Operation Manual

Chapter 10 Network Address Translation (NAT)
SBG3300-N Series User’s Guide
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The following table describes the fields in this screen.
10.8 Technical Reference
This part contains more information regarding NAT.
10.8.1 NAT Definitions
Inside/outside denotes where a host is located relative to the Device, for example, the computers
of your subscribers are the inside hosts, while the web servers on the Internet are the outside
hosts.
Global/local denotes the IP address of a host in a packet as the packet traverses a router, for
example, the local address refers to the IP address of a host when the packet is in the local
network, while the global address refers to the IP address of the host when the same packet is
traveling in the WAN side.
Table 63 Address Mapping: Add/Edit
LABEL DESCRIPTION
Type Choose the IP/port mapping type from one of the following.
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: This mode maps multiple local IP addresses to one global IP address. This is
equivalent to SUA (that is, PAT, port address translation), the Device's Single User Account
feature that previous routers supported only.
Local Start IP
Enter the starting Inside Local IP Address (ILA).
Local End IP Enter the ending Inside Local IP Address (ILA). This field is blank for One-to-One mapping
types.
Set Select the number of the mapping set to configure. Use the Broadband screens to map this
NAT address mapping set to a WAN interface.
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.