Security Gateways can use the following types of NAT (Network Address Translation) to translate IP addresses :
Source NAT : It initiates traffic from an internal network to an external network. When a source NAT is used, only the source IP address is translated into the public address.
Hide NAT : It is used to translate multiple private IP addresses into a single public IP address. In other words, many to one translations. This can only be used for source NAT translation, not destination NAT.
Destination NAT : When connecting from a public IP address to a private IP address, Destination NAT is used to translate the IP address of the destination. In this, only static NAT is used.
