Black Box LRU4240 - Manual (Page 71)

Dual Trunk E1 Router
Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 59
Configuring NAT for single link ISP
Use the following procedure to configure your Dual Trunk E1 Router with dynamic NAT for
internet access to a single ISP
Table 6-6 Configuring NAT with single link ISP
Procedure Steps
Setting single link NAT
ISP to NET1 Example: You were assigned 14 global IP addresses starting from 100.120.30.02 by
your ISP for NET1
1.Select menu-$JAGlobal Map Table
2.Select Translated IP address field.
3.Enter 100.120.30.02 as the starting global IP address
4.Select subnet mask
5.Enter 28.
6.Set the interface field to NET1
Select the interface on which the network is connected to the ISP.
With 4230 Access Router select NET1.
With 4240 Dual Link Router select either NET1, NET2, or Bundle0
7.Set Action field to Add
Enter local networks that
require NAT translation 1.Select Menu-$JC
Add a row entry in this table for each network you want enable internet access.
2.Select local IP address field of an inactive entry (field set to Delete)
3.Enter the IP address that will be translated
4.Set subnet mask field of the translated network
5.Select interface field
6.Select the connection the translated network is connected to.
Enet0 for directly attached network
NET1, NET2 or Bndl0 for remotely attached network via WAN port.
Optional - Enable
overloading If you want to share a single global IP address or a range of global IP addresses
among multiple host.
1.Select menu-$JE
2.Set NAPT field to Enabled on the global interface (the network interface through
which the global networks can be reached, NET1 in this example)
Enable dynamic NAT 1.Select menu-$JE
2.Select unit NAT field and set it to enabled
3.Select the global network interface (NET1 in this example) NAT field and set it
to Enabled