block orgs with pf, mention ipv6 hosts to fix #269
block orgs with pf, mention ipv6 hosts to fix #269
drduh/OS-X-Security-and-Privacy-Guide,drduh/OS-X-Yosemite-Security-and-Privacy-Guide,drduh/macOS-Security-and-Privacy-Guide,ScheerMT/OS-X-Yosemite-Security-and-Privacy-Guide