> when NAT is overwhelmingly a feature built into firewalls This is just not correct. NAT and firewall are simply orthogonal concepts and can and often are dep

> when NAT is overwhelmingly a feature built into firewalls This is just not correct. NAT and firewall are simply orthogonal concepts and can and often are deployed separately. A simple example is your average small SOHO router, which usually has NAT but quite a lot of them lack a firewall.