You might have encountered the term Port Forwarding when configuring bittorrent on your computer or analyzing slow or none existing traffic with bittorrent. One of the first answers of those helpful support guys in all forums is always check Port Forwarding, but what the heck is it?
Port Forwarding can be described as a way to tell your router to send specific traffic to a specific computer inside the network. For bittorrent it would mean that the bittorrent ports that are used are forwarded to the network device that is running your bittorrent client.
Bittorrent is however not the only possible application. You could forward requests for port 21 to a home ftp server or requests for port 80 to a web server.
The Port Forwarding Tester tests if this is setup correctly. This can be done by simply entering the computers IP and the port that you want to check. The port forwarding script scans for your IP by default, you only need to change it if you want to test a different computer that has a different IP.
If the result is that the port is blocked at that IP Port Forwarding is not setup properly. A great site to find out how you setup port forwarding for your router is the website Port Forward which has instructions for hundreds of routers.
The Port Forwarding Tester lets you test any port on its Internet site. Just enter a port you are interested in and click on the check button afterwards to start the test. The IP should get filled out automatically so you normally do not have to worry about it. If you think it is not correct, check your IP here.
If the port is not forwarded check out the Port Forwarding Configurations page to find out how you can configure your router or PC to do just that.
Advertising revenue is falling fast across the Internet, and independently-run sites like Ghacks are hit hardest by it. The advertising model in its current form is coming to an end, and we have to find other ways to continue operating this site.
We are committed to keeping our content free and independent, which means no paywalls, no sponsored posts, no annoying ad formats (video ads) or subscription fees.
If you like our content, and would like to help, please consider making a contribution:
Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.