I have been asked to troubleshoot a printing problem involving a Borderware Firewall 
and an IBM mainframe using VTAM and VPS for printing.  The printer will work when it 
is outside the Firewall, but not inside.  The mainframe will start to send the print 
job and about one page will print.  Then nothing happens.  The mainframe says it is 
waiting for a signal from the printer to start sending the job again.

We think that the firewall may be blocking either the port or the protocol that the 
mainframe needs to see to resume printing.  We can't seem to get any information on 
just what that would be.

Has anyone out there seen a similar problem?

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