I need configure my programm firewall on OPC interface maсhine: it have two IP interfaces - first to PI server, second - to OPC server. I need block all connections unless connections needs to OPC interface. What rules need to be created for firewall?
allow:192.168.0.0/24 port TCP 135
allow: ip address of PI server port TCP 5450
Only this rules do not enough for working opc interface.Data is not transmitted.