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This is the rule index number.
Local Start IP
This refers to the Inside Local Address (ILA), which is the starting local IP address. If the rule is for all local IP addresses, then this field displays 0.0.0.0 as the
Local Start IP address. Local IP addresses are
N/A for
Server port mapping.
Local End IP
This is the end Inside Local Address (ILA). If the rule is for all local IP addresses, then this field displays 255.255.255.255 as the
Local End IP address. This field is
N/A for
One-to-One and
Server mapping types.
Global Start IP
This refers to the Inside Global IP Address (IGA), that is the starting global IP address. 0.0.0.0 is for a dynamic IP address from your ISP with
Many-to-One and
Server mapping types.
Global End IP
This is the ending Inside Global Address (IGA). This field is
N/A for
One-to-One,
Many-to-One and
Server mapping types.
Type
1.
One-to-One 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.
2.
Many-to-One mode maps multiple local IP addresses to one global IP address. This is equivalent to SUA (that is, PAT, port address translation), ZyXEL's Single User Account feature that previous ZyXEL routers supported only.
3.
Many-to-Many Overload mode maps multiple local IP addresses to shared global IP addresses.
4.
Many One-to-One mode maps each local IP address to unique global IP addresses.
5. Server allows you to specify inside servers of different services behind the NAT to be accessible to the outside world.
NAT Address Mapping
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