Portforwarding the Mac OS X Firewall
On 10.4 Tiger
- Open Transmission, go to Preferences >> Network and enter a number for the port. It is recommended you pick a random number between 49152 and 65535. Let's use 50001 for now. Then quit Transmission.
- Open System Prefs >> Sharing >> Firewall. Click "New." In the "Port Name" pop-up menu, select Other, and fill in the settings as follows:
- TCP Port Number(s): the port you chose in step 1 - eg 50001.
- UDP Port Number(s): the port you chose in step 1 - eg 50001.
- Description: Transmission
- Click OK.
NB: To disable the firewall, click Stop.
On 10.5 Leopard
Upon opening Transmission for the first time, a Mac OS X dialogue box should appear asking if you will allow Transmission to receive incoming connections. Click Accept.
If this doesn't happen, you can add Transmission to Leopard's firewall manually:
- Open System Prefs >> Security >> Firewall. Make sure "Set access for specific services and applications" is selected.
- Click the "+" button and select Transmission from you Applications folder.
- Make sure the pull down menu is set to "Allow incoming connections".