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9. What is the difference between SUA and Multi-NAT?
SUA (Single User Account) in previous ZyNOS versions is a NAT set with 2
rules, Many-to-One and Server. The P-660R-Tx v2 now has Full Feature NAT
support to map global IP addresses to local IP addresses of clients or servers.
With multiple global IP addresses, multiple severs of the same type (e.g., FTP
servers) are allowed on the LAN for outside access. In previous ZyNOS
versions that supported SUA 'visible' servers had to be of different types. The
P-660R-Tx v2 supports NAT sets on a remote node basis. They are reusable,
but only one set is allowed for each remote node. The P-660R-Tx v2 supports
8 sets since there are 8 remote node. The default SUA (Read Only) Set in
menu 15.1.255 is a convenient, pre-configured, read only, Many-to-One
mapping set, sufficient for most purposes and helpful to people already familiar
with SUA in previous ZyNOS versions.
10. Is it possible to access a server running behind SUA from the outside
Internet? If possible, how?
Yes, it is possible because P-660R-Tx 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 inWeb Configurator, Advanced Setup -> NAT
-> Edit NAT/SUA Server Set.
11. When do I need Multi-NAT
•
Make local server accessible from outside Internet
When NAT is enabled the local computers are not accessible from outside.
You can use Multi-NAT to make an internal server accessible from outside.
•
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.
12. What IP/Port mapping does Multi-NAT support ?
NAT supports five types of IP/port mapping. They are: 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
All contents copyright © 2006 ZyXEL Communications Corporation.
P-660R-Tx v2 Series Support Notes
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