Hello guys, I have concluded that the issue is with the router. I connected my ISP's ethernet cable directly into my PC and tested the games and I got an open NAT. So, I would like to ask, is it safe...

@woozle https://i.imgur.com/r90W2hC.jpg

@woozle I play GTA V and RDR 2, in my old router - Netgear R6220, NAT type was always open and there was even an option called "NAT filtering" which was set to open.

@woozle Hi, I tried that and have got an open NAT. Any ideas what to do now?

@Kevin_Z WAN IP is 49.206.xx.xx, it's most likely public, and if I enable DMZ, I get open NAT but isn't that not secure?

Hello @woozle yes, upnp is enabled, as well as NAT and NAT acceleration.