Very weird server connection problem, that I can't seem to work out

NOTE! I use TeliaSoneraAB as ISP.

I have a very wierd problem, that I could not find info on, on Google. I seem to have lost connection to a sort of mother server (NOTE! I don't have that much computer knowledge, though some)

I can't log in to this game i'm playing, Smite. I get the error message "Unable to connect to server". I can't find servers in Rust and DayZ standalone. On-line, I can watch YouTube videos, but I have some problems seeing usernames. I can't watch things on HBO though.

Anyone got a fix?
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Specs:
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 8124 Mb
Graphics Card: AMD Radeon HD 7800 Series, -2048 Mb
Hard Drives: C: Total - 953866 MB, Free - 395164 MB;
Motherboard: MSI, B75MA-P45 (MS-7798)
Antivirus: Norton 360, Updated and Enabled