![]() To turn off the Windows firewall, follow the steps below: ![]() You will turn the firewall back on once DCOM has been configured. ![]() Check with the network administrator to ensure it is safe to turn off the firewall temporarily. If the computer resides on a safe network, there is usually little potential for damage as long as the firewall is turned off for a short period of time. The firewall helps protect computers from unauthorised access (usually from viruses, worms and people with malicious or negligent intent). The first step to establish DCOM communication is to disable the Windows firewall, which is turned on by default in Windows XP Service Pack 2 and later. This will help integrators set up reliable and secure OPC connections. In addition, this article covers troubleshooting tips to identify common OPC and DCOM problems, their symptoms, causes, and how to solve them. Configure server-specific DCOM settings.If you have ever been unable to establish an OPC connection or transfer OPC data successfully, the underlying issue is likely DCOM-related.Ī simple and effective strategy to establish reliable DCOM communication involves the following steps: OPC technology relies on Microsoft’s COM and DCOM to exchange data between automation hardware and software however, it can be frustrating for new users to configure DCOM properly.
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