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-   -   How to format DNS PTR record ? (http://www.linuxquestions.org/questions/linux-networking-3/how-to-format-dns-ptr-record-200183/)

pcom 07-01-2004 11:37 PM

How to format DNS PTR record ?
 
We have been told by AOL that our email to it
is blocked because we do not have a reverse record
defined.

We defined it - but it seems incorrectly ?

When we check with dnsstuff.com it says:
"No PTR record defined".

Can someone who is a DNS export please help
with this ?

-> Thank you so very much !


in file: /etc/named.conf
======================================
zone "pcom.com" {
type master;
file "pcom.com.hosts";
};
zone "8.48.51.64.in-addr.arpa"{
type master;
file "/var/named/8.48.51.64.rev";
};


in file: pcom.com.hosts:
======================================
$TTL 38400
pcom.com. IN SOA ns1.pcom.com. hostmaster.pcom.com. (
200205058 ;
10800 ;
3600 ;
604800 ;
86400 ) ;

pcom.com. IN NS ns1.pcom.com.
pcom.com. IN NS ns2.pcom.com.

localhost.pcom.com. IN A 127.0.0.1
mail.pcom.com. IN A 64.51.48.8
pcom.com. IN MX 10 mail.pcom.com.
ns1.pcom.com. IN A 64.51.48.8


in file:
======================================
$TTL 38400
8.48.51.64.in-addr.arpa. IN SOA ns1.pcom.com. hostmaster.pcom.com. (
2004062901
10800
3600
604800
38400 )
8.48.51.64.in-addr.arpa. IN NS ns1.pcom.com.
9.48.51.64.in-addr.arpa. IN NS ns2.pcom.com.

8.48.51.64.in-addr.arpa. IN PTR ns1.pcom.com.
8.48.51.64.in-addr.arpa. IN PTR lin.pcom.com.
8.48.51.64.in-addr.arpa. IN PTR mail.pcom.com.

ppuru 07-01-2004 11:55 PM

Are you pcom.com or just using it as an example?

PCOM shows a different ipaddress when looked up... it is not 64.51.x.x

You will also need to request your ISP to set the PTR record for your subnet.

pcom 07-01-2004 11:59 PM

yes, pcom is just an example of what we are using. The format of the records are exactly like that though...the numbers and names have been changed to protect the innocent... :-)

We co-locate our server and so you are saying that we have to approach our ISP even though we are running our own DNS server for the domains we host...but I did notice that the main IP addr has a reverse entry that points back to the ISP - of course they own the whole block...


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