ZyXEL Communications VMG1312-B10C, User Manual

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Chapter 10 Network Address Translation (NAT)
VMG1312-B10C User’s Guide
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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.
Local End IP Enter the ending Inside Local IP Address (ILA). If the rule is for all local IP addresses, then
this field displays 0.0.0.0 as the Local Start IP address and 255.255.255.255 as the Local
End IP address. This field is blank for
One-to-One mapping types.
Global Start IP Enter 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.
Global End IP Enter the ending Inside Global IP Address (IGA). This field is blank for One-to-One and
Many-to-One mapping types.
Set Select the number of the mapping set for which you want to configure.
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.
Table 62
Address Mapping: Add/Edit (continued)
LABEL DESCRIPTION