Microsoft Windows [Version 6.0.6001] (C) Copyright 2006 Microsoft Corp. c:\windows>netsh ras diagnostics set securityeventlog ?
set securityeventlog [ state = ] ENABLED|DISABLED
Enables or disables Security Event logging. You can view Security Event logs using Event Viewer.
state - tracing state of security events
ENABLED - Enables logging of Security Events for all network connections.
DISABLED - Disables logging of Security Events for all network connections.
NETSH / RAS / DIAGNOSTICS / SET / SECURITYEVENTLOG