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Updated HOWTO blocking WhatsApp (markdown)
Fix broken anchor link
I do not maintain this thread anymore use Threema/XMPP/Hoccer if you're old enough and prefer security over gimmicks
added SIP 2.0+ (RFC3261) - I never saw 5064 but just in case put 5060-5064 in your router/firewall, most of them already doing this anyway (via STUN and UPnP) ...
last links added, prepare to finalize the article "somehow" .. (low-prio), added proxy notice
added important information
replaced German article with an English one, small fixes, seperate Android/iOS and Web/Client
added article which shoes (again) how insecure WhatsApp seems (it's in german) it uses whireshark + wireshark-whatsapp plugin + YowSup to proof that the encryption is useless - this again proofs that using a "secure" protocol doesn't mean automatically it's secure or proper implemented ..
crash added, IPv6 note added, only GTalk/Yahoo and such supporting IPv6 atm
added wikis/faq's for proof, added more links including password extraction guide (yeahh WA is still insecure after all), ... ALL DNS records added
small fixes
Updated HOWTO blocking WhatsApp (asciidoc => markdown)