PLANET CS-2001 - Manual (Page 261)

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11.1.1 Using Two CS-2001 Devices to Mutually Access the
Resources of Two Subnets via an IPSec VPN Connection
Prerequisite Setup (Note: IP addresses used as examples only)
A Company: Configure Port1 as LAN1(192.168.10.1). IP address range:
192.168.10.x/24.
Configure Port2 as WAN1(61.11.11.11) and connect it to the ADSL
Termination Unit Remote (ATUR) to access the Internet.
B Company: Configure Port1 as LAN1 (192.168.20.1). IP address range
192.168.20.x/24.
Configure Port2 as WAN1(211.22.22.22) and connect it to the ADSL
Termination Unit Remote (ATUR) to access the Internet.
Multiple subnet: 192.168.85.1. IP address range: 192.168.85.x/24
This example uses two CS-2001 devices to establish VPN connection between A
Company and B Company.
For A Company, set as below:
Step 1. Go to Policy Object > VPN > IPSec Autokey, and then click New Entry.
（Figure 11-18）
Figure 11-18 IPSec Autokey Screen
Step 2. Enter IPSec tunnel in the Name field. Select Port2 (WAN1) for WAN
Interface. （Figure 11-19）
Figure 11-19 Name and WAN Interface Settings