OPC DA Server
I can connect to your OPC Server from an OPC Client on the local PC, but cannot connect to the OPC Server from a remote PC. Error indication is 'Access is Denied.'
Default DCOM settings vary from system to system. Generally, default DCOM settings on the server machine restrict OPC Client applications from accessing a remote OPC Server.
Windows Firewall can also present problems on Windows XP higher systems.
Refer to this technical note for Automated Solutions' recommended settings: (Requires PDF Reader)