Hello!
On my router(I've got a netgear one) the username is by default admin, and the password is just password.
When opening ports on this router I click on port forwarding, then add new service.
Then I click on add custom service. since topspeed isn't listed in the default services list.
then you'll have to enter a start port and ending port for the service you want to open. in the readme for tospeed there is information on wich ports to open.
then you'll have to enter the ip address for the computer you want to open the service for.
the easiest thing to do if ou want your ip is go to a command prompt by typing command in a run dialog box.
then type
ipconfig
in the text you get on the screen you see the 192.168 ip-adress your router gave the computer. type that address in the ip adress field.
click on add service, and then apply changes.
This is at least how I do it with my netgear. I don't know about other routers since I've never tried them.
/Kristoffer