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#Easyvpn github how to

In the server configuration, when the network interface wants to send a packet to a peer (a client), it looks at that packet's destination IP and compares it to each peer's list of allowed IPs to see which peer to send it to. For example, when a packet is received by the server from peer gN65BkIK., after being decrypted and authenticated, if its source IP is 10.10.10.230, then it's allowed onto the interface otherwise it's dropped. In the server configuration, each peer (a client) will be able to send packets to the network interface with a source IP matching his corresponding list of allowed IPs. PublicKey = HIgo9xNzJMWLKASShiTqIybxZ0U3wGLiUeJ1PKf8ykw= PrivateKey = gI6EdUSYvn8ugXOt8QQD6Yc+JyiZxIhp3GInSWRfWGE= They can be passed around for use in configuration files by any out-of-band method, similar to how one might send their SSH public key to a friend for access to a shell server.įor example, a server computer might have this configuration: Public keys are short and simple, and are used by peers to authenticate each other. Each network interface has a private key and a list of peers. Cryptokey RoutingĪt the heart of WireGuard is a concept called Cryptokey Routing, which works by associating public keys with a list of tunnel IP addresses that are allowed inside the tunnel. If not, drop it.īehind the scenes there is much happening to provide proper privacy, authenticity, and perfect forward secrecy, using state-of-the-art cryptography.

If so, accept the packet on the interface.

Is peer LMNOPQRS allowed to be sending us packets as 192.168.43.89?

Once decrypted, the plain-text packet is from 192.168.43.89.

Okay, let's remember that peer LMNOPQRS's most recent Internet endpoint is 98.139.183.24:7361 using UDP.

It decrypted and authenticated properly for peer LMNOPQRS.

I just got a packet from UDP port 7361 on host 98.139.183.24.

When the interface receives a packet, this happens:

Send encrypted bytes from step 2 over the Internet to 216.58.211.110:53133 using UDP.

What is the remote endpoint of peer ABCDEFGH? Let me look.

Encrypt entire IP packet using peer ABCDEFGH's public key.

(Or if it's not for any configured peer, drop the packet.) When the interface sends a packet to a peer, it does the following: WireGuard associates tunnel IP addresses with public keys and remote endpoints. This interface acts as a tunnel interface. The specific WireGuard aspects of the interface are configured using the wg(8) tool. This network interface can then be configured normally using ifconfig(8) or ip-address(8), with routes for it added and removed using route(8) or ip-route(8), and so on with all the ordinary networking utilities. WireGuard works by adding a network interface (or multiple), like eth0 or wlan0, called wg0 (or wg1, wg2, wg3, etc). In contrast, it more mimics the model of SSH and Mosh both parties have each other's public keys, and then they're simply able to begin exchanging packets through the interface. All issues of key distribution and pushed configurations are out of scope of WireGuard these are issues much better left for other layers, lest we end up with the bloat of IKE or OpenVPN. You add a WireGuard interface, configure it with your private key and your peers' public keys, and then you send packets across it. WireGuard securely encapsulates IP packets over UDP.

If you intend to implement WireGuard for a new platform, please read the cross-platform notes. If you're interested in the internal inner workings, you might be interested in the brief summary of the protocol, or go more in depth by reading the technical whitepaper, which goes into more detail on the protocol, cryptography, and fundamentals.

#Easyvpn github how to

You then may progress to installation and reading the quickstart instructions on how to use it.

If you'd like a general conceptual overview of what WireGuard is about, read onward here. WireGuard is the result of a lengthy and thoroughly considered academic process, resulting in the technical whitepaper, an academic research paper which clearly defines the protocol and the intense considerations that went into each decision.