How Can I Disable Anonymous Access in Windows Server 2003?

Problem

I got lots of "Anonnymous Logon" security events as beow in the Windows Event Viewer. How can I disable anonymous access in Windows Server 2003?

	Event Type:	Success Audit
	Event Source:	Security
	Event Category:	Logon/Logoff 
	Event ID:	540
	Date:		3/20/2007
	Time:		8:33:09 AM
	User:		NT AUTHORITY\ANONYMOUS LOGON
	Computer:	NUCONOMY02
	Description:
	Successful Network Logon:
		User Name:	
		Domain:		
		Logon ID:		(0x0,0xBEFA999)
		Logon Type:	3
		Logon Process:	NtLmSsp 
		Authentication Package:	NTLM
		Workstation Name:	XXXXXXXX
		Logon GUID:	-
		Caller User Name:	-
		Caller Domain:	-
		Caller Logon ID:	-
		Caller Process ID: -
		Transited Services: -
		Source Network Address:	###.###.###.###
		Source Port:	0
	

Solution

1. Login as "Administrator" and click "Start > Run".
2. Type "regedit" in the box and click "Ok" button
3. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
4. Change the value of "RestrictAnonymous" from "0" to "1"
5. Exit regedit and reboot the server

Related Resources

• Microsoft TechNet Article: RestrictAnonymous
• Microsoft Knowledgebase Article (KB143474): Restricting information available to anonymous logon users

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