Hello, I wanna tell you my story of fixing this problem.
I had the same problem in Battlefield 3 (on Battlefiled 4 it works too) and i didnt know what to do. Then i went in Minecraft and i had the same problem - i couldnt connect to any server. Then i remembered that, i had the same problem with Minecraft year ago - it was CLOSED PORTS! Sometimes your internet provider CLOSES ALL PORTS. Then i called my provider and TOLD HIM TO OPEN ALL PORTS. That took 7-10 mins. After this everything working like before (i changed my internet provider - thats why i got this problem). Maybe you have the same problem as me, maybe you already got the solution.
Try to open all ports like said but also visit http://answers.ea.com/t5/Battlefield-4/READ-FIRST-Common-issues-amp-Solutions/m-p/3218167#U3218167 and follow steps there, if that does not work tell me your PC Specs and DXDiag help for this can be found here, http://help.ea.com/en/article/how-to-gather-dxdiag-information/
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Thank-you
Killerwhal812
Please give me XP if I helped
Please mark this as a soloution if I resolved your issue.
