secure network address translation (SecureNAT, SNAT)

An extension of the Microsoft^® Windows^® network address translation (NAT) feature. NAT involves rewriting the addresses of Internet Protocol (IP) packets as they pass through a router or firewall, substituting a global IP address for the internal IP addresses. Because the global IP address is valid on the Internet, this process lets multiple hosts with private IP addresses share a single public IP address, while remaining protected by the firewall.