Do I need PTR RRs?

[ccantu at us.ibm.com]

The printer has its own NIC, and there's no seperate print server because
the printer also has a hard drive for spooling jobs.  From your
description, and our printing methods, it would seem I could get away
without the PTR RR.  I might still have the DHCP server issue the PTR as
well as the A updates, but I'm a bit clearer as to what is "required" and
what is "nice to have".

Thanks.


---------------------- Forwarded by Carlos Cantu/Boulder/IBM on 08/02/2000
03:58 PM ---------------------------

"Vu Pham ( Sivell )" <vu at sivell.com>@isc.org on 08/02/2000 03:45:57 PM

Sent by:  bind-users-bounce at isc.org


To:   Carlos Cantu/Boulder/IBM at IBMUS
cc:   <bind-users at isc.org>
Subject:  Re: Do I need PTR RRs?





----- Original Message -----
From: <ccantu at us.ibm.com>
To: <bind-users at isc.org>
Sent: Wednesday, August 02, 2000 3:29 PM
Subject: Do I need PTR RRs?


>
> If I have a printer and everyone sets up their print queues using its IP
> address -- then if I have an A resource record for that printer, they'd
be
> able to use the printer's FQDN to set up the queues, right?  But I would
> have no use for a PTR RR unless I ever wanted to do an nslookup of that
> printer's IP address, right?  The questions:  Is there any significant
> disadvantage to not doing the PTR RRs in this case?  In what case would
the
> PTR RR be a necessity?
>
> Carlos
>
In my opinion, we will need the PTR RR for reverse lookup ( gethostbyaddr
).
If any app requires to have  reverse lookup for an IP, then you must have
the PTR RR for the host/device. For example, sendmail will refuse the relay
if it can not look for the name of an ip address.

If your print server just accepts connection from print client & does not
need to connect to any host , then the PTR RR may be unecessary.

Pls correct me.

Vu