ZyXEL Communications Prestige 792H, User Manual

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Prestige 792H User’s Guide
NAT 6-3
Figure 6-2 NAT Application With IP Alias
6.1.5 NAT Mapping Types
NAT supports five types of IP/port mapping. They are:
1. One to One : In One-to-One mode, the Prestige maps one local IP address to one global IP address.
2. Many to One : In Many-to-One mode, the Prestige maps multiple local IP addresses to one global IP
address. This is equivalent to SUA (for instance, PAT, port address translation), ZyXEL’s Single User
Account feature that previous ZyXEL routers supported (the
SUA Only option in today’s routers).
3. Many to Many Overload : In Many-to-Many Overload mode, the Prestige maps the multiple local IP
addresses to shared global IP addresses.
4. Many-to-Many No Overload : In Many-to-Many No Overload mode, the Prestige maps each local IP
address to a unique global IP address.