.. _vpn-anyconnect:

AnyConnect
-----

Cisco AnyConnect-compatible server(based on great OpenConnect software) feature is available from this release.
Anyconnect 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 anyconnect client to connect to the router and will receive an IP address from a VPN pool, allowing full access to the network.

.. note:: All certificates should be stored on VyOS under /config/auth. If certificates are not stored in the /config directory they will not be migrated during a software update.


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 command will create a self signed certificates and will be stored in the file path /config/auth

.. code-block:: none

  openssl req -newkey rsa:4096 -new -nodes -x509 -days 3650 -keyout /config/auth/server.key -out /config/auth/server.crt
  openssl req -new -x509 -key /config/auth/server.key -out /config/auth/ca.crt

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 <domain name>

Server Configuration
-------------------------

.. code-block:: none

  set vpn anyconnect authentication local-users username <user> password <pass>
  set vpn anyconnect authentication mode <local|radius>
  set vpn anyconnect network-settings client-ip-settings subnet <subnet>
  set vpn anyconnect network-settings name-server <address>
  set vpn anyconnect network-settings name-server <address>
  set vpn anyconnect ssl ca-cert-file <file>
  set vpn anyconnect ssl cert-file <file>
  set vpn anyconnect ssl key-file <file>

Example
----

Use local user name "user4" with password "SecretPassword"
Client IP addresses will be provided from pool 100.64.0.0/24
The Gateway IP Address must be in one of the router´s interfaces.

.. code-block:: none

  set vpn anyconnect authentication local-users username user4 password 'SecretPassword'
  set vpn anyconnect authentication mode 'local'
  set vpn anyconnect network-settings client-ip-settings subnet '100.64.0.0/24'   
  set vpn anyconnect network-settings name-server '1.1.1.1'
  set vpn anyconnect network-settings name-server '8.8.8.8'
  set vpn anyconnect ssl ca-cert-file '/config/auth/fullchain.pem'
  set vpn anyconnect ssl cert-file '/config/auth/cert.pem'
  set vpn anyconnect ssl key-file '/config/auth/privkey.pem'

Verification
----

.. code-block:: none

  vyos@RTR1:~$ show anyconnect-server sessions 
  interface    username    ip            remote IP      RX        TX        state      uptime
  -----------  ----------  ------------  -------------  --------  --------  ---------  --------
  sslvpn0      user4       100.64.0.105  xx.xxx.49.253  127.3 KB  160.0 KB  connected  12m:28s