removed from the list?  How do add a new host 
>>name and IP to replace it as a backup?  Could this be causing my reverse 
>>lookup problems?
>>
>>Thanks in advance for reading and, hopefully responding to this posting.
>>
>>John Emery
>>
> 
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org
>