Don't know what happened but it miraculously started working! Host Online works fine now and no more CTD when I Host LAN. Thanks for all the help guys

Oh, okay I get you now. I need a way that has nothing to do with the router to see if they're open, my router doesn't have anything like that.

Almost the same for me. I just need a way to check if they're open or not

Is there a way to check if ports are forwarded? I've forwarded the needed ports as far as I know.

No success after restarting numerous times,

Host Online is the usual "Unable to get our online address information"

Host LAN Still crashes. This is what's in the console after the crash if it's any help:

----- Initializing Renderer ----
execi...