When Do I Need Select Full Feature Nat; What Ip/Port Mapping Does Multi-Nat Support - ZyXEL Communications ADSL2+ 4-port Security Gateway Support Notes

must be configured. (You can configure it in Web Configurator, Advanced
Setup, Network -> NAT -> Port Forwarding).

12. When do I need select Full Feature NAT

•
Make multiple local servers on the LAN accessible from outside with
multiple global IP addresses
With SUA, 'visible' servers had to be mapped to different ports, since the
servers share only one global IP. But when you select Full Feature, you can
make multiple local servers (mapping the same port or not) on the LAN
accessible from outside with multiple global IP addresses.
•
Support Non-NAT Friendly Applications
Some servers providing Internet applications such as some MIRC servers do
not allow users to login using the same IP address. Thus, users on the same
network can not login to the same server simultaneously. In this case it is
better to use Many-to-Many No Overload or One-to-One NAT mapping types,
thus each user login to the server using a unique global IP address.

13. What IP/Port mapping does Multi-NAT support?

Multi-NAT supports five types of IP/port mapping: One to One, Many to One,
Many to Many Overload, Many to Many No Overload and Server. The details
of the mapping between ILA and IGA are described as below. Here we define
the local IP addresses as the Internal Local Addresses (ILA) and the global IP
addresses as the Inside Global Address (IGA),
• One to One: In One-to-One mode, the P-662H-D maps one ILA to one
IGA.
• Many to One: In Many-to-One mode, the P-662H-D maps multiple ILA
to one IGA. This is equivalent to SUA (i.e., PAT, port address
translation), ZyXEL's Single User Account feature that previous ZyNOS
routers supported (the SUA is optional in today's Prestige routers).
• Many to Many Overload: In Many-to-Many Overload mode, the
P-662H-D maps the multiple ILA to shared IGA.
• Many One-to-One: In Many One-to-One mode, the P-662H-D maps
each ILA to unique IGA.
• Server: In Server mode, the P-662H-D maps multiple inside servers to
one global IP address. This allows us to specify multiple servers of
different types behind the NAT for outside access. Note, if you want to
map each server to one unique IGA please use the One-to-One mode.
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P-662H-D Series Support Notes
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