Hello, All,
Does anyone have some good documents on the proper usage of reverse DNS PTR
records?  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.

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?
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?

Thanks, Much!
Dan Geiser <[EMAIL PROTECTED]>


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