What Is The Difference Between Sua And Full Feature Nat; Is It Possible To Access A Server Running Behind Sua From The Outside Internet? How Can I Do It; When Do I Need Select Multiple Ip In Nat (Full Feature Nat) - ZyXEL Communications P-660R-Tx Series Support Notes

Adsl2+ ethernet router

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the destination fields of the packet (since it is now moving in the opp osite

direction), the checksums are recomputed, and the packet is delivered to its

true destination. This is because SUA keeps a table of the IP addresses and

port numbers of the local systems currently using it.

7. What is the difference between SUA and Full Feature NAT?

When you edit a remote node in Web Configurator, Advanced Setup,

Advanced Setup -> NAT -> Number of IPs, there will be two options for you:



Single



Multiple

Single here means SUA (Single User Account). In previous versions is a NAT

set with 2 rules: Many-to-One and Server. With SUA, 'visible' servers had to be

mapped to different ports, since the servers share only one global IP.

The P-660R-Tx now has Multiple, stands for Full Feature NAT, which supports

five types of IP/Port mapping: One to One, Many to One, Many to Many

Overload, Many to Many No Overload and Server. You can make special

application when you select Multiple. For example: With multiple global IP

addresses, multiple severs using the same port (e.g., FTP servers using port

21/20) are allowed on the LAN for outside access.

The P-660R-Tx 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 supports 8 sets

since there are 8 remote nodes.

8. 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-660R-Tx 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,

Advanced Setup -> NAT -> DMZ.



Make multiple local servers on the LAN accessible from outside with

multiple global IP addresses

With Single IP (SUA), 'visible' servers had to be mapped to different ports, since

the servers share only one global IP. But when you select Multiple IPs

P-660R-Tx Series Support Note s

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