This article shows how to configure LAN-to-LAN VPN between two Vigor Routers which use the same local IP range. The problem of building VPN tunnels to another router that uses the same IP range is that there will be two routes to the same IP subnet that conflicts with each other. If neither of them can change the IP subnet, the solution is to translate the local IP to an unused range for the VPN connection. Below describes how to do that on Vigor Routers.
1. Go to VPN and Remote Access >> LAN to LAN to create a VPN profile as follows: In Common Settings:
2. In Dial-In Settings:
3. In TCP/IP Network Settings:
1. Add a profile at VPN and Remote Access >> LAN to LAN as follows: In Common Settings:
2. Configure Dial-Out Settings:
3. Configure TCP/IP Network Settings:
4. After the configurations, Network Administrator may check the VPN Status via VPN and Remote Access >> Connection Management.
5. To reach a host behind Router A, a host behind Router B can use the IP address in subnet 192.168.129.0/255.255.255.0.
1. Go to VPN and Remote Access >> VPN Profile >> IPsec add a profile as follows:
2. In the Advanced tab, enable Apply NAT Policy, and enter a un-used IP range for Translated Local Network. Then, click Apply to save the profile.
3. Similarly, go to VPN and Remote Access >> VPN Profile >> IPsec and add a profile as follows:
4. In the Advanced tab, enable Apply NAT Policy, and give it a Translated Local Network which is different from that of Router A. Then, click Apply to save the profile.
5. To initiate the VPN, go to VPN and Remote Access >> Connection Management, select the Profile created and click Connect.
6. If all the settings are matched, the VPN connection will be established. In connection status, we will see the virtual network is the translated IP address.
7. And now we can access the remote network by the translated IP address.
Published On: 2016-05-25
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