Hi Jay, You can make the machine a Firewall client and configure the mspclnt.ini file to bind the appropriate ports on the ISA Server. You can check the process name in the firewall service logs and use that in the [application] header for the section that includes the bindings. This is a solvable problem, so take heart :-) Tom www.isaserver.org/shinder Thomas W Shinder, M.D., MCSE, MCT -----Original Message----- From: jmobley@xxxxxxxxxx [mailto:jmobley@xxxxxxxxxx] Sent: Wednesday, August 22, 2001 11:43 PM To: [ISAserver.org Discussion List] Subject: [isalist] LPR requires defines SOURCE port http://www.ISAserver.org So As I understand it, NAT works by assigning a dynamic port to outgoing traffic, and when that traffic returns to that port, the server remembers who it goes to. Also as I understand it the RFC for LPR requires that requests send to the server port of 515 originate from 721-731 , or something else depending on where u read. (I believe a revised RFC allows for a wider source port range) but anyway, I MUST find out how to convince my ISA server to send out anything destined for port X ( in this case 515 ) via port Y (721-731) but I find no options that even remotly resemble this. Help please and thank you too. -Jay Mobley ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')