This kantech ip device communication failed error occurs when the Access Control panels do not communicate with the Server Workstation. Which the Kantech software installation done.
The first test that we can make and to discard. That it is a communication error is to disable the Windows firewall. For this, we open control panel. We go to the following route: Control Panel\System and Security\Windows Defender Firewall and in the option “Turn Windows Defender Firewall On or Off ” we can disable it.

After disabling it we can check again, and we can verify that the Access control panels already have connection. With the server as shown in the following image.

The problem finally solved as we can see. But leaving the firewall disabled can lead to security problems in our PC to solve it. We must re-enable the firewall and create a new rule. Which will allow to open the necessary ports for communication between the server and the Access control Miami.
You create the rule in Advanced Settings >> Inbound Rules >> New Rule.

Windows operating systems contain the Windows Defender Firewall. Is a built-in security feature that filters incoming and outgoing network traffic to prevent unauthorized access and threats like hackers and malicious software (malware).
Monitoring and Controlling Network Traffic
The primary function of the firewall is to monitor and control the traffic flowing into and out of your computer over the network. It uses a set of rules to decide which data can come into your device and which can leave. If an app or a service tries to send data that doesn’t match these rules, the firewall can block it.
Protection Against External Threats
It helps protect your computer from hackers and other unauthorized entities trying to gain access via your network. For example, when the connection of your computer is in to a public or unsecured network (like a coffee shop’s Wi-Fi), the firewall helps block harmful inbound traffic that could potentially exploit weaknesses in your system.
We create the rule with the following configuration of the kantech ip device communication failed and test again the connection between the Access control panels and the server and the error should be solved.
The enable ports range are 18000, 18101-18109, 18112, 18802, 18200, 8801-8802, all by TCP protocol as shown in the next configuration.




