My WiFi works fine at work - to an apple router or to a linksys router which then connects up to the company router. Authentication to WPA2-Enterprise AD works fine. Everything is as it should be. When I take it home in the evening, it will not connect to my home networks. I have removed all WiFi networks from the settings and let it rediscover it, I have reset my apple airport extreme (latest) router, I have reset my Airport Express router (latest) etc. Removed double NAT issues etc. by making one router work in bridged mode for IP address allocation. No dice. It simply does not want to work. DNS seems to work - names get resolved. But it would not connect to that address. VPN connection to my workplace network works fine. All hosts on the other side of the tunnel work fine. But not any outside sites (since they are routed through the default network). I can do anything to the routers at home. Just tell me what to change. Oh, and all my mavericks and yosemite machines and all iOS devices, HTC M7, Blackberry all work fine with the existing configuration. What has broken in ElC ? Or what do I need to different in ElC ? Or What do I set up in the router config that needs to be different for ElC ? Thanks.