ZyXEL Communications AMG1302-T series User Manual page 159

• One to One: In One-to-One mode, the AMG1302/AMG1202-TSeries maps one local IP address
to one global IP address.
• Many to One: In Many-to-One mode, the AMG1302/AMG1202-TSeries 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).
• Many to Many Overload: In Many-to-Many Overload mode, the AMG1302/AMG1202-TSeries
maps the multiple local IP addresses to shared global IP addresses.
• Many-to-Many No Overload: In Many-to-Many No Overload mode, the AMG1302/AMG1202-
TSeries maps each local IP address to a unique global IP address.
• Server: This type allows you to specify inside servers of different services behind the NAT to be
accessible to the outside world.
Port numbers do NOT change for One-to-One and Many-to-Many No Overload NAT mapping
types.
The following table summarizes these types.
Table 53 NAT Mapping Types
TYPE
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
Many-to-Many No Overload
Server
AMG1302/AMG1202-TSeries User's Guide
IP MAPPING
ILA1 IGA1
ILA1 IGA1
ILA2 IGA1
...
ILA1 IGA1
ILA2 IGA2
ILA3 IGA1
ILA4 IGA2
...
ILA1 IGA1
ILA2 IGA2
ILA3 IGA3
...
Server 1 IP IGA1
Server 2 IP IGA1
Server 3 IP IGA1
Chapter 11 Network Address Translation (NAT)
159