java.net.Connectexception: connection timed out: no further information

Hello,

The other day I wanted to play on a multiplayer server, but when I opened the server list, after 1 minute, all it said was: 'Can't connect to server'
On ALL of the public servers in my list.
And when I try to join one it says: java.net.Connectexception: connection timed out: no further information.
I have been trying to fix this for a long time.
(Changing DNS, editing firewall, reinstalling java/minecraft.)
But NOTHING helped!
I just want to play multiplayer and this is not really helping me.
I hope you can respond ASAP