1. What is needed to use "ACTIVE MODE" ?
" requires both TCP and UDP access on the same port incoming and all ports outgoing for StrongDC to work properly.
And there are 2 different situations:
If you are NOT behind a router, it will be quite simple.
You must only leave the IP fields blank (Settings->Connection settings) AND allow StrongDC in your software firewall.
If you are behind a router, the situation will be a bit difficultier to You.
You must set up the router to forward the connections to the computer with StrongDC. (it is called port forwarding).
More information about how to do this with your router/NAT, You can find out in the user manual or at this site.
Then You must select "Firewall with manual port forwarding" (Settings->Connection settings).
In the port fields, enter the port number that you are forwarding on the router. And that should be enough.
By the way, if You use "ACTIVE MODE
" and You have trouble with searching and downloading, just switch StrongDC to "PASSIVE MODE