I would like to report the following finding with HUE bridge connection:
Problem:
Frequently the following error messages were shown in openhab.log file:
2016-12-01 09:06:05.182 [WARN ] [.h.internal.hardware.HueBridge] - Failed to connect to Hue bridge: HTTP request timed out.
2016-12-01 09:06:05.183 [WARN ] [inding.hue.internal.HueBinding] - Hue settings were null, maybe misconfigured bridge IP.
openHAB was then in most cases unreachable thru Putty or WinSCP.
Situation happened intermittent, may be 75% of the time no connection, 25% of the time there was a connection.
My Internet setup is as follows:
Telekom Speedport Hybrid router for internet DSL connection - WiFi disabled.
Fritzbox 3370 connected thru Ethernet cable with the Speedport router, WiFi enabled.
Hue Bridge connected to Fritzbox.
Solution:
After connecting the Bridge directly to the Speedport router the HTTP timeout problems completely disappeared.
Cheers Markus.