1. You will definitely need to forward a port for your Linksys:
Port Forwarding for the Linksys BEFSR41 versions 3, 4, 5 and CA And very important is that you set up a static ip address based on your comp's id. After you foreward a port remember to save your settings. With some modems, you need to actually reboot them after these types of changes.
2. You'll need to force ip (which is the easiest part):
Force IP instructions & sample image
3. Double-check your firewall settings b/c SP2 forces their settings back to default & also reduces connectivity:
http://www.limewire.com/english/content/firewalls.shtml
4. Make sure your Java is up to date:
Java 1.4.2 (click on link)
5. I have a suspicion your Toshiba Cable Modem will also have nat firewall but we'll 1st see how things are from here.
6. If necessary you may need to check your SP2:
http://www.gnutellaforums.com/showth...threadid=28437
& also
http://www.gnutellaforums.com/showth...threadid=28427