1 Windows 2003 SP1 configuration DCOM & Control List Genetec Information Systems Page i Win2003 Service Pack 1
2 Table of Contents 1 INTRODUCTION NETWORK CHANGES IN WINDOWS 2003 SERVER SP DCOM Security WINDOWS FIREWALL EFFECT OF WINDOWS 2003 SERVICE PACK 1 ON OMNICAST REQUIRED MODIFICATION ACCESS CONTROL LIST COM SECURITY...6 APPENDIX A - TECHNICAL SUPPORT...10 List of tables Table 1 - Default Restrictions Settings... 1 List of Figures Figure 1 - Windows Firewall General Tab... 2 Figure 2 - Firewall Security Alert... 2 Figure 3 - Windows Security Center... 3 Figure 4 - firewall... 3 Figure 5 - DCOM function call failed... 4 Figure 6 - Local Security Settings... 5 Figure 7 - Two new DCOM policies... 6 Figure 8 - DCOM: Machine Access Restrictions... 6 Figure 9 - DCOM: Machine Launch Restrictions... 7 Figure 10 - Component Services... 7 Figure 11 - COM Security... 8 Figure 12 - COM Security Access Permission... 8 Figure 13 - COM Security Launch Permission... 9 Genetec Information Systems ii Win2003 Service Pack 1
3 1 Introduction The purpose of this document is to demonstrate the new network protection changes to be included in Windows server 2003 Service Pack 1 and as a result of these changes, the modifications made to the Omnicast software. 1.1 Network Changes in Windows 2003 server Service Pack 1 The network changes will directly affect Omnicast s functionality. The three main changes are the DCOM Security, RPC Interface Restriction and the Windows Firewall DCOM Security COM (Component Object Model) will now provide computer wide access controls that will oversee access to all call, activation, or launch requests on the computer. There will be an Access Control List for launch permissions to cover activate and launch rights, and an Access Control List for access permissions to cover all call rights. The Access Control List can be configured through the Component Services Microsoft Management Console. The following table provides the default restriction settings for Windows 2003 server SP1: Permission Administrator Everyone (Users on the same Domain) Launch Local (Launch) Local (Launch) Local Activate Local Activate Remote (Launch) Remote Activate Access Local (Call) Remote (Call) Table 1 - Default Restrictions Settings Anonymous (All users) Local (Call) The default restrictions settings for COM server can be modified. However, the application-specific launch permission Access Control List needs to give the appropriate users activation rights so application and Windows components that use DCOM do not fail Windows Firewall Windows 2003 server Firewall in Service Pack 1 is turned off by default. Figure 1 - Windows Firewall General Tab Genetec Information Systems 3 Win2003 Service Pack 1
4 If you run a program such as Omnicast that needs to receive information from the internet or a network, a window comes up asking if you want to block or unblock the connection. Figure 2 - Firewall Security Alert 2 Effect of Windows 2003 server Service Pack 1 on Omnicast The new default DCOM Security implemented in Win2003 Service Pack 1 cannot be changed. Hence, Genetec had to modify its Omnicast software accordingly. We decided to add an additional user account to the Windows operating system. The new user, OmnicastRPCUser will be added automatically through our server install shield on the Directory server. This will enable Omnicast to connect remotely through DCOM. Note: Do not modify the OmnicastRPCUser. If you do, you will not be able to login into Omnicast through the Local Area Network, since the new DCOM security will prevent all DCOM function calls. Figure 5 - DCOM function call failed The new DCOM security only blocks the connection to the LAN. However, the connection through IVS (internet) works fine as long as the Windows Firewall is disabled because it s a TCP connection. 3 Required Modification If you keep the default setting of the firewall (disabled by default), Only Acccess Control List modifications is required and should be preformed on all Clients and Servers (including the Main Directory). The last modification, COM Security should only be applied on the machine that hosts the Directory. Genetec Information Systems 4 Win2003 Service Pack 1
5 3.1 Access Control List The Access Control List has to be modified so that all Servers and Clients can connect to the Main Directory (DCOM server). To modify the ACL do the following: 1. Click on Start and then on Control Panel 2. Open up the Administrative Tools 3. Open the Local Security Policy 4. Under the Security Settings, open the Local Policies and select Security Options (as shown below). Figure 6 - Local Security Settings 5. There are two new policies that were added to the Security Options; DCOM: Machine Access Restriction and DCOM: Machine Launch Restrictions. These are the two policies that need to be modified in order for DCOM to work. The default settings for these policies are shown in Table 1. Genetec Information Systems 5 Win2003 Service Pack 1
6 Figure 7 - Two new DCOM policies 6. Right click on DCOM: Machine Access Restriction and select Properties. The following window will appear: Figure 8 - DCOM: Machine Access Restrictions 7. Click on Edit Security 8. Make sure the ANONYMOUS & Everyone groups have both Local and Remote Access checked. 9. Click OK (twice). Genetec Information Systems 6 Win2003 Service Pack 1
7 10. Right Click on the DCOM: Machine Launch Restrictions and select properties. Figure 9 - DCOM: Machine Launch Restrictions 11. Click on Edit Security. 12. Make sure the Administrator (on the Network Domain) and the Everyone group have Local Launch, Remote Launch, Local Activation and Remote Activation permissions checked. 13. Click OK (twice) 14. In order for the Access Control List modifications to take affect, reboot the PC. 3.2 COM Security This last modification should be done only on the Main Directory Server, which represents the DCOM server where other Clients and Servers connect to. 1. Click on Start and then on Control Panel 2. Open up the Administrative Tools 3. Open the Component Services 4. Under the Component Services, open Computer. You should be able to see My Computer. Figure 10 - Component Services Genetec Information Systems 7 Win2003 Service Pack 1
8 5. Right click on My Computer and select Properties. 6. Go to the COM Security tab. Figure 11 - COM Security 7. Click on Edit Default under Access Permissions. Figure 12- COM Security Access Permission Genetec Information Systems 8 Win2003 Service Pack 1
9 8. Add the Administrators group from the local machine and give it Local and Remote access. 9. Click OK 10. Click on Edit Default under the Launch and Activation Permissions. Figure 13 - COM Security Launch Permission 11. Add the Administrators group from the local machine and give it Local Launch, Remote Launch, Local Activation and Remote Activation permissions. 12. Click OK. 13. Click Apply in the My Computer Properties window and then OK. 14. Reboot the PC. Genetec Information Systems 9 Win2003 Service Pack 1
10 Appendix A - Technical Support In Canada or the U.S.A., customers can reach Genetec s Technical Assistance Center (GTAC) using any one of the following methods: 1. Go to Genetec s World Wide Web technical support site: 2. Send questions, via , to: 3. Telephone questions to the GTAC at: , option 2 4. FAX questions to the GTAC at: No matter which method is used to reach the GTAC, customers should be ready to provide all relevant information describing the problem or question. Please always have your System ID handy. Genetec Information Systems 10 Win2003 Service Pack 1
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