If you run Bitcoin-QT...

You need to open Port 8333!


We need more Bitcoin Nodes. You can help!

If you are running Bitcoin-QT and you do not have port 8333 open from the outside world to your node (the machine running bitcoin-QT), then you are not helping the bitcoin network.

Hover your mouse over the bottom right corner of your Bitcoin-QT client. If it shows 8 or fewer connected nodes, you most likely do not have port 8333 open. Port 8333 is the port that other bitcoin nodes use to connect to your node.

For information about why you need port 8333 open, please see this reddit discussion. For information about bitcoin nodes in general, please see this Coindesk article. For the locations of all bitcoin nodes, please see this Bitcoin Foundation project.

Port 8333 is CLOSED!

This site has already tested the status of port 8333 on your ip (

Unfortunately, port 8333 is not open. Please open it!

For more information about opening ports, please see this google search.