Unexpected Listener Startup or Connection Errors

Problem: You encounter unexpected listener start-up or connection errors for SAP Mobile Platform components. This is usually seen when SAP Mobile Server is installed on a host in DMZ (De-Militarized Zone) within the internal and external firewalls.

1. Verify that the TCP/IP filtering restriction is not in effect on the host machine.
   To do so on Windows XP, navigate to: Control Panel > Network Connections > Local Area Connection 1 > Properties > General tab > Internet Protocol (TCP/IP) > Properties > General tab > Advanced > Options tab > TCP/IP filtering > Properties
2. In TCP/IP Filtering, check to make sure the Enable TCP/IP Filtering (All Adopters) checkbox is not selected. This enables all SAP Mobile Platform infrastructure ports.
   If you do choose to select it, be sure to select Permit All for TCP Ports to enable all SAP Mobile Platform infrastructure ports. These ports are documented in the Port Number Reference in the Installation Guide for Runtime.
3. Click OK to close each window and save your changes.
4. You can change “Local Area Connection 1” to the network connection name being used on the machine.
5. Make sure users are not using third-party port blockers, like McAfee Antivirus.