Using WireGuard for Site-to-Site VPN
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7 months ago
Published on May 03, 2024
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Table of Contents
Tutorial: Setting up Site-to-Site VPN using WireGuard
Step 1: Introduction to WireGuard VPN
- WireGuard is known for its simplicity, speed, and security in the world of virtual private networks.
- It allows for interconnecting three networks using its innovative technology.
Step 2: Network Topology Setup
- Set up a mesh network where each node is interconnected with every other node using point-to-point links.
- Assign IP addresses to each node in the network (Node 1: 10.1, Node 2: 10.2, Node 3: 10.3).
Step 3: Generating WireGuard Keys
- Update packages list with
apt update
. - Install WireGuard with
apt install wireguard
. - Generate public and private keys for each server using the
wg genkey
andwg pubkey
commands.
Step 4: Configuring WireGuard Interface
- Create a configuration file for the WireGuard interface (e.g.,
wg0
). - Define interface address, listen port, and peer configurations in the interface file.
Step 5: Peer Configuration
- Share public keys with other nodes to establish connections securely.
- Define allowed IPs and exchange keys with each peer node in the configuration file.
Step 6: Endpoint Configuration
- Add an endpoint field to each peer to specify the IP address and port for sending packets.
- Update the endpoint field to the most recent source IP and port for correctly authenticated packets.
Step 7: Testing Connectivity
- Verify connectivity by pinging the VPN IPs of other nodes from each node in the network.
- Ensure that all nodes can communicate over the WireGuard VPN.
Step 8: Enabling Packet Forwarding
- Enable packet forwarding on the servers by uncommenting forwarding for IPv4 in the sysctl config.
- Update the routing table on each node to include the networks of other nodes.
Step 9: Final Testing and Configuration
- Update the WireGuard configuration on each node to include the peer sections for all interconnected networks.
- Verify routing rules for all networks are correctly set up on each node.
Step 10: Testing Internet Access
- Configure NAT on the servers to allow client machines to access the internet.
- Test internet access on the client machines to ensure the setup is working correctly.
By following these steps, you can successfully set up a site-to-site VPN using WireGuard for enhanced security and connectivity between multiple networks.