https://archive.farsightsecurity.com/Passive_DNS_Sensor/
https://archive.farsightsecurity.com/Passive_DNS/passive_dns_hardening_handout.pdf
http://www.iseclab.org/papers/bilge-ndss11.pdf
https://kb.isc.org/article/AA-00535/119/Operating-an-ISC-Passive-DNS-sensor.html
http://www.rsreese.com/passive-dns-collection-and-analysis-using-yaf-and-mediator/
https://github.com/gamelinux/passivedns
http://www.youtube.com/watch?v=Tz7EYQPAMzA
http://www.youtube.com/watch?v=2Jpkm7EYbaM
https://kb.isc.org/article/AA-00535/119/Operating-an-ISC-Passive-DNS-sensor.html
http://rsf.isc.org/projects/sieisc/
http://conferences.npl.co.uk/satin/presentations/satin2011slides-Rasmussen.pdf
DNS firewall:
http://www.senki.org/using-dns-to-protect-your-network-and-your-customers/
http://www.slideshare.net/BarryRGreene/binds-new-security-feature-dnsrpz-the-quotdns-firewallquot
https://dl.farsightsecurity.com/dist/
https://kb.isc.org/article/AA-00525/
http://www.enyo.de/fw/software/dnslogger/#3
http://www.infoblox.com/sites/infobloxcom/files/resources/infoblox-datasheet-dns-firewall.pdf
http://www.infoblox.com/downloads/resources/defeating-advanced-persistent-threat-malware/download
