I need to develop a very easy to use application that can 100 %
test router port forwarding for a specific given port. For example, the user enters the port number, and the program will test to see if the port is open for incoming connection (to check if the port forwarding worked correctly), can anyone help me start this or guide me where to read to solve this?
I want to make something very similar to this one:
http://home.no.net/tgrumpy/ct/dex.php Thanks