Supports Mac 10.5 Leopard, 10.6 Snow Leopard, & Higher
(Please Note: If your anti virus says it found a virus of any kind please know this is a false alarm. You can use www.virustotal.com to also see what other antivirus software says.
There are no viruses in any of the programs on this site. If your anti virus says it has one please submit the file in question to your anti virus maker, they will then scan the file themselves, see the program or setup is clean and update there virus def's to not cause the false alarm.)
Simple Port Tester is a free program by PcWinTech.com to help users test if
their ports are open with just a few clicks.
Tests both TCP & UDP ports.
The trick with testing if your port forwarding is working is to have something on your computer actually listening on the port. If nothing is listening on the port the test will fail no matter what. This program will open the port, listen for the connection and help ensure a proper and reliable test as to whether or not your port forwarding is working.
Download, install and run it. Put in the port you wish to test and hit begin, that's it!