RE: LPR from behind ISA server... The final chapter
- From: "Thomas W. Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 7 Sep 2001 14:28:34 -0500
Hi Jay,
Interesting! Do you think we'll ever someday, if we're really nice and
live a good life, get some sort of documentation on how exactly the
settings in the wspcfg.ini and mspclnt.ini work? Its amazing that no
where in the entire world is there a cogent discussion on how these
files actually work, and how to configure them. Someday I'm going to try
to figure it out, but there is likely someone that already fully
understands them and could write it off the top of his/her head.
I'd even pay a couple a hundred bucks to someone that could do this,
just because it represents such a black hole in my own personal
knowledge base.
Thanks for the follow up!
Tom
Thomas W Shinder, M.D., MCSE, MCT
-----Original Message-----
From: Jay J. Mobley [mailto:jmobley@xxxxxxxxxx]
Sent: Friday, September 07, 2001 12:27 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] LPR from behind ISA server... The final chapter
http://www.ISAserver.org
After much fussing with a client behind my ISA server that needs to
print to
a print server on the internet, Microsoft has told me that this can
not be done without coding a custom application filter via the SDK.
The problem is:
LPR RFC requires that the print request be initiated from ports ranging
from 721-731 (not to be confused with subsequent connections) if the
print job comes from any other port the print server rejects the request
with the comment "malformed from address"
since the ISA server is preforming NAT fucntions on the request that
initiates from the inside, it doesn't know that the initiating port is
significant, and sends it out an epherial port reserved for the NAT
function.
the wspcfg.ini and mspclnt.ini will bind ports between the client and
the ISA server, however it has no effect on how the ISA server then
sends the request to the host.
anyway.. The list was great help in guiding me thrugh this situation,
and so I am obliged to keep it up to date.
-Jay
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