Example 2: Internet Access With An Inside Server - ZyXEL Communications Prestige 650R-31/33 User Manual

Prestige 650R-31/33 ADSL Router
From menu 4, choose the SUA Only option from the Network Address Translation field. This is the
Many-to-One mapping discussed in section 7.5. 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.

7.5.2 Example 2: Internet Access with an Inside Server

Figure 7-15 NAT Example 2
In this case, you do exactly as above (use the convenient pre-configured SUA Only set) and also go to
menu 15.2 to specify the Inside Server behind the NAT as shown in the next figure.
7-18 NAT