Hi,

From few days I am trying to block mfacebook in my office through dns. Its unable to block mfacebook. I am unable to trace ip address of it. So please help me out from this problem. IN ADVANCE THANK YOU

Time to deploy a proxy or web filter.

mfacebook is the mobile application of Facebook so if you see that coming through, that is Facebook being accessed from mobile devices. Not sure if this helps or not.