Unable to Connect to HiveMQ from Windows 10 LTSC Client

A client application running on Windows 10 LTSC fails to connect to HiveMQ, despite the socket connection being successfully established. No connection attempt appears in the HiveMQ server logs.

• Client OS: Windows 10 LTSC

• MQTT Client: Using WithAllowInvalidBrokerCertificates(true) setting

• HiveMQ: Any version

• Connection: TLS with self-signed or internal CA certificate

To resolve the issue:

1. Add the broker's certificate to the Windows Trusted Root Certificate Store:

   • Have your IT administrator import the self-signed or internal CA certificate into the Local Machine > Trusted Root Certification Authorities store.

   • This ensures that Windows recognizes the broker certificate as trusted.

2. Verify the connection:

   • After importing the certificate, the client should be able to connect successfully.

   • The connection works regardless of whether WithAllowInvalidBrokerCertificates(true) or false is used.