Does anyone have some good documents on the proper usage of reverse DNS PTR records?
There really aren't, as far as I know.
I am trying to reconcile the class C which is allocated to us but I don't know which hostname I am supposed to use in the PTR record.
The best advice that I have seen is to use the primary name, or whichever is most appropriate for that IP.
For example say I have an IP address 199.218.9.5. If all of these hostnames...
acme.com ftp.acme.com mail.acme.com ns1.acme.com www.acme.com
point to that same IP address, which one of them do use in the Reverse DNS?
In this case, you could pick whichever you wanted to use.
Is there some sort of order of precedence, e.g.
1. NS - If an IP is being used by a Name Server always use this as the hostname. 2. MAIL - If an IP is NOT being used by a Name Server but it is being used by a Mail Server use this hostname. 3. WWW - If an IP is NOT being used by a Name Server or Mail Server use this as the hostname. etc.
Is there a correct way of doing this? Or at least a standard convention?
There really isn't any convention, and is up to you to decide. Most reverse DNS entry lookups would likely be from mailservers, so mail.acme.com might be the best option (since if an end user sees www.acme.com, they might be confused).
-Scott
---
Declude JunkMail: The advanced anti-spam solution for IMail mailservers.
Declude Virus: Catches known viruses and is the leader in mailserver vulnerability detection.
Find out what you've been missing: Ask about our free 30-day evaluation.
--- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]
--- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
