Make DNS a Cornerstone of Your Cyber Security Arsenal

As well as the tips given in the article, you should also consider placing some deceptive entires in your DNS that get triggered by an attacker when conducting recon of your name space…:

[…] Better known for their essential role in networking, Domain Name Servers should be tapped as a means to identify – and shut down – suspicious or destructive activity, according to Anthony James, VP of Marketing for Infoblox. He also explains how to combine DNS with DHCP and IP address management to improve an organization’s security.

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Original article here