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How Do I Configure my Windows Firewall to Allow OPC Server Communication?

Primary Software: Other NI Software>>DataSocket
Primary Software Version: N/A
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
I am using OPC via DCOM with Microsoft Windows XP Service Pack 2.  How do I connect to an OPC server using DataSocket without disabling my firewall?

Solution:
In order to successfully communicate to the OPC server, you need to allow the proper exceptions in the Windows Firewall.  Open up the Windows Firewall from the Control Panel, and select the Exceptions tab.  Click on Add Program... and add the following:  

1. All OPC Clients and Servers
2. Microsoft Management Console
3. OPC utility OPCEnum.exe found in the Windows\System32 directory

Next, In the Exceptions tab of the Windows Firewall, click on Add Port...

In the Add a Port dialog, fill out the fields as follows:

Related Links:
[External Link] OPC Foundation: Using OPC via DCOM with Windows XP Service Pack 2 
KnowledgeBase 320BS5OP: How Do I Connect to an OPC Server Using DataSocket?
KnowledgeBase 1L272B6Y: Connecting to Remote OPC Servers Using DCOM
KnowledgeBase 3HUD6PUW: Configuring LabVIEW, LabVIEW DSC and Lookout to Work With the Windows Firewall 

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Report Date: 05/09/2008
Last Updated: 10/30/2008
Document ID: 4L8FNBHL

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