I know how NAT works under FreeBSD and it doesn’t ignore remote IP/port. Would be surprised if Linux differs in this regard and most home router are based on Li

I know how NAT works under FreeBSD and it doesn’t ignore remote IP/port. Would be surprised if Linux differs in this regard and most home router are based on Linux. I know little about CGNAT but one shouldn’t trust ISP with protection from unwanted connection and there is almost always a home router with one more NAT even if ISP uses CGNAT.