5.3. Rule ReloadsΒΆ

Suricata can be told to reloads it’s rules without restarting.

This works by sending Suricata a signal or by using the unix socket. When Suricata is told to reload the rules these are the basic steps it takes:

  • Load new config
  • Load new rules
  • Construct new detection engine
  • Swap old and new detection engines
  • Make sure all threads are updated
  • Free old detection engine

Suricata will continue to process packets normally during this process. Keep in mind though, that the system should have enough memory for both detection engines.


kill -USR2 $(pidof suricata)

Unix socket:

suricatasc -c reload-rules