Netopia 3346N-ENT User Guide (en)

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Multiple Network Address Translation   4-9
NAT rules
The following rules apply to assigning NAT ranges and ser ver lists:
Static public address ranges must not overlap other static, PAT, public addresses, or the public address 
assigned to the Router’s WAN inter face.
A PAT public address must not overlap any static address ranges. It may be the same as another PAT 
address or ser ver list address, but the por t range must not overlap.
You configure the ranges of exterior addresses by first adding public ranges. 
Select Add Public Range and press Return. 
The Add NAT Public Range screen appears.
Select Range Name and give a descriptive name to this range.
Select Type and from the pop-up menu, assign its type. Options are static, dynamic, or pat (the default).
If you choose pat as the range type, select Public Address and enter the exterior IP address in the 
range you want to assign. Select First and Last Public Port and enter the first and last exterior por ts 
in the range. These are the por ts that will be used for traffic initiated from the private LAN to the out-
side world.
Note: For PAT map lists and ser ver lists, if you use the Public Address 0.0.0.0, the list will acquire its public IP 
address from the WAN IP address specified by your WAN IP configuration in the Connection Profile. If that is a 
static IP address, then the PAT map list and ser ver lists will acquire that address. If it is a negotiated IP 
address, such as may be assigned via DHCP or PPP, the PAT map list and ser ver lists will acquire that address 
each time it is negotiated.
If you choose dynamic as the range type, a new menu item, First Public Address, becomes visible. 
Select First Public Address and enter the first exterior IP address in the range you want to assign. 
Select Last Public Address and enter an IP address at the end of the range.
If you choose static as the range type, a new menu item, First Public Address, becomes visible. 
                         Add NAT Public Range
         Range Name:                        my_first_range
         Type...                            pat
         Public Address:                    206.1.1.6
         First Public Port:                 49152
         Last Public Port:                  65535
         ADD NAT PUBLIC RANGE               CANCEL