Objective #1 = To understand behavior of OPC Tunneller with respect to packet transfer and how they behave with Windows Firewall (or any firewall for that matter) turned ON.
Objective #2 = To appreciate how easy to do OPC DA tunnelling with OPC Expert software.
Objective #3 = To refresh myself with Wireshark network packet sniffing software.
1. The setup for today is via 2 VMs -- both equally the same. Clone of Windows 7.
2. Pls note that i chose network settings as Host-only Adapter in my Virtualbox bcoz i want all my VMs to be able to talk to each other. Image below taken from Nakivo.
3. Next i fired up 2 VMs -- VM03 and VM04 -- VM03 is loaded with OPC DA Server simulator. My favorite is Graybox OPC.
4. Based on guideline from OPC Expert website -- i was able to tunnel OPC data smoothly within 10 minutes -- i could not believe how simple it is -- compared to previous Tunnelling software i have used (Matrikon OPC Tunneller and Cogent Datahub)
5. Next step -- let's analyze what ports are being used by OPC Expert to obtain data from VM03. I launched Wireshark and start sniffing... so i found that if i want to use OPC Expert to tunnel OPC data -- i would need two (2) TCP ports to be opened.
a) TCP 57888 -- this is for source tunnel
b) TCP 49194 -- this is for destination tunnel
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