Can't resolve hostnames all of a sudden

[kawana]

For the past month, ive been able to play on many different servers. Last night, all of a sudden, any server I try to join, says "cant resolve hostname". What the heck is going on?

edit: Ive also tried deleting and reinstalling the FTB launcher, didn't work.

 

[Ashzification]

Can you post a console log please?

 

[Lawbroken]

In this time frame did your antivirus update or even your firewall/router settings change?