Maxwell Smart wrote:
I have searched, but really don't know how to ask this question. I know
most on the list have been confronted with this. If anyone could point
me in the direction of the answer that would be sufficient.
I have a qmailtoaster that I just put into a co location facility. It
has rDNS pointed to it's domain name, as it's supposed to. How do I
setup my rDNS entries for mail clients on the server at that location?
Is there a way to use a PTR record that indicates that it's supposed to
resolve to colo.example.com?
What's the correct method of addressing this?
CJ
There's only one rDNS entry for a given IP address. That entry should be
a ptr record that points to (some other) type A record that hopefully
resolves to the same address which the rDNS entry has.
For example:
shu...@edwin:~$ dig doris.shubes.net
; <<>> DiG 9.4.2-P2 <<>> doris.shubes.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4288
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;doris.shubes.net. IN A
;; ANSWER SECTION:
doris.shubes.net. 592 IN A 174.17.83.232
;; Query time: 0 msec
;; SERVER: 192.168.70.253#53(192.168.70.253)
;; WHEN: Tue Nov 3 19:55:59 2009
;; MSG SIZE rcvd: 50
shu...@edwin:~$ dig -x 174.17.83.232
; <<>> DiG 9.4.2-P2 <<>> -x 174.17.83.232
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38386
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;232.83.17.174.in-addr.arpa. IN PTR
;; ANSWER SECTION:
232.83.17.174.in-addr.arpa. 43031 IN PTR 174-17-83-232.phnx.qwest.net.
;; Query time: 0 msec
;; SERVER: 192.168.70.253#53(192.168.70.253)
;; WHEN: Tue Nov 3 19:56:38 2009
;; MSG SIZE rcvd: 86
shu...@edwin:~$ dig 174-17-83-232.phnx.qwest.net
; <<>> DiG 9.4.2-P2 <<>> 174-17-83-232.phnx.qwest.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59486
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;174-17-83-232.phnx.qwest.net. IN A
;; ANSWER SECTION:
174-17-83-232.phnx.qwest.net. 43010 IN A 174.17.83.232
;; Query time: 0 msec
;; SERVER: 192.168.70.253#53(192.168.70.253)
;; WHEN: Tue Nov 3 19:57:18 2009
;; MSG SIZE rcvd: 62
shu...@edwin:~$
HTH
--
-Eric 'shubes'
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