Homematic binding ccu3: 'homematic:bridge: ... java.net.SocketTimeoutException: Connect Timeout

Dear Community,

I am using openHAB-2.4.x and a homatic ccu-3. I got difficulties to connect openHAB to thte ccu-3. The ccu runs and I can access the corresponding web-ui. My stacktrace is:

2019-01-28 11:20:42.405 [hingStatusInfoChangedEvent] - ‘homematic:bridge:063af176’ changed from OFFLINE (COMMUNICATION_ERROR): java.net.SocketTimeoutException: Connect Timeout to OFFLINE (COMMUNICATION_ERROR): Total timeout 15000 ms elapsed

My openHAB-Binding got the default parameters and I disabled the ‘need to authenticate’ option on the ccu-3 settings.

Best regards,
Jochen