Transmission

Just to add, I've been experiencing a similar problem recently. Whilst not completely locked up, browsing became very slow while using transmission and I'd have to refresh a page several times to get it to load. Even after quitting Transmission the problem would persist and I'd have to restart my ...

FYi, same thing happened to me. Port was open, nothing changed on the router then all of a sudden the port closed.

Through a bit of trial and error I did this

I went into the router settings, disabled upnp, restarted the router, fired up transmission and port was (understandably) closed

I then ...