You are not CONNECTABLE

Fair warning: failure to read and follow the steps explained below before creating a new forum thread about the issue will result in your warning level being increased by 1.

So you get the following message on the tracker main page/your Control Panel?

qBittorrent
Here's what you do:

1. Identify the port your torrent client uses. In qBittorrent go to "Tools" &rarr; "Options" then select "Connection". On the right, you will see a textbox labeled "Port used for incoming connections". Write down that number. Also, make sure that the option "Use different port on each startup" is disabled.



2. Now you need to tell your router to forward the port you have just written down, so that others can connect to your client. You do this in your router configuration. See http://portforward.com/ for guides, your router make and model will most likely be covered there; if you cannot find your exact model, try one of the same manufacturer, their menus will be very similar if not identical.

Fixed IP Address
The router you have usually assigns your computer an IP Address. Most times, the same IP is given. The problem arises when your computer gets a different IP than the one that you set your port forward to. That's why it's recommended to force your computer a fixed IP. There are two possibilities to achieve that:

1. On the computer, set it with a fixed IP. This is the easiest, but how to do that depends on the operational system installed.

2. The router is set to assign always the same IP to the computer, based on the computer's MAC Address. This is more complex, also because every router is different.

Google for guides according to your choice and equipment.

Firewall
Your computer and/or your router may have a firewall. Be sure they are set up in a way that incoming and outgoing traffic to qBittorrent is allowed.

Verification
The moment your client announces, the tracker does the reverse thing to the port your client reports.

Anything other than "open" results in a warning and is the result of the last announce of any client from any location you use.

Because every torrent announces to the tracker every 60 minutes, the warning message will never disappear if there isn't any active torrent, even if the port was properly forwarded.

Keep in mind that there are many (network related) hops in between that can potentially affect the result.

There are multiple web sites to test for your port being open immediately:

https://canyouseeme.org/

https://www.yougetsignal.com/tools/open-ports/

https://www.ipfingerprints.com/portscan.php

https://www.portcheckers.com/

https://portchecker.co/