Be careful. The port number for HP's JetDirect/PJL protocol varies quite often with printers, but the port number for LPR is pretty much fixed -- I never see people use a different number besides 515 for LPR.

If you really do need to connect to a printer on a different port, you could write TCP socket program that receives connections on 515, then connects to the printers port, and copies everything it receives on 515 to the printer's port 1234, and vice-versa. Easy enough to code for someone familiar with the socket API.

But I would be very suspicious of this. If they really are using LPR, it would be extremely unusual to use a different port, and it might be a good indication that they're really using something else besides LPR.

Albert York wrote:
I don't know the specifics. I was asked this question by a co-worker
becuase she has a client who requested it. Apparently they have some
printers which use non-standard ports.

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