Figure 4-16 Internet Access & Nat Example; Figure 4-17 Nat Example - ZyXEL Communications Prestige 100IH User Manual

From Menu 4 shown above, simply choose the SUA Only option from the Network Address Translation
field. This is the Many-to-One mapping discussed in section 4.1.3. The SUA Only read only option from the
Network Address Translation field in Menus 4 and 11.3 is specifically pre-configured to handle this case.
4.6.2 Example 2 – Internet Access with an Inside Server
In this case, we do exactly as above (use the convenient pre-configured SUA Only set) and also go to Menu
15.2.1 to specify the Inside Server behind the NAT as shown in the next figure.
4-16
Menu 4 - Internet Access Setup
ISP's Name= ChangeMe
Pri Phone #= 4125678
Sec Phone #=
My Login= N/A
My Password= N/A
My WAN IP Addr= 0.0.0.0
NAT= SUA Only
Address Mapping Set= 255
IP Subnet Mask= N/A
Telco Options:
Transfer Type= 64K
Multilink= Off
Idle Timeout= 300
Press ENTER to Confirm or ESC to Cancel:
Figure 4-16 Internet Access & NAT Example

Figure 4-17 NAT Example 2

P100IH ISDN Router
NAT