... host to be delivered to an internal host. Although this is generally an adequate level of protection for most home environments, it is important to understand that reliance on NAT alone to protect ... because NAT does not guarantee security in and of itself, as noted in RFC 2663 Section 9.0. For example, NAT devices are as susceptible to targeted attacks, such as denial-of-service (DoS) attacks, ... attacks, as non-NAT devices. NAT also provides for no actual filtering of packets leaving the internal network; instead, it permits all outbound traffic as long as it can be translated accordingly....