... and Object Access should be used sparingly to prevent excessive entries in the security log. 14 14 Secure System Administration - SANS GIAC © 2000, 2001The Event Viewer is a Graphical User ... IUSER_<computername>. Also, the null session vulnerability is not “fixed” simply by installing Service Pack 4 (though SP4 did provide some important security enhancements to Windows NT). The null session vulnerability ... closed out this section of the course with null sessions and a fast tour of the Resource Kit. 24 24 Secure System Administration - SANS GIAC © 2000, 2001Review of Tools• RDISK /S• VOL• CONVERT•...