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== Find the MOST CURRENT list of Facebook Subnets ==To find the most current list of Facebook subnets, query a server to find subnets for their AS and make an alias from there. whois -h whois.radb.net -- '-i origin AS32934' | awk '/^route:/ {print $2;}' | sort | uniqOnce the list of netblocks is in hand, create an alias containing that data and then use it in Firewall rules to control direct access to Facebook.