[rescue] Re:OT LPR and 9100

James Rice jrice54 at vzavenue.net
Tue Sep 14 06:09:38 CDT 2004

PDL Datastream -


There are several port numbers that may be involved with printing.

Print Server Port Numbers 
<http://members.cruzio.com/%7Ejeffl/sco/lp/printservers.htm> is a useful 

The three main ones are LPD ("printer") on port 515 
<http://www.chebucto.ns.ca/%7Erakerman/port-table.html#lpd>, IPP on 631 
<http://www.chebucto.ns.ca/%7Erakerman/port-table.html#ipp>, and 
PDL-datastream on 9100 

Apple MacOS X Rendezvous Printing 
(PDF) will discover printers that are advertising their services. They 
give the example

For example, the Apple LaserWriter 8500 would register the following services,
assuming the default domain is "local."

Apple LaserWriter 8500._printer._tcp.local.        Port 515
Apple LaserWriter 8500._ipp._tcp.local.            Port 631
Apple LaserWriter 8500._pdl-datastream._tcp.local. Port 9100

>Apologize again -- this is off the topic of rescue but wishing to tap into the 
>braintrust here.
>Can someone explain to me the name of the "protocol" involved in printing to 
>port 9100, usually on an HP JetDirect?  I believe this has nothing at all to 
>do with LPR.

www.blackcube.org  The Texas State Home for Wayward and Orphaned Computers

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