Browser not connecting after returning from sleep, but email and imessage working fine

My Browsers are not able to access the Internet after returning from sleep. This effects other browsers (Firefox & Chrome) as well. The connectivity from mail and iMessage is working fine. I am also hardwired and not using WiFi.

I have the same problem since updating to Yosemite, works fine after restarting but once it goes in to sleep it affects email as well as browsers, I have a broadband connection. Also accessing the app store is hit and miss, it's either working or simply not not working.
It also affects other devices trying to connect to the internet over wifi via the airport time capsule, the problems started after installing Yosemite.

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