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¶
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.
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.
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
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'
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 route 10.2.0.0/24 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.
注解
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.
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
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 route 10.1.0.0/24 interface wg01
Assure that your firewall rules allow the traffic, in which case you have a working VPN using WireGuard
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.
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.
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.
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.
[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.
[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
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
vyos@wg01# run show wireguard keypair pubkey default
FAXCPb6EbTlSH5200J5zTopt9AYXneBthAySPBLbZwM=
Show public key of a named key
vyos@wg01# run show wireguard keypair pubkey KP01
HUtsu198toEnm1poGoRTyqkUKfKUdyh54f45dtcahDM=
Delete wireguard keypairs
vyos@wg01# wireguard keypair default