Is It Possible To Access A Server Running Behind Sua From The Outside Internet? How Can I Do It; When Do I Need Select Full Feature Nat; What Ip/Port Mapping Does Multi-Nat Support - ZyXEL Communications P-660HW-Tx v3 Support Notes

By fatory default, the NAT is select as SUA in Web Configurator, Advanced
Setup, Network -> NAT -> General -> NAT Setup.
11. Is it possible to access a server running behind SUA from the outside
Internet? How can I do it?
Yes, it is possible because P-660HW-Tx v3 delivers the packet to the local
server by looking up to a SUA server table. Therefore, to make a local server
accessible to the outside users, the port number and the inside IP address of
the server 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-660HW-Tx v3 maps one ILA
to one IGA.

Many to One: In Many-to-One mode, the P-660HW-Tx v3 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
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P-660HW-Tx v3 Series Support Notes
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