Deterministic address translation mode provides address translation that eliminates logging of every address mapping, while still allowing internal client address tracking using only an external address and port, and a destination address and port. Reverse mapping allows BIG-IP® CGNAT operators to respond to legal requests revealing the identity of the originator of a specific communication. A typical example is revealing the identity of file sharers or P2P network users accused of copyright theft.
Deterministic mode allows unique identification of internal client address based on:
Deterministic mode has these configuration restrictions:
As an alternative to per-connection logging, deterministic mode maps internal addresses to external addresses algorithmically to calculate the mapping without relying on per-connection logging. Deterministic mode significantly reduces the logging burden while mapping a subscriber's inside IP address with an outside Internet address and port.
To decipher mapping generated by LSN pools using deterministic mode, you must use the DNAT utility that can be run from the system's tmsh command prompt.