Features and benefits

Connection-rate filtering is a countermeasure tool you can use in your incident-management program to help detect and manage worm-type IT security threats received in inbound IP traffic. Major benefits of this tool include:
  • Behavior-based operation that does not require identifying details unique to the code exhibiting the worm-like operation.

  • Handles unknown worms.

  • Needs no signature updates.

  • Protects network infrastructure by slowing or stopping IP traffic from hosts exhibiting high connection-rate behavior.

  • Allows network and individual switches to continue to operate, even when under attack.

  • Provides Event Log and SNMP trap warnings when worm-like behavior is detected.

  • Gives IT staff more time to react before the threat escalates to a crisis.


When configured on a port, connection-rate filtering is triggered by IPv4 traffic received inbound with a relatively high rate of IP connection attempts.


As stated previously, connection-rate filtering is triggered by inbound IP traffic exhibiting a relatively high-incidence of IP connection attempts from a single source.

Example of protecting a network from agents using a high IP connection rate to propagate