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One-to-one: This is the 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 is the mode maps
multiple local IP addresses to one global
IP address. This is equivalent to Many to
One (i.e., PAT, port address translation)
Many-to-Many Overload: This is mode
maps multiple local IP addresses to shared
global IP addresses
Many-to-Many No Overload: This is
the mode maps each local IP
address to
unique global IP addresses
Server: This type allows you to specify
inside servers of different services behind
the NAT to be accessible to the outside
world.
This is the starting Inside Local IP Address (ILA).
Local IP addresses are N/A for Server port mapping
This is the end Inside Local IP Address (ILA). If your
rule is for all local IP addresses, then enter 0.0.0.0 as
the Local Start IP address and 255.255.255.255 as
the Local End IP address. This field is N/A for One-to-
one and Server mapping types
This is the starting Inside Public IP Address. Enter
0.0.0.0 here if you have a dynamic IP address from
your ISP
This is the ending Inside Public IP Address. This field
is N/A for One-to-one, Many-to-One and Server
mapping types
If you have disabled the NAT option in the WAN-ISP section,
the Virtual Server function will hence be invalid.
If the DHCP server option is enabled, you have to be very
careful in assigning the IP addresses of the virtual servers in
order to avoid conflicts. The easiest way of configuring Virtual
Servers is to manually assign static IP address to each virtual
server PC, with an address that does not fall into the range of
IP addresses that are to be issued by the DHCP server. You
