UCCNC does not see the UC300ETH controller

[NikolayUA24]

The problem was in the antivirus, it blocked traffic for the UCCNC.exe. Created a rule in antivirus, both directions protocol TCP and UDP.
The UCCNC connects to the controller. Thank you all for your help in finding the problem.

[gk285267]

Can you tell me exactly how you identified exactly what the problem was, especially since I am experiencing exactly the same problem? Thank you, and glad you got up and running.

[NikolayUA24]

Can you tell me exactly how you identified exactly what the problem was, especially since I am experiencing exactly the same problem? Thank you, and glad you got up and running.

I disabled the antivirus and tried to start UCCNC, it started working. Then I started looking for the reason, went into the advanced network security settings and there I saw in the rules that UCCNC prohibits incoming traffic. I created a rule and the problem disappeared. The next day, I thought about why I needed a CNC antivirus, and deleted it.
And turned off the Windows firewall.

[ger21]

Just set an exception for the UCCNC folder for whatever AV you are using.