All sensors in Aanval are required to provide permissions to a user. Assigning a user or multiple users to a sensor allows those selected users to interact with that sensor. Searching, reporting, managing, charts, graphs, etc -- are all dependent upon user / sensor assignment.
A common usage of this feature is to limit access to sensors for specific users (clients, customers, etc).
To change permissions for a sensors, visit the sensors display pages for either Snort / Suricata or Syslog and select / multi-select the users you would like to have access to a sensor.