If you're not running a firewall, your router is just as vulnerable as any device behind it would be with IPv6 — that is potentially vulnerable on any port it m

If you're not running a firewall, your router is just as vulnerable as any device behind it would be with IPv6 — that is potentially vulnerable on any port it might listen to. NAT is not a firewall, it's an ugly workaround to a scalability issue. For most home IPv6 networks, blocking all incoming traffic from the egress port will achieve the same level of security as a NAT'd IPv4. Different router/fw manufacturers would need their own guides on how to do that, but IMO any sane consumer product should be configured like that by default. Here's a guide for OpenBSD, for instance. Note how it includes "block all" which means it blocks everything not specifically allowed. https://www.openbsd.org/faq/pf/example1.html#pf https://www.openbsd.org/faq/pf/example1.html#pf