Sensei Free Edition is **forever free-of-charge**. We strongly recommend you register to keep in touch with updates and new features. You can register at `https://www.sunnyvalley.io/sensei <https://www.sunnyvalley.io/sensei>`_
Sensei may be installed using the web interface in OPNsense or using the command line interface via SSH or local system access (see :doc:`sensei_cmd_install`). The preferred method is the web interface because the process of installing plugins in OPNsense is simple and Sensei requires the use of the web interface to complete the initial configuration after installation.
To install plugins in OPNsense, you must use an account with administrative access.
..Note::
Before installing Sensei, you should ensure you meet the minimum system requirements in order to run Sensei or to have the best user experience. See :doc:`sensei_hardwarerequirements` for more information.
To install Sensei, you must first install the Sunny Valley Networks vendor repository plugin. Go to the :menuselection:`System --> Firmware --> Plugins` page. Click on the “+” icon next to os-sunnyvalley to install the plugin.
Once the vendor plugin is installed, you should see the Sensei plugin available in the list of plugins as os-sensei. If you do not see the Sensei plugin, you may need to refresh the “Plugins” page. Click the “+” icon next to os-sensei to install the plugin.
After installing Sensei, you should see the Sensei menu in the left sidebar of the OPNsense web interface. If you do not see the new, top-level menu, you may need to refresh the page.
Your hardware will be analyzed to ensure it meets the minimum requirements. You will receive one of following responses: compatible hardware, low-end hardware, incompatible hardware. The setup will not continue if you have incompatible hardware.
If you wish to use a remote ElasticSearch database, you must choose it now since you cannot change this after the initial configuration wizard has been completed.
* If you select “Use a Remote Elasticsearch Database”, you will be prompted to enter the URL, username, and password.
..Note::
If you have SOHO or higher Sensei paid subscription, we recommend that you install your license key before proceeding with the initial configuration wizard since this will activate a feature that will enable you to have central reporting for many firewalls from a single Elasticsearch instance. Otherwise, only a single remote ES instance can be used with a single firewall.
* Click the :menuselection:`Install Database & Proceed` button to install the local database if one is chosen and continue to the :menuselection:`Interface Selection` section.
* Select the Ethernet Interface(s) to protect. To do so, click on an interface and use the right/left arrow buttons to move it to protected/unprotected interfaces combo box.
The Cloud Threat Intelligence data is queried in real-time when any connections are made through your network. This capability enables Sensei to respond to malware and wireless outbreaks in real-time and very quickly.
The engine processes the request, queries the **“Sunny Valley Network (SVN) Cloud”** in real-time, and decides whether it will be blocked or allowed. Sensei checks against 140+ million websites under 120+ categories in milliseconds.
* Set your TCP Service password. This password protects the command line access to the packet engine. It is highly recommended to use a very secure password. The default password is “Sensei1234” so be sure to change it.
***Check for Updates Automatically:** Checks automatically for the updates and creates a notification on the Sensei “Status” page.
***Automatically Update Databases and Threat Intelligence Data:** Checks automatically for the updates and creates a notification on the Sensei “Status” page.
***Enable Generation of Support Data:** If enabled, Sensei collects supporting data during unusual events and crashes. You can share this data when opening a ticket with us.
***Max Swap Utilization:** You may specify how much swap space Sensei may utilize when the system is low on memory. It is recommended that you do not set this value too high. Otherwise, system performance may suffer.
***Health Check:** If enabled, "Health Check" monitors the system's memory, CPU, disk usage and core services if they're working correctly, and raises alerts if anything goes wrong. "Health Check" also stops the appropriate services if they're consuming excessive system resources.
***Help Sunny Valley Improve Its Products and Services:** If enabled, general system information is submitted to Sunny Valley to help improve the future development of Sensei.
