ZyXEL Communications SBG5500-A, User Manual

Page: 130 / 274

Chapter 8 Network Address Translation (NAT)
SBG5500 Series User’s Guide
130
The following table describes the fields in this screen.
8.4.1 Add/Edit Address Mapping Rule
To add or edit an address mapping rule, click Add or select a rule and click Edit icon in the Address
Mapping screen to display the screen shown next.
Figure 101 Address Mapping: Add/Edit
Table 46 Configuration > NAT > Address Mapping
LABEL DESCRIPTION
Add Click this to create a new address mapping rule.
Edit Double-click an address mapping rule or select it and click Edit to open a screen where you can
modify the rule’s settings.
Remove To remove an existing address mapping rule, select it and click Remove .
# This is the index number of the rule.
Type This is the address mapping type.
One-to-One : This mode maps one local IP address to one global IP address. Note that port
numbers do not change for the One-to-one NAT mapping type.
Many-to-One / Source NAT : This mode maps multiple local IP addresses to one global IP address.
This is equivalent to SUA (that is, PAT, port address translation), the SBG's Single User Account
feature that previous routers supported only.
Many-to-Many : This mode maps multiple local IP addresses to shared global IP addresses.
WAN Interface This shows the WAN interface through which the address mapping is forwarded.
Internal
Beginning IP This is the starting Inside Local IP Address (ILA).
Internal Ending
IP This is the ending Inside Local IP Address (ILA). This field is blank for One-to-One mapping types.
External
Beginning IP This is the starting Inside Global IP Address (IGA). Enter 0.0.0.0 here if you have a dynamic IP
address from your ISP. You can only do this for the
Many-to-One mapping type.
External Ending
IP This is the ending Inside Global IP Address (IGA). This field is blank for One-to-One and Many-to-
One mapping types.