.. _wireguard: ######### WireGuard ######### WireGuard is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography. See https://www.wireguard.com for more information. Configuration ============= WireGuard requires the generation of a keypair, a private key which will decrypt incoming traffic and a public key, which the peer(s) will use to encrypt traffic. Generate keypair ---------------- .. opcmd:: generate wireguard default-keypair It generates the keypair, that is its public and private part and stores it within VyOS. It will be used per default on any configured WireGuard interface, even if multiple interfaces are being configured. .. opcmd:: show wireguard keypairs pubkey default It shows the public key which needs to be shared with your peer(s). Your peer will encrypt all traffic to your system using this public key. .. code-block:: none vyos@vyos:~$ show wireguard keypairs pubkey default hW17UxY7zeydJNPIyo3UtGnBHkzTK/NeBOrDSIU9Tx0= Generate named keypair ---------------------- Named keypairs can be used on a interface basis, if configured. If multiple WireGuard interfaces are being configured, each can have their own keypairs. The commands below will generate 2 keypairs, which are not related to each other. .. code-block:: none vyos@vyos:~$ generate wireguard named-keypairs KP01 vyos@vyos:~$ generate wireguard named-keypairs KP02 Interface configuration ----------------------- The next step is to configure your local side as well as the policy based trusted destination addresses. If you only initiate a connection, the listen port and address/port is optional, if you however act as a server and endpoints initiate the connections to your system, you need to define a port your clients can connect to, otherwise it's randomly chosen and may make it difficult with firewall rules, since the port may be a different one when you reboot your system. You will also need the public key of your peer as well as the network(s) you want to tunnel (allowed-ips) to configure a WireGuard tunnel. The public key below is always the public key from your peer, not your local one. **local side** .. code-block:: none set interfaces wireguard wg01 address '10.1.0.1/24' set interfaces wireguard wg01 description 'VPN-to-wg02' set interfaces wireguard wg01 peer to-wg02 allowed-ips '10.2.0.0/24' set interfaces wireguard wg01 peer to-wg02 address '192.168.0.142:12345' set interfaces wireguard wg01 peer to-wg02 port '12345' set interfaces wireguard wg01 peer to-wg02 pubkey 'XMrlPykaxhdAAiSjhtPlvi30NVkvLQliQuKP7AI7CyI=' set interfaces wireguard wg01 port '12345' set protocols static interface-route 10.2.0.0/24 next-hop-interface wg01 The last step is to define an interface route for 10.2.0.0/24 to get through the WireGuard interface `wg01`. Multiple IPs or networks can be defined and routed, the last check is allowed-ips which either prevents or allows the traffic. .. note:: You can not assign the same allowed-ips statement to multiple WireGuard peers. This a a design decission. For more information please check the `WireGuard mailing list`_. To use a named key on an interface, the option private-key needs to be set. .. code-block:: none set interfaces wireguard wg01 private-key KP01 set interfaces wireguard wg02 private-key KP02 The command ``run show wireguard keypairs pubkey KP01`` will then show the public key, which needs to be shared with the peer. **remote side** .. code-block:: none set interfaces wireguard wg01 address '10.2.0.1/24' set interfaces wireguard wg01 description 'VPN-to-wg01' set interfaces wireguard wg01 peer to-wg02 allowed-ips '10.1.0.0/24' set interfaces wireguard wg01 peer to-wg02 address '192.168.0.124' set interfaces wireguard wg01 peer to-wg02 port '12345' set interfaces wireguard wg01 peer to-wg02 pubkey 'u41jO3OF73Gq1WARMMFG7tOfk7+r8o8AzPxJ1FZRhzk=' set interfaces wireguard wg01 port '12345' set protocols static interface-route 10.1.0.0/24 next-hop-interface wg01 Assure that your firewall rules allow the traffic, in which case you have a working VPN using WireGuard .. code-block:: none wg01# ping 10.2.0.1 PING 10.2.0.1 (10.2.0.1) 56(84) bytes of data. 64 bytes from 10.2.0.1: icmp_seq=1 ttl=64 time=1.16 ms 64 bytes from 10.2.0.1: icmp_seq=2 ttl=64 time=1.77 ms wg02# ping 10.1.0.1 PING 10.1.0.1 (10.1.0.1) 56(84) bytes of data. 64 bytes from 10.1.0.1: icmp_seq=1 ttl=64 time=4.40 ms 64 bytes from 10.1.0.1: icmp_seq=2 ttl=64 time=1.02 ms An additional layer of symmetric-key crypto can be used on top of the asymmetric crypto, which is optional. .. code-block:: none wg01# run generate wireguard preshared-key rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc= Copy the key, as it is not stored on the local file system. Make sure you distribute that key in a safe manner, it's a symmetric key, so only you and your peer should have knowledge of its content. .. code-block:: none wg01# set interfaces wireguard wg01 peer to-wg02 preshared-key 'rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc=' wg02# set interfaces wireguard wg01 peer to-wg01 preshared-key 'rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc=' Road Warrior Example -------------------- With WireGuard, a Road Warrior VPN config is similar to a site-to-site VPN. It just lacks the ``address`` and ``port`` statements. In the following example, the IPs for the remote clients are defined in the peers. This would allow the peers to interact with one another. .. code-block:: none wireguard wg0 { address 10.172.24.1/24 address 2001:DB8:470:22::1/64 description RoadWarrior peer MacBook { allowed-ips 10.172.24.30/32 allowed-ips 2001:DB8:470:22::30/128 persistent-keepalive 15 pubkey F5MbW7ye7DsoxdOaixjdrudshjjxN5UdNV+pGFHqehc= } peer iPhone { allowed-ips 10.172.24.20/32 allowed-ips 2001:DB8:470:22::30/128 persistent-keepalive 15 pubkey BknHcLFo8nOo8Dwq2CjaC/TedchKQ0ebxC7GYn7Al00= } port 2224 } The following is the config for the iPhone peer above. It's important to note that the ``AllowedIPs`` setting directs all IPv4 and IPv6 traffic through the connection. .. code-block:: none [Interface] PrivateKey = ARAKLSDJsadlkfjasdfiowqeruriowqeuasdf= Address = 10.172.24.20/24, 2001:DB8:470:22::20/64 DNS = 10.0.0.53, 10.0.0.54 [Peer] PublicKey = RIbtUTCfgzNjnLNPQ/ulkGnnB2vMWHm7l2H/xUfbyjc= AllowedIPs = 0.0.0.0/0, ::/0 Endpoint = 192.0.2.1:2224 PersistentKeepalive = 25 This MacBook peer is doing split-tunneling, where only the subnets local to the server go over the connection. .. code-block:: none [Interface] PrivateKey = 8Iasdfweirousd1EVGUk5XsT+wYFZ9mhPnQhmjzaJE6Go= Address = 10.172.24.30/24, 2001:DB8:470:22::30/64 [Peer] PublicKey = RIbtUTCfgzNjnLNPQ/ulkGnnB2vMWHm7l2H/xUfbyjc= AllowedIPs = 10.172.24.30/24, 2001:DB8:470:22::/64 Endpoint = 192.0.2.1:2224 PersistentKeepalive = 25 Operational commands ==================== **Show interface status** .. code-block:: none vyos@wg01# run show interfaces wireguard wg01 interface: wg1 description: VPN-to-wg01 address: 10.2.0.1/24 public key: RIbtUTCfgzNjnLNPQ/asldkfjhaERDFl2H/xUfbyjc= private key: (hidden) listening port: 53665 peer: to-wg02 public key: u41jO3OF73Gq1WARMMFG7tOfk7+r8o8AzPxJ1FZRhzk= latest handshake: 0:01:20 status: active endpoint: 192.168.0.124:12345 allowed ips: 10.2.0.0/24 transfer: 42 GB received, 487 MB sent persistent keepalive: every 15 seconds RX: bytes packets errors dropped overrun mcast 45252407916 31192260 0 244493 0 0 TX: bytes packets errors dropped carrier collisions 511649780 5129601 24465 0 0 0 **Show public key of the default key** .. code-block:: none vyos@wg01# run show wireguard keypair pubkey default FAXCPb6EbTlSH5200J5zTopt9AYXneBthAySPBLbZwM= **Show public key of a named key** .. code-block:: none vyos@wg01# run show wireguard keypair pubkey KP01 HUtsu198toEnm1poGoRTyqkUKfKUdyh54f45dtcahDM= **Delete wireguard keypairs** .. code-block:: none vyos@wg01# wireguard keypair default .. _`WireGuard mailing list`: https://lists.zx2c4.com/pipermail/wireguard/2018-December/003704.html