Clarifying the basics
NAT and connections initiated from the private network
NAT and connections initiated from the Internet
NAT and TA
Configuring a router without using
UPnP
Playing TA Internet games from behind the router with a single computer
The compromise between security and effort
The
DMZ
option
Maximal security requires some additional effort
Single computer conclusions
Playing TA Internt games from behind the router with multiple computers
Router prerequisites for joining the same Internet game with multiple computers
Multiple computer conclusions
Configuring a router by utilising
UPnP
Joining TA games on the Internet from behind the router
Hosting TA games on the Internet from behind the router
UPnP conclusions