Re: [cobalt-developers] Multiple Sites on 1 IP. PTR necessary for each domain??

["Ryan Verner" <vernerr@xxxxxxxxxxx>]

The whole point of a PTR record is reversing the IP to a hostname.

You can have many "A records".. that is, resolving many hostnames to the one
IP... but you are allowed only to have one PTR record per IP, hence its
point.  Try doing a lookup on both an IP and the hostnames of a box, you'll
see what I mean.

PTR records aren't even nessecary.

Also : do you actually _own_ the IP(s) that the cobalt is on?  If not, its
very likely your PTR records aren't even being queried, so it doesnt make
any difference what it is, or how many you have set in your DNS config.

Cobalt has a DNS FAQ on their site in PDF format, I'm not sure if it
discusses PTR records or not but I'd _strongly_ recommend reading it.  There
are many, many broken DNS servers out there.

Ryan.

--=--

:: Ryan Verner :: xfesty/irc.austnet.org ::
:: ICQ :: 76626240 ::
:: <xfesty@xxxxxxxxxxxxxxxxxxxxxxxxx> ::

----- Original Message -----
From: "Will Eberle" <will@xxxxxxxxxxxxxx>
To: <cobalt-developers@xxxxxxxxxxxxxxx>
Sent: Sunday, November 11, 2001 2:46 AM
Subject: RE: [cobalt-developers] Multiple Sites on 1 IP. PTR necessary for
each domain??


| I had the same question and asked it of AT&T Cobalt tech support. The
| response was that in their experience, many sites have PTR records for
each
| of up to 200 virtual domains per site/IP and, no worries.
|
| -----Original Message-----
| From: cobalt-developers-admin@xxxxxxxxxxxxxxx
| [mailto:cobalt-developers-admin@xxxxxxxxxxxxxxx]On Behalf Of [Dominik]
| Dominik
| Sent: Friday, November 09, 2001 9:34 AM
| To: cobalt-developers@xxxxxxxxxxxxxxx
| Subject: [cobalt-developers] Multiple Sites on 1 IP. PTR necessary for
each
| domain??
|
| Hi,
|
| i wonder if a PTR Record is necessary for each domain.
| i host all my sites on my raq via one ip adress....
| will i have to add ptr records for each domain?
|
| Thanks in Advance,
|
| Dominik
|
|
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