block facebook on network home router

use a sniffer likehttp://www.nirsoft.net/utils/dns_query_sniffer.html This exactly shows in real-time what domains are being queried. But to make your life easier, these are the domains being queried when using the Facebook Messenger for Windows: www.facebook.com orcart.facebook.com fbstatic-a.akamaihd.net api.facebook.com orcart.facebook.com fbexternal-a.akamaihd.net fbcdn-profile-a.akamaihd.net graph.facebook.com fbcdn-dragon-a.akamaihd.net to block chat http://www.facebook.com/ajax/presence *facebook.com/ajax/chat**facebook.com/images/chat**facebook.com/ajax/presence**.channel*.facebook.com/x/*/false/p_* will update this post with the blocking ways