Guys just because a link does not open and appears down does not mean it actually is. It's easy to just think links have been taken down because Dofan etc are good at, and quick to get them taken down!
I've learnt this the hard way.
Some browsers (Chrome, Firefox etc) have "black lists" etc that block certain sites so when you try to open them they look down.
As suggested guys if in doubt try using private web browsing via a proxy server, VPN (virtual private network) etc which act as a firewall and web filter. If you look there are free VPN's and proxy servers available, depending where you are on this big blue ball! This is also great for those sites with lots of "pop" up's that are potiental virus carriers , trojans etc!
All the best.