[MovedGoalPosts]

You shouldn't need to be using static IPs. Let the router do the job and just open the necessary port to allow your torrents. However your torrents will do their best to overwhelm your router and connection unless you keep them on a very tight leash. Throttle back the upload bandwidth and minimise the number of connections. Many of the Linksys routers have a "feature" in the firmware that doesn't work too well with torrents in that it's maintains connections over the net for a long while. Torrents throw out loads of connections, and so the router ends up overloaded. Third party firmware can help resolve that.