In article <20051103220257.GC7571@frohike.nvie.com>,
Peter Bex  <Peter.Bex@student.ru.nl> wrote:
>-=-=-=-=-=-
>
>Hi list,
>
>My server runs dhcpd and lpd.  Printing works from a (NetBSD) desktop with
>a static IP and matching line in /etc/hosts.
>
>Now I would like to print from a (OS X) laptop with dynamic IP to the
>server.  I don't get an error or output, and when I post my first job, lpq
>tells me that the printer is not ready.  When I telnet to port 515 from the
>laptop, I get the following error:
>/usr/sbin/lpd: Host name for your address (192.168.0.64) unknown
>
>After a bit of googling, I found out that lpd requires a reverse DNS lookup
>to resolve correctly before it will allow a host to print.  (this is not
>documented in the lpd manpage)  And indeed, assigning a static IP to the
>machine with a hostname in /etc/hosts fixes the problem.
>
>Is there a way to make lpd and dhcpd play nice together so arbitrary hosts
>can be added to the network and allowed to print?  (WITHOUT installing CUPS
>or LPRng)
>
>Why does it require a DNS lookup to work correctly?  It would appear to me
>that this could rather easily be spoofed anyway.

Well, you can add forward and reverse entries to your dns such as

64	IN	PTR 	dyn64.foo.bar.

dyn64	IN	A	192.168.0.64

or use DDNS

christos