@AceArsenault @tasket @paul_ipv6 My machines do have unique globally routable IP addresses, and I do use a firewall, but security isn't a single issue. A firewall isn't sufficient to handle the security concern of tracking based on IP addresses. While NAT isn't the only way to deal that, it is a simple and effective way. While it's true that NAT has some undesirable properties, they may not be a significant concern in all cases.