Is It Possible To Access A Server Running Behind Sua From The Outside Internet? If Possible, How; When Do I Need To Select Full Feature Nat; What Ip/Port Mapping Does Multi-Nat Support - ZyXEL Communications P-793H v2 Support Notes

The P-793H v2 supports NAT sets on a remote node basis. They are reusable,
but only one set is allowed for each remote node. The P-793H v2 supports 8
sets since there are 8 remote nodes.
By factory 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? If possible, how?
Yes, it is possible because P-793H v2 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 to 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-793H v2 maps one ILA to one
IGA.
All contents copy right © 2010 Zy XEL Communications Corporation.
P-793H v 2 Support Notes
?
7