SmartRG505N Modem not showing any advanced options

[1812Fr]

I have been trying to port forward a few ports to use with OpenVPN and after getting into my modem I get no options do do anything advanced. After following a few guides I see a lot of people have much more options than me for their modem. Is there seomthing I'm doing wrong? Has anybody else had this problem?

My modem
The same modem except someone else

 

[CrzyGK]

You are lacking advanced options because your ISP loaded their own custom firmware that disables those options. If you want to configure port-forwarding, it looks like you'll have to get another router and find a way to put your current modem in Bridge Mode.