NAT Binding

A NAT flow has two devices associated with it that are in communication with each other: the client device belonging to the inside (private) network and the server device belonging to the outside (public) network. Each active NAT flow has a binding resource associated with it. Each flow is based upon the following criteria:

If it is a non-FTP NAT flow:

• Source IP Address - The inside client IP address
• Destination IP Address - The outside server IP address

If it is a NAPT or FTP flow:

• Source IP Address - The inside client IP address
• Destination IP Address - The outside server IP address
• Source Port - The inside client source port
• Destination Port - The outside server destination port