We have an application running on our LAN which uses DCOM. I have set the default DCOM permissions for users to run DCOM from the server- but the Windows firewall seems to be stopping the application from running. The DCOM handshake is done on port 135 (shown as epmap on netstat) and needs to transfer to a port range of 5000-6000. I have tried to enable port 135 on the firewall but this does not work. However, if I shut down the windows firewall the application works. How do I get this app to run on a defined port setting of 5000-6000? handshaking on port 135 with the windows firewall enabled?