I'm running a Linksys WRT54G, and I've under the Routers settings gotten it to allow ports 5198, 5199, and 5200. Same for my firewall, yet..... Windows XP Service Pack 3 Local IP address: XXX.XXX.X.XXX Firewall Test Results: FAIL The test successfully connected to the EchoLink server on TCP port 5200. This means that your system's TCP configuration is correct for use with EchoLink. The tester was unable to communicate over UDP. If you have Internet security software installed, be sure it is configured to allow EchoLink to access the Internet. If you have a router or firewall, be sure it is not blocking UDP ports. There appears to be a router between this computer and the Internet. A router normally requires special configuration for use with EchoLink. For more information, click the Help button above, or see the Firewall Solutions page on the EchoLink Web site.