How can i tell if my ports are forwarded

[oromis]

Im not sure if i can host an internet game in blockland or gmod, cause people normally dont join my servers often, but i want to know if i need to reset my router or not(i forgot the uername and pass so i cant get into my admin page)

[Ad Bot]

[Headcrab Zombie]

http://whatsmyip.org/ports/

[oromis]

wow, that was fast. lemee check if it works and then ill lock

[oromis]

no modify button: which one do i click
i clicked them all, and i dont know what to enter as the custom one, and they dont load