The main difference between Static NAT and Hide NAT is that Static NAT allows incoming and outgoing connections, while Hide NAT only allows outgoing connections4. Static NAT translates a single IP address to another single IP address, while Hide NAT translates a group of IP addresses to a single IP address. Static NAT is used to expose internal servers to external networks, while Hide NAT is used to hide internal hosts from external networks. References: Check Point R81 Firewall Administration Guide