Now, before I say something, I gotta state that I don't actually know the whole picture and I'll try to explain things as I understand them.
Just recently I've got my flat wired up with a cable-modem internet connection. It's a Motorola Surfboard cable modem that, as I imagine, sends and receives data from a central network router that later directs traffic to outer servers.
Now, as you already know, most bittorrent clients state in their manuals that to get maximum seeding and leeching efficiency you have to be connectable. As I get it, that's the state when you can have an external server connect to your torrent client through some port.
I tried contacting the technical support of the network that provides the connection and asked whether they could set up port forwarding for me without giving me an external IP address. They said that it was technically possible only for one session until the internal dynamic IP address is reassigned (I figured that this is until I reboot).
Is there some way I can get connectable in this situation?