Dual Trunk E1 Router

Static NAT - To map a unregistered IP address to a registered IP address. This is useful to enable outside hosts to access an internal IP host of server.

Dynamic NAT - To share dynamically a range of global addresses among internal hosts to access the internet. Translation occurs when traffic takes place.

Overloading - If the number of global addresses available is less than number of hosts which need to access internet at the same time, then the port field also can be used for translation. Unregistered IP addresses are mapped to one or many registered IP addresses.

NAT Configuration menus

NAT is configurable through the TUI menu $J accessible direcly or remotely via Telnet.

 

Table 6-5 NAT configuration menus

 

 

Menu

Description

 

 

Menu-$JA Global Map table

To configure the global IP address ranges to allocate through NAT.

 

 

Select Add command

Add the global IP addresses to NAT.

 

 

Menu-$JB NAT static table

To configure the one-to-one mapping of global IP addresses to local IP

 

addresses.

 

 

Menu-$C-Local address table

To configure the networks that require NAT translation. If the table is empty

 

no NAT translation will take place.

 

NAT will translate if the packet source or destination IP address is included

 

in the Local table.

 

NAT will not translate if both the packet source AND the destination IP

 

addresses are included in the local table. This is useful for network scenarios

 

where filtering NAT, based on source and destination addres, is required.

 

 

Menu-$JE NAT Interface

To enable or disable NAT and NAPT per WAN interface.

configuration

 

 

 

Menu-$JF NAT Dynamic entries

To verify dynamic operations. You can view the dynamic alloction of global

 

IP addresses to local host as traffic takes place.

 

 

58

SALES: 0870 90 10 750

Dual Trunk E1 Router User’s Guide

Page 70
Image 70
Black Box LRU4240 manual NAT Configuration menus, Menu Description