I know it's been repeated a million times by now, but NAT is not a replacement for a firewall. Most residential routers are deny in by default so you get zero incoming connections from the internet unless you open the relevant ports, exactly as with NAT.
roamerz|3 years ago
Dagger2|3 years ago
(Of course v6 adds more than just one octet, since one additional octet wouldn't be enough even for the current size of the Internet, let alone for future growth. It would be really stupid to go through all this effort, only to have to turn around and do it all again immediately afterwards because you forgot to add enough the first time around.)