Nat Mapping Types; Figure 78 Nat Application With Ip Alias - ZyXEL Communications P-660HN User Manual

Chapter 8 Network Address Translation (NAT)

Figure 78 NAT Application With IP Alias

Corporation B
LAN2: 192.168.1.X
Network Server
"Admin=192.168.1.1
NAT Server
192.168.1.1
LAN2: 192.168.2.X
Network Server
"Sales"=192.168.2.1
NAT Server
192.168.2.1
LAN3: 192.168.3.X
Network Server
"R&D"=192.168.3.1

8.6.5 NAT Mapping Types

NAT supports five types of IP/port mapping. They are:
• One to One: In One-to-One mode, the ZyXEL Device maps one local IP address to one
global IP address.
• Many to One: In Many-to-One mode, the ZyXEL Device 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 ZyXEL Device maps
the multiple local IP addresses to shared global IP addresses.
• Many-to-Many No Overload: In Many-to-Many No Overload mode, the ZyXEL Device
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.
146
NAT Server
192.168.3.1
Corporation A
Server in
Admin Network
=IP1 (IGA 1)
WAN Addresses: LAN Addresses: (Default IPs)
IGA 1 ---------------> 192.168.1.1
IGA 2 ---------------> 192.168.2.1
IGA 3 ---------------> 192.168.3.1
Server in
Sales Network
=IP2 (IGA 2)
Server in
R&D Network
=IP3 (IGA 3)
P-660HN-Fx User's Guide