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What ports need to be open in a firewall for ArcIMS?
1. Port 5300 needs to be open if the Web server and the ArcIMS Application Server are separated by a firewall. Additionally, the spatial server needs a means to place output images onto the Web server. This may require additional ports to be open.
2. Ports 5050 and 5353 need to be open if a firewall separates the ArcIMS Application Server and the ArcIMS Spatial Server.