### To disable a controller's Local Access To limit access to your system, you can disable the ExecB controller's Local Access port or the OptiFlex™ controller's Rnet port from communicating with the WebCTRL® application, Field Assistant, or Test and Balance running on a laptop. Select the controller on the WebCTRL® Network tree. On the Properties page, select Disable Local Access to Server and Tools. Click Accept. NOTES Use Global Modify to change this setting for multiple controllers simultaneously. The following can communicate with a disabled port: Touchscreen device PuTTY (<ExecB> only) Virtual BACview® application (<ExecB> only) HyperTerminal (<ExecB> only) SiteBuilder—for IP devices (<ExecB> only)