Recently when I have open www.facebook.com at that time I found that facebook INDIA is down you can see the bellow figure.
It may be due to highly DDOSE attack.Now how to solve this problem ??
Just download any VPN and use it will work 100% then you will able to open facebook.
I Recommends Open VPN or TOR VPN download it and register on that site and use free version of VPN it works perfectly !