Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

0dev

macrumors 68040
Original poster
Dec 22, 2009
3,947
24
127.0.0.1
I'm just curious here. I'm running Lion and I set up the OS X firewall to block all incoming connections, yet when I run uTorrent it seeds fine, which is awesome but I thought I'd have to set up the firewall to allow uTorrent to accept incoming connections. So does that work when the firewall should be blocking it? And does it mean other things can get through the firewall or not?
 
There may be a firewall exception for that application or the app uses a standard port for transmission, i.e., port 80 which will not be blocked
 
There may be a firewall exception for that application or the app uses a standard port for transmission, i.e., port 80 which will not be blocked

I never set up an exception. It could have been using a standard port though. I was using magnet links and the communication was through DHT.
 
uTorrent supports automatic port mapping with either NAT-PMP or UPnP, assuming your router also supports one of those protocols (most modern routers support at least UPnP).

Since uTorrent is working for you, you probably already have this option selected. To verify, go to uTorrent Preferences-->Network and you'll see that the option "Automatically map port" is checked.

No muss, no fuss. Wikipedia has good articles on NAT-PMP and UPnP if you want to read more about how they work.
 
uTorrent supports automatic port mapping with either NAT-PMP or UPnP, assuming your router also supports one of those protocols (most modern routers support at least UPnP).

Since uTorrent is working for you, you probably already have this option selected. To verify, go to uTorrent Preferences-->Network and you'll see that the option "Automatically map port" is checked.

No muss, no fuss. Wikipedia has good articles on NAT-PMP and UPnP if you want to read more about how they work.

Awesome, thanks for the info.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.