The major goal of Windows XP Service Pack 2 is to reduce common available scenarios for malicious attack on Windows XP. The Service Pack will reduce the effect of most common attacks in four ways:
1. Improvement in shielding Windows XP from the network
a. RPC and DCOM communication enhancements
b. Enhancements to the internal Windows firewall
2. Enhanced memory protection
3. Safer handling of e-mail
4. Internet Explorer security enhancements.
Most OPC Clients and Servers use DCOM to communicate over a network and thus will be impacted due to the changes in Service Pack 2. When Service Pack 2 is installed with its default configuration settings, OPC communication via DCOM will cease to work. This paper describes the settings necessary to restore OPC communication when using XP Service Pack 2 (SP2).
Continue Reading White Paper 'Using OPC via DCOM with Microsoft Windows XP Service Pack 2' by OPCFOundation
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