The Java blocking feature protects your network against potentially harmful Java applets that may execute code and harm a host.

  • The Cisco Java blocking feature intercepts the Java applet.
  • It checks for a signature.
  • If the signature is valid, the applet is allowed to pass.
  • If the signature is invalid, the applet is dropped from the network.

A Java list can be an explicit allow or deny. Java blocking is not enabled by default; the service must be started.