> Is this old info or a bad take? Yes. With IPv6 there are still stateful firewalls on routers. An app/service still generally needs to do firewall hole punchi

> Is this old info or a bad take? Yes. With IPv6 there are still stateful firewalls on routers. An app/service still generally needs to do firewall hole punching via UPnP or PCP. The main thing that goes away is the rigamarole of figuring out the public IP address: * https://tailscale.com/blog/how-nat-traversal-works/ https://tailscale.com/blog/how-nat-traversal-works/ With my Asus RT-AC68U I can ping my IPv6 address: * https://www.subnetonline.com/pages/ipv6-network-tools/online-ipv6-ping.php https://www.subnetonline.com/pages/ipv6-network-tools/online... But cannot connect to SSH from the Internet (but localhost works), or port 80 (if I launch 'nc -6 -l 80'): * https://www.subnetonline.com/pages/ipv6-network-tools/online-ipv6-port-scanner.php https://www.subnetonline.com/pages/ipv6-network-tools/online... Firewalls do not stop working with IPv6.