.. _vpn-openconnect: ########### OpenConnect ########### OpenConnect-compatible server feature is available from this release. Openconnect VPN supports SSL connection and offers full network access. SSL VPN network extension connects the end-user system to the corporate network with access controls based only on network layer information, such as destination IP address and port number. So, it provides safe communication for all types of device traffic across public networks and private networks, also encrypts the traffic with SSL protocol. The remote user will use the openconnect client to connect to the router and will receive an IP address from a VPN pool, allowing full access to the network. ************* Configuration ************* SSL Certificates ================ We need to generate the certificate which authenticates users who attempt to access the network resource through the SSL VPN tunnels. The following commands will create a self signed certificates and will be stored in configuration: .. code-block:: none run generate pki ca install run generate pki certificate sign install We can also create the certificates using Cerbort which is an easy-to-use client that fetches a certificate from Let's Encrypt an open certificate authority launched by the EFF, Mozilla, and others and deploys it to a web server. .. code-block:: none sudo certbot certonly --standalone --preferred-challenges http -d Server Configuration ==================== .. code-block:: none set vpn openconnect authentication local-users username password set vpn openconnect authentication mode set vpn opneconnect network-settings client-ip-settings subnet set vpn openconnect network-settings name-server
set vpn openconnect network-settings name-server
set vpn openconnect ssl ca-certificate set vpn openconnect ssl certificate set vpn openconnect ssl passphrase 2FA OTP support ==================== Instead of password only authentication, 2FA password authentication + OTP key can be used. Alternatively, OTP authentication only, without a password, can be used. To do this, an OTP configuration must be added to the configuration above: .. code-block:: none set vpn openconnect authentication mode local set vpn openconnect authentication local-users username otp set vpn openconnect authentication local-users username interval set vpn openconnect authentication local-users username otp-length set vpn openconnect authentication local-users username token-type For generating an OTP key in VyOS, you can use the CLI command (operational mode): .. code-block:: none generate openconnect username otp-key hotp-time ************ Verification ************ .. code-block:: none vyos@vyos:~$ sh openconnect-server sessions interface username ip remote IP RX TX state uptime ----------- ---------- ------------- ----------- ------- --------- --------- -------- sslvpn0 tst 172.20.20.198 192.168.6.1 0 bytes 152 bytes connected 3s .. note:: It is compatible with Cisco (R) AnyConnect (R) clients. ******* Example ******* SSL Certificates generation =========================== Follow the instructions to generate CA cert (in configuration mode): .. code-block:: none vyos@vyos# run generate pki ca install ca-ocserv Enter private key type: [rsa, dsa, ec] (Default: rsa) Enter private key bits: (Default: 2048) Enter country code: (Default: GB) US Enter state: (Default: Some-State) Delaware Enter locality: (Default: Some-City) Mycity Enter organization name: (Default: VyOS) MyORG Enter common name: (Default: vyos.io) oc-ca Enter how many days certificate will be valid: (Default: 1825) 3650 Note: If you plan to use the generated key on this router, do not encrypt the private key. Do you want to encrypt the private key with a passphrase? [y/N] N 2 value(s) installed. Use "compare" to see the pending changes, and "commit" to apply. [edit] Follow the instructions to generate server cert (in configuration mode): .. code-block:: none vyos@vyos# run generate pki certificate sign ca-ocserv install srv-ocserv Do you already have a certificate request? [y/N] N Enter private key type: [rsa, dsa, ec] (Default: rsa) Enter private key bits: (Default: 2048) Enter country code: (Default: GB) US Enter state: (Default: Some-State) Delaware Enter locality: (Default: Some-City) Mycity Enter organization name: (Default: VyOS) MyORG Enter common name: (Default: vyos.io) oc-srv Do you want to configure Subject Alternative Names? [y/N] N Enter how many days certificate will be valid: (Default: 365) 1830 Enter certificate type: (client, server) (Default: server) Note: If you plan to use the generated key on this router, do not encrypt the private key. Do you want to encrypt the private key with a passphrase? [y/N] N 2 value(s) installed. Use "compare" to see the pending changes, and "commit" to apply. [edit] Each of the install command should be applied to the configuration and commited before using under the openconnect configuration: .. code-block:: none vyos@vyos# commit [edit] vyos@vyos# save Saving configuration to '/config/config.boot'... Done [edit] Openconnect Configuration ========================= Simple setup with one user added and password authentication: .. code-block:: none set vpn openconnect authentication local-users username tst password 'OC_bad_Secret' set vpn openconnect authentication mode local password set vpn openconnect network-settings client-ip-settings subnet '172.20.20.0/24' set vpn openconnect network-settings name-server '10.1.1.1' set vpn openconnect network-settings name-server '10.1.1.2' set vpn openconnect ssl ca-certificate 'ca-ocserv' set vpn openconnect ssl certificate 'srv-ocserv' Adding a 2FA with an OTP-key ============================ First the OTP keys must be generated and sent to the user and to the configuration: .. code-block:: none vyos@vyos:~$ generate openconnect username tst otp-key hotp-time # You can share it with the user, he just needs to scan the QR in his OTP app # username: tst # OTP KEY: 5PA4SGYTQSGOBO3H3EQSSNCUNZAYAPH2 # OTP URL: otpauth://totp/tst@vyos?secret=5PA4SGYTQSGOBO3H3EQSSNCUNZAYAPH2&digits=6&period=30 █████████████████████████████████████████ █████████████████████████████████████████ ████ ▄▄▄▄▄ █▀ ██▄▀ ▄█▄▀▀▄▄▄▄██ ▄▄▄▄▄ ████ ████ █ █ █▀ █▄▄▀▀▀▄█ ▄▄▀▄ █ █ █ ████ ████ █▄▄▄█ █▀█▀▄▄▀ ▄▀ █▀ ▀▄██ █▄▄▄█ ████ ████▄▄▄▄▄▄▄█▄█▄▀ ▀▄█ ▀ ▀ ▀ █▄█▄▄▄▄▄▄▄████ ████ ▄▄▄▀▄▄ ▄███▀▄▀█▄██▀ ▀▄ ▀▄█ ▀ ▀████ ████ ▀▀ ▀ ▄█▄ ▀ ▀▄ ▄█▀ ▄█ ▄▀▀▄██ █████ ████▄ █▄▀▀▄█▀ ▀█▄█▄▄▄▄ ▄▀█▀▀█ ▀ ▄ ▀█▀████ █████ ▀█▀▄▄ █ ▀▄▄ ▄█▄ ▀█▀▀ █▀ ▄█████ ████▀██▀█▄▄ ▀▀▀▀█▄▀ ▀█▄▄▀▀▀ ▀ ▀█▄██▀▀████ ████▄ ▄ ▄▀▄██▀█ ▄ ▀▄██ ▄▄ ▀▀▄█▄██ ▄█████ ████▀▀ ▄▀ ▄ ▀█▀█▀█ █▀█▄▄▀█▀█▄██▄▄█ ▀████ ████ █ ▀█▄▄█▄ ▀ ▄▄▀▀ ▀ █▄█▀████ █▀ ▀████ ████▄██▄██▄█▀ ▄▀ ▄▄▀▄ ▄▀█ ▄ ▄▄▄ ▀█▄ ████ ████ ▄▄▄▄▄ █▄ ▀█▄█ ▄ ▀ ▄ ▄ █▄█ ▄▀▄█████ ████ █ █ █ ▀▄██▄▄▀█▄▀▄██▄▀ ▄ ▀██▀████ ████ █▄▄▄█ █ ██▀▄▄ ▀▄▄▀█▀ ▀█ ▄▀█ ▀██████ ████▄▄▄▄▄▄▄█▄███▄███▄█▄▄▄▄█▄▄█▄██▄█▄█████ █████████████████████████████████████████ █████████████████████████████████████████ # To add this OTP key to configuration, run the following commands: set vpn openconnect authentication local-users username tst otp key 'ebc1c91b13848ce0bb67d9212934546e41803cfa' Next it is necessary to configure 2FA for OpenConnect: .. code-block:: none set vpn openconnect authentication mode local password-otp set vpn openconnect authentication local-users username tst otp key 'ebc1c91b13848ce0bb67d9212934546e41803cfa' Now when connecting the user will first be asked for the password and then the OTP key. .. warning:: When using Time-based one-time password (TOTP) (OTP HOTP-time), be sure that the time on the server and the OTP token generator are synchronized by NTP To display the configured OTP user settings, use the command: .. code-block:: none show openconnect-server user otp