There are a variety of configurations that can prevent the EFT Server and DMZ Gateway from communicating. For example, if the DMZ Gateway computer's firewall is blocking connections, EFT Server will not be able to connect to DMZ Gateway.
If the status icon in DMZ Gateway does not change color to green indicating a successful connection, verify the following:
Verify that the services for both EFT Server and DMZ Gateway are started. (Look in the Services dialog box in the Windows Control Panel or the Task Manager.)
If you make changes in DMZ Gateway, make sure to click Apply. Stop and then restart the service and/or the Site after making changes.
Verify that the IP address for EFT Server is not blocked in DMZ Gateway's IP Access Exception list. By default all IP addresses are granted access until you block or allow specific addresses. (Refer to Configuring DMZ Gateway for the procedure for blocking/unblocking IP addresses.)
Verify that EFT Server can reach the IP address that DMZ Gateway is listening on.
If you made configuration changes in EFT Server, especially connection settings (protocols allowed, ports, etc.), make sure to stop and then restart the EFT Server service. Once restarted, make sure EFT Server is running (listening for new connections) and that DMZ Gateway remains enabled.
Verify that the DMZ Gateway settings in EFT Server have the proper IP address and port for the Gateway and that the allowed protocols and ports have been defined for allowed incoming client connections to the Gateway.
Try pinging from EFT Server computer to the DMZ Gateway computer and from the DMZ Gateway computer to EFT Server computer. If you cannot connect, verify that there is no firewall that would block connections.
If a connection between EFT Server and DMZ Gateway is indicated, but clients cannot connect to EFT Server through DMZ Gateway:
Verify that you can connect to EFT Server using a client account from within your network.
If connection is successful, something is not configured properly in the DMZ Gateway settings, either in DMZ Gateway or in EFT Server. Verify that EFT Server and DMZ Gateway are connected (see above) and that, in EFT Server<--> Gateway configuration settings, the correct protocols and ports are specified for incoming client connections to the Gateway. These are the ports on which external clients will connect to the Gateway. If no protocol is enabled or the wrong port is defined, clients will not be able to connect to the Gateway.
If connection fails, there is a configuration issue in EFT Server. Review your configuration of user accounts and connection settings.