IPSec Tunnels

1 IPSec Tunnels

This modules can build IPSec tunnels between multiple WFilter ROS networks, and make a secure site-to-site VPN. The number of IPSec Tunnels depends on your hardware performance, there is no software limit on the tunnels number.

2 IPSec Tunnel Settings

Before you setup a IPSec tunnel, you need to design your tunnels. Only a network with a static internet ip address can act as a tunnel server. For example:

• Suppose you have 3 network: A, B, C.
• A has a static public IP, B and C ip addresses are dynamic.

The solution will be:

• Create a tunnel in A network, set "Remote IP" to "Any".
• Create tunnels in B and C networks, set "Remote IP" to A's public ip address.
• Now the tunnels are ready. A, B, C now are in a VPN network. The tunnels are between A&B and A&C. Since there is no tunnel between B and C, B and C can not visit each other.

Description of tunnel settings:

• Name: tunnel name.
• Interface: WAN interface to setup the tunnel.
• Local Subnet: local subnet to be connected with the tunnel.
• Remote IP: another side of the tunnel, "Any" to allow any others to connect.
• Remote Subnet: remote LAN subnet which will be forwarded to the tunnel.
• PreShared Key: tunnel secret key. With a correct key, the tunnel can not be established.
• Start: Manually or Automatically.
• IKE, ESP: algorithm for authentication and transfer. Both sides of the tunnel shall have the same algorithm.

Server side settings examples:

Client side settings examples:

Notice:

• Access of tunnels are also applied with firewall rules. For example, if you want to block VPN tunnels users from accessing a local server, you need to setup a firewall rule to block the target server ip from WAN interface.
• If you enable DMZ or "Static NAT", please add IPSec port "500,4500" to "port exception". Otherwise, IPSec connections can not be established.
• If the WAN interface has multiple static ip addresses, IPSec only listens in the first IP address.

3 Tunnel Status

Move your mouse into the "state" icon, you will see the tunnel status and connected clients.

800px