Do I need PTR RRs?
Vu Pham ( Sivell )
vu at sivell.com
Wed Aug 2 21:45:57 UTC 2000
----- 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
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