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9.2.4 IP Address Mapping

 

 

 

Field

Meaning

 

Rule Index

Choose the rule number

 

Rule Type

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

 

Local Start IP

This is the starting Inside Local IP Address (ILA). Local IP

 

 

addresses are N/A for Server port mapping

 

Local End IP

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

 

Public Start IP

This is the starting Inside Public IP Address. Enter 0.0.0.0

 

 

here if you have a dynamic IP address from your ISP

 

 

 

 

 

Public End IP

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 can configure the virtual server IP address manually, but it must still be in the same subnet as the router.

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