A couple of weeks ago I posted for help on a continual error I was getting when trying to update the libraries.
This was Error downloading http://downloads.arduino.cc/libraries/library_index.json
After installing wireshark on my ubuntu machine I have found out why the Arduino cannot connect to the site.
When I start Arduino and Manage libraries and Wireshark, I am seeing a few RED lines, or highlighted text for entries from my ubuntu machine's IP address to 224.0.0.252 which is unreachable.
To give more info,
the destination is 224.0.0.252 ,
Protocol LLMNR
Port 5355,
lenght 64
Standard query 0xf291 A wpad
So that is the problem; the Arduino IDE is attempting to connect to an unreachable web IP address.
Any ideas on how to fix that error