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388 lines
14 KiB
ReStructuredText
388 lines
14 KiB
ReStructuredText
.. _wireguard:
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#########
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WireGuard
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#########
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WireGuard is an extremely simple yet fast and modern VPN that utilizes
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state-of-the-art cryptography. See https://www.wireguard.com for more
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information.
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****************
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Site to Site VPN
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****************
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This diagram corresponds with the example site to site configuration below.
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.. figure:: /_static/images/wireguard_site2site_diagram.jpg
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*************
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Configuration
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*************
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********
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Keypairs
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********
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WireGuard requires the generation of a keypair, which includes a private
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key to decrypt incoming traffic, and a public key for peer(s) to encrypt
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traffic.
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Generate Keypair
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================
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.. opcmd:: generate wireguard default-keypair
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It generates the keypair, which includes the public and private parts,
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and stores it within VyOS. It will be used per default on any configured
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WireGuard interface, even if multiple interfaces are being configured.
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.. opcmd:: show wireguard keypairs pubkey default
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It shows the public key to be shared with your peer(s). Your peer will
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encrypt all traffic to your system using this public key.
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.. code-block:: none
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vyos@vyos:~$ show wireguard keypairs pubkey default
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hW17UxY7zeydJNPIyo3UtGnBHkzTK/NeBOrDSIU9Tx0=
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Generate Named Keypair
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======================
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Named keypairs can be used on a interface basis when configured. If
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multiple WireGuard interfaces are being configured, each can have their
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own keypairs.
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.. opcmd:: generate wireguard named-keypairs <name>
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The commands below generates 2 keypairs unrelated to each other.
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.. code-block:: none
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vyos@vyos:~$ generate wireguard named-keypairs KP01
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vyos@vyos:~$ generate wireguard named-keypairs KP02
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***********************
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Interface configuration
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***********************
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The next step is to configure your local side as well as the policy
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based trusted destination addresses. If you only initiate a connection,
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the listen port and address/port is optional; however, if you act as a
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server and endpoints initiate the connections to your system, you need to
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define a port your clients can connect to, otherwise the port is randomly
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chosen and may make connection difficult with firewall rules, since the port
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may be different each time the system is rebooted.
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You will also need the public key of your peer as well as the network(s)
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you want to tunnel (allowed-ips) to configure a WireGuard tunnel. The
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public key below is always the public key from your peer, not your local
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one.
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**local side - commands**
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.. code-block:: none
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set interfaces wireguard wg01 address '10.1.0.1/30'
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set interfaces wireguard wg01 description 'VPN-to-wg02'
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set interfaces wireguard wg01 peer to-wg02 allowed-ips '192.168.2.0/24'
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set interfaces wireguard wg01 peer to-wg02 address '<Site1 Pub IP>'
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set interfaces wireguard wg01 peer to-wg02 port '51820'
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set interfaces wireguard wg01 peer to-wg02 pubkey 'XMrlPykaxhdAAiSjhtPlvi30NVkvLQliQuKP7AI7CyI='
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set interfaces wireguard wg01 port '51820'
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set protocols static interface-route 192.168.2.0/24 next-hop-interface wg01
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**local side - annotated commands**
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.. code-block:: none
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set interfaces wireguard wg01 address '10.1.0.1/30' # Address of the wg01 tunnel interface.
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set interfaces wireguard wg01 description 'VPN-to-wg02'
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set interfaces wireguard wg01 peer to-wg02 allowed-ips '192.168.2.0/24' # Subnets that are allowed to travel over the tunnel
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set interfaces wireguard wg01 peer to-wg02 address '<Site2 Pub IP>' # Public IP of the peer
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set interfaces wireguard wg01 peer to-wg02 port '58120' # Port of the Peer
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set interfaces wireguard wg01 peer to-wg02 pubkey '<pubkey>' # Public Key of the Peer
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set interfaces wireguard wg01 port '51820' # Port of own server
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set protocols static interface-route 192.168.2.0/24 next-hop-interface wg01 # Static route to remote subnet
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The last step is to define an interface route for 192.168.2.0/24 to get
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through the WireGuard interface `wg01`. Multiple IPs or networks can be
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defined and routed. The last check is allowed-ips which either prevents
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or allows the traffic.
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.. note:: You can not assign the same allowed-ips statement to multiple
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WireGuard peers. This a a design decision. For more information please
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check the `WireGuard mailing list`_.
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.. cfgcmd:: set interfaces wireguard <interface> private-key <name>
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To use a named key on an interface, the option private-key needs to be
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set.
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.. code-block:: none
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set interfaces wireguard wg01 private-key KP01
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The command :opcmd:`show wireguard keypairs pubkey KP01` will then show the
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public key, which needs to be shared with the peer.
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**remote side - commands**
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.. code-block:: none
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set interfaces wireguard wg01 address '10.1.0.2/30'
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set interfaces wireguard wg01 description 'VPN-to-wg01'
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set interfaces wireguard wg01 peer to-wg02 allowed-ips '192.168.1.0/24'
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set interfaces wireguard wg01 peer to-wg02 address '<Site1 Pub IP>'
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set interfaces wireguard wg01 peer to-wg02 port '51820'
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set interfaces wireguard wg01 peer to-wg02 pubkey 'u41jO3OF73Gq1WARMMFG7tOfk7+r8o8AzPxJ1FZRhzk='
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set interfaces wireguard wg01 port '51820'
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set protocols static route 192.168.1.0/24 interface wg01
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**remote side - annotated commands**
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.. code-block:: none
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set interfaces wireguard wg01 address '10.1.0.2/30' # Address of the wg01 tunnel interface.
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set interfaces wireguard wg01 description 'VPN-to-wg01'
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set interfaces wireguard wg01 peer to-wg02 allowed-ips '192.168.1.0/24' # Subnets that are allowed to travel over the tunnel
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set interfaces wireguard wg01 peer to-wg02 address 'Site1 Pub IP' # Public IP address of the Peer
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set interfaces wireguard wg01 peer to-wg02 port '51820' # Port of the Peer
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set interfaces wireguard wg01 peer to-wg02 pubkey '<pubkey>' # Public key of the Peer
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set interfaces wireguard wg01 port '51820' # Port of own server
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set protocols static route 192.168.1.0/24 interface wg01 # Static route to remote subnet
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*******************
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Firewall Exceptions
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*******************
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For the WireGuard traffic to pass through the WAN interface, you must create a firewall exception.
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.. code-block:: none
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set firewall name OUTSIDE_LOCAL rule 10 action accept
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set firewall name OUTSIDE_LOCAL rule 10 description 'Allow established/related'
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set firewall name OUTSIDE_LOCAL rule 10 state established enable
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set firewall name OUTSIDE_LOCAL rule 10 state related enable
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set firewall name OUTSIDE_LOCAL rule 20 action accept
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set firewall name OUTSIDE_LOCAL rule 20 description WireGuard_IN
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set firewall name OUTSIDE_LOCAL rule 20 destination port 51820
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set firewall name OUTSIDE_LOCAL rule 20 log enable
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set firewall name OUTSIDE_LOCAL rule 20 protocol udp
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set firewall name OUTSIDE_LOCAL rule 20 source
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You should also ensure that the OUTISDE_LOCAL firewall group is applied to the WAN interface and a direction (local).
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.. code-block:: none
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set interfaces ethernet eth0 firewall local name 'OUTSIDE-LOCAL'
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Assure that your firewall rules allow the traffic, in which case you have a working VPN using WireGuard.
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.. code-block:: none
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wg01# ping 192.168.1.1
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PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
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64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1.16 ms
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64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.77 ms
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wg02# ping 192.168.2.1
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PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
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64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=4.40 ms
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64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=1.02 ms
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An additional layer of symmetric-key crypto can be used on top of the
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asymmetric crypto. This is optional.
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.. code-block:: none
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wg01# run generate wireguard preshared-key
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rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc=
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Copy the key, as it is not stored on the local filesystem. Because it
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is a symmetric key, only you and your peer should have knowledge of
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its content. Make sure you distribute the key in a safe manner,
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.. code-block:: none
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wg01# set interfaces wireguard wg01 peer to-wg02 preshared-key 'rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc='
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wg02# set interfaces wireguard wg01 peer to-wg01 preshared-key 'rvVDOoc2IYEnV+k5p7TNAmHBMEGTHbPU8Qqg8c/sUqc='
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***********************************
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Remote Access "RoadWarrior" Example
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***********************************
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With WireGuard, a Road Warrior VPN config is similar to a site-to-site
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VPN. It just lacks the ``address`` and ``port`` statements.
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In the following example, the IPs for the remote clients are defined in
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the peers. This allows the peers to interact with one another.
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.. code-block:: none
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wireguard wg0 {
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address 10.172.24.1/24
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address 2001:DB8:470:22::1/64
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description RoadWarrior
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peer MacBook {
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allowed-ips 10.172.24.30/32
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allowed-ips 2001:DB8:470:22::30/128
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persistent-keepalive 15
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pubkey F5MbW7ye7DsoxdOaixjdrudshjjxN5UdNV+pGFHqehc=
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}
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peer iPhone {
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allowed-ips 10.172.24.20/32
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allowed-ips 2001:DB8:470:22::20/128
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persistent-keepalive 15
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pubkey BknHcLFo8nOo8Dwq2CjaC/TedchKQ0ebxC7GYn7Al00=
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}
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port 2224
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}
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The following is the config for the iPhone peer above. It's important to
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note that the ``AllowedIPs`` wildcard setting directs all IPv4 and IPv6 traffic
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through the connection.
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.. code-block:: none
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[Interface]
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PrivateKey = ARAKLSDJsadlkfjasdfiowqeruriowqeuasdf=
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Address = 10.172.24.20/24, 2001:DB8:470:22::20/64
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DNS = 10.0.0.53, 10.0.0.54
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[Peer]
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PublicKey = RIbtUTCfgzNjnLNPQ/ulkGnnB2vMWHm7l2H/xUfbyjc=
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AllowedIPs = 0.0.0.0/0, ::/0
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Endpoint = 192.0.2.1:2224
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PersistentKeepalive = 25
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However, split-tunneling can be achieved by specifing the remote subnets.
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This ensures that only traffic destined for the remote site is sent over the tunnel.
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All other traffic is unaffected.
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.. code-block:: none
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[Interface]
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PrivateKey = 8Iasdfweirousd1EVGUk5XsT+wYFZ9mhPnQhmjzaJE6Go=
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Address = 10.172.24.30/24, 2001:DB8:470:22::30/64
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[Peer]
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PublicKey = RIbtUTCfgzNjnLNPQ/ulkGnnB2vMWHm7l2H/xUfbyjc=
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AllowedIPs = 10.172.24.30/24, 2001:DB8:470:22::/64
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Endpoint = 192.0.2.1:2224
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PersistentKeepalive = 25
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********************
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Operational Commands
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********************
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Status
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======
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.. opcmd:: show interfaces wireguard
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Get a list of all wireguard interfaces
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.. code-block:: none
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Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
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Interface IP Address S/L Description
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--------- ---------- --- -----------
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wg0 10.0.0.1/24 u/u
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.. opcmd:: show interfaces wireguard <interface>
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Show general information about specific WireGuard interface
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.. code-block:: none
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vyos@vyos:~$ show interfaces wireguard wg01
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interface: wg0
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address: 10.0.0.1/24
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public key: h1HkYlSuHdJN6Qv4Hz4bBzjGg5WUty+U1L7DJsZy1iE=
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private key: (hidden)
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listening port: 41751
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RX: bytes packets errors dropped overrun mcast
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0 0 0 0 0 0
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TX: bytes packets errors dropped carrier collisions
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0 0 0 0 0 0
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***************
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Encryption Keys
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***************
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.. opcmd:: show wireguard keypair pubkey <name>
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Show public key portion for specified key. This can be either the ``default``
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key, or any other named key-pair.
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The ``default`` keypair
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.. code-block:: none
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vyos@vyos:~$ show wireguard keypair pubkey default
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FAXCPb6EbTlSH5200J5zTopt9AYXneBthAySPBLbZwM=
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Name keypair ``KP01``
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.. code-block:: none
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vyos@vyos:~$ show wireguard keypair pubkey KP01
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HUtsu198toEnm1poGoRTyqkUKfKUdyh54f45dtcahDM=
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.. opcmd:: delete wireguard keypair pubkey <name>
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Delete a keypair, this can be either the ``default`` key, or any other
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named key-pair.
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.. code-block:: none
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vyos@vyos:~$ delete wireguard keypair default
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***********************************
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Remote Access "RoadWarrior" clients
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***********************************
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Some users tend to connect their mobile devices using WireGuard to their VyOS
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router. To ease deployment one can generate a "per mobile" configuration from
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the VyOS CLI.
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.. warning:: From a security perspective it is not recommended to let a third
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party create and share the private key for a secured connection. You should create the
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private portion on your own and only hand out the public key. Please keep this
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in mind when using this convenience feature.
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.. opcmd:: generate wireguard client-config <name> interface <interface> server <ip|fqdn> address <client-ip>
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Using this command you will create a new client configuration which can
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connect to ``interface`` on this router. The public key from the specified
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interface is automatically extracted and embedded into the configuration.
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The command also generates a configuration snipped which can be copy/pasted
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into the VyOS CLI if needed. The supplied ``<name>`` on the CLI will become
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the peer name in the snippet.
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In addition you will specifiy the IP address or FQDN for the client where it
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will connect to. The address parameter can be used up to two times and is used
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to assign the client its specific IPv4 (/32) or IPv6 (/128) address.
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.. figure:: /_static/images/wireguard_qrcode.jpg
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:alt: WireGuard Client QR code
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.. stop_vyoslinter
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.. _`WireGuard mailing list`: https://lists.zx2c4.com/pipermail/wireguard/2018-December/003704.html
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.. start_vyoslinter
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