Static Napt - Patton electronics SmartNode Series Software Configuration Manual

SmartWare Software Configuration Guide
Figure 25 illustrates the basic and enhanced behavior of the Dynamic NAPT. The big arrows indicate the
direction of the connection establishment. Although only a local host can establish a connection, traffic always
flows in both directions.

Static NAPT

Dynamic NAPT does not permit hosts on the global network to access hosts on the local network. Static
NAPT makes selected services (i.e. ports) of local hosts globally accessible. Static NAPT entries map global
addresses/ports to local addresses/ports. The global address can either be the address of the global interface or a
configured global NAPT address. Usually, the local and the global port of a static NAPT entry are the same;
however, they may be different.
Note
Be careful when mapping ports the SmartNode uses itself (e.g. Telnet,
TFTP) because the SmartNode might become inaccessible.
Introduction
Figure 25. Dynamic NAPT
Figure 26. Static NAPT
11 • NAT/NAPT configuration
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