[GMOD] I dont know how to port forward/Port Trigger Heeelp!

[artzii2]

Ok, so my friends cant join my Gmod server because i dont know how to "port forward" well i dont have that kind of choose which would be named Port forward. But my friend told i could still make Server for Gmod because i Have couple selections in (NAT)(PAGE) there is 3 choices 1.Virtual servers 2.Port Triggering and DMZ host. I'm not sure which is the right one but i have tried Virtual Servers selection.Still dont know is it the right selection or
am i filling it up wrong way.
Couple Pics ->



Detailsefault gateaway 192.168.1.1 and IPv4 adress 192.168.1.2
If u need more details feel free to ask and Ty If u could help me with this problem! Btw tell if Port triggering is the right selection =D.