u/SirPalinDrome_Real

I am working in a manufacturing plant and this weekend while they were not in production, I installed a SharkTap between the PLC and a managed switch. I tested the WireShark and was able to see communication to and from the PLC.

Now that they are in production, every capture I take is only seeing the communication From the PLC. I know that the PLC is receiving packet because stuff is working.

I have tried 2 different computers to run the WireShark. Both computer with Windows 11. The SharkTap is connected to a Gigabit Wired Tap Port. I have also replaced the Tap Port Network Cable.

Does anyone have any suggestions or thoughts?