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Opera comes with built-in support for the BitTorrent protocol. BitTorrent is a peer-to-peer file-distribution protocol that lets you download large files without putting too much strain on one single server, because the download is distributed.
Although frequently referred to as "downloading", the BitTorrent protocol relies on all users to be recipients and distributors of .torrent files. While you download a BitTorrent archive to your computer, you are also helping to distribute it to other users. It is not possible to download without uploading, although you can of course set restrictions on bandwidth usage.
Sharing and Downloading
When you click a .torrent link, Opera will display a dialog where you can specify which folder you want the file downloaded to. Click "Yes" to start downloading.
After a portion of the archive has been downloaded to your computer, you will start sharing the parts you have already received with other BitTorrent users, also known as peers. The more peers help distribute a file, the faster the download will be.
Note: You will continue sharing content after your download has finished until you either stop the file transfer or close Opera.
The BitTorrent preferences can be accessed from the dialog displayed when you start a torrent transfer.
In the preferences you can specify how much bandwidth should be allowed to go into downloading and uploading respectively. If you find that BitTorrent takes up too much of your available network capacity with the default automatic bandwidth restriction, you need to adjust these settings.
Listen port and testing
Your computer may not be set up so that you can share BitTorrent files. In the preferences there is also a field to specify which port should be listening for incoming connections. Use the "Test" button next to the "Listen port" field to check whether your current setup will work.
If the test fails, you need to change the setup of your router and/or firewall to allow incoming BitTorrent connections on the specified port.
Note that some ports frequently used for BitTorrent may also be blocked by your service provider or system administrator.
The first time you use BitTorrent, your operating system or firewall may warn you that it has just blocked Opera. This is caused by Opera attempting to open the necessary server port for sharing content, as your firewall wants to make sure that such ports are not opened without your knowledge.
If this should happen, make sure to unblock Opera before proceeding.
Opera has a built-in BitTorrent search available from the drop-down search field on the address bar.
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