how to block https sites on netgear router?

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http://serverfault.com – I am using NETGEAR Wireless-N-300 Router Model among couple of peoples to sahre internet connectivity. I have a problem, on my company i blocked facebook.com, but the users are access on protocol https, i blocked some ip´s of facebook but they haves a lot ip, please, how to block facebook on https protocol...?? Can anybody help me for creating the block HTTPS traffic rule. Like I need to block: https://www.facebook.com/ many thanks Karthick (HowTos)