Add Port Forward Rule: Enter the port number or range and select the protocol (TCP or UDP). You may need to enter both internal and external port numbers, but they can usually be the same.

Test if Firewall is blocking a Port. Check which Ports are being used. Also learn how to check which process or service is using the open port.

Unfortunately, things are more complicated on the PC and PlayStation 3 - you'll need to open separate TCP and UDP ports, and a lot more of them. But it's not difficult.

Port Query (PortQry.exe) is a command-line utility in the Windows operating system that you can use to help troubleshoot TCP/IP connectivity issues.

Learn how to use netstat commands to watch open ports. Using the –b, -o, -an, interval, and tasklist commands, you can find IP addresses, port numbers, connections, process IDs and ...

How to See the Ports That Are Blocked on a Router. By default, Windows and the network router open some ports used for Internet and Web applications such as email, browsing, FTP file transfers and ...

Yes, UDP port scanning isn't great, but it's just weird that so many machines are responding with that UDP port active, no corespoding TCP port active, and through repeated scannings.