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- Why do I see a red dot and "Port is closed"?
-You haven't port forwarded correctly. Port forwarding opens a port in your firewall or router so that incoming connections from the outside world can be made with Transmission. -
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- Why do I need to Port Forward?
-Transmission uses a single port for all the torrents you are downloading. If the port has not been opened (ie forwarded) that means only you can make connections to others in the swarm. - If the port is forwarded, others can connect to you, thus increasing the potential number of people connected to you, and more importantly increasing the speed of your download. -
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- How do I Port Forward?
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- If you have an Apple Airport, or a UPnP compatible router, Transmission can map its port automatically. Most routers manufactured since 2001 have this feature.
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- Open Transmission. -
- Go to Preferences >> Network, and check 'Automatically map port'. -
- You should see a success notification and green dots. -
If you get a red dot and the message 'Error mapping port', click here. -
- If you don't have a compatible router, it is simple to forward Transmission's port manually. For instructions click here. - -
- If you don't use a router, that is, your modem is directly connected to your computer, you'll need to open Transmission's port in the Mac OS X firewall. For instructions click here.
- NB: it is highly recommended you enable the Mac OS X firewall if you are not using a router.
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- How do I know if I've done it right?
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- Open Transmission. -
- Go to Preferences >> Network. -
- Check the notification next to 'Incoming TCP Port'. -
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- If you get a green dot and 'Port is Open' then you have successfully port forwarded! -
- If you get a red dot and the message 'Port is Stealth' or 'Port is Closed' then you haven't forwarded correctly.
- NB: If Transmission has successfully mapped the port automatically, but the notification still indicates 'Closed/Stealth' click here.
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