"Non-existent host/domain"?

Re: "Non-existent host/domain"?

From:

Date:

Time:

Hmmm... I still get the error when I do an nslookup from within my
network. Outside the network, I don't get the error _unless_ I force
nslookup to use my network's primary name server.

--From within my network:

[Theressa-Lyonss-Computer:~] admin% nslookup mail.hastings.com
*** Can't find server name for address 216.253.208.2: Non-existent
host/domain
*** Can't find server name for address 192.168.0.2: Non-existent
host/domain
Server: zeus.espire.net
Address: 206.222.97.82

Name: mail.hastings.com
Address: 192.168.0.2

--and from outside my network (using my name server):

[B-W-G3:~] lsh% nslookup mail.hastings.com dns.hastings.com
*** Can't find server name for address 216.253.208.2: Non-existent
host/domain
*** Default servers are not available

It behaves (I think) as if I don't have a reverse entry for the name
server itself. But I do:
2.208.216.253.in-addr.arpa PTR mail.hastings.com

Possible ideas for causes (not solutions, though):

Both mail.hastings.com and dns.hastings.com have A records with
identical IP's. Since I have the mail server on the same machine as
the name server, the PTR record reflects the mail server's name (as
recommended).

Also, this server is behind a NAT router. The IP address actually
assigned to the name server is 192.168.0.2 (Gateway = 192.168.0.1, DNS
= 216.253.208.2). A static map on the NAT points 216.253.208.2 to
192.168.0.2.

Are either of these the source of my difficulty?

On Friday, Oct 4, 2002, at 06:29 US/Pacific, Len Conrad wrote:

>
>> For instance, when using nslookup:
>>
>> [B-W-G3:~] lsh% nslookup 216.253.208.52 dns.hastings.com
>> *** Can't find server name for address 216.253.208.2: Non-existent
>> host/domain
>> *** Default servers are not available
>
> dns.hastings.com is working fine Fri morning, 4 Oct
>
> lc1# dig -x 216.253.208.2 ptr
>
> ; <<>> DiG 9.2.1rc2 <<>> -x 216.253.208.2 ptr
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50148
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 1
>
> ;; QUESTION SECTION:
> ;2.208.253.216.in-addr.arpa. IN PTR
>
> ;; ANSWER SECTION:
> 2.208.253.216.in-addr.arpa. 86350 IN PTR mail.hastings.com.
>
>> What does this mean? How do I fix it?
>>
>> When I lookup the IP address of the server:
>>
>> [B-W-G3:~] lsh% nslookup 2.208.253.216.in-addr.arpa
>> Server: ns1.texas.rr.com
>> Address: 24.93.35.32
>>
>> *** No address (A) records available for 2.208.253.216.in-addr.arpa
>>
>> Huh? I don't have any A records in my in-addr.arpa zone. Do I need
>> them?
>>
>> We're having serious problems sending and receiving mail until this
>> is resolved. Help!
>
> lc1# nslookup -query=ptr 2.208.253.216.in-addr.arpa.
> lc1.sprocketdata.com
> Server: lc1.sprocketdata.com
> Address: 66.100.167.55
>
> Non-authoritative answer:
> 2.208.253.216.in-addr.arpa name = mail.hastings.com
>
> Authoritative answers can be found from:
> 208.253.216.in-addr.arpa nameserver = ns3.espire.net
> 208.253.216.in-addr.arpa nameserver = dns.hastings.com
> 208.253.216.in-addr.arpa nameserver = ns1.espire.net
> 208.253.216.in-addr.arpa nameserver = ns2.espire.net
> dns.hastings.com internet address = 216.253.208.2
>
> Len
>
>

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