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![Chapter 8] 8.10 Domain Name System (DNS)](http://web.deu.edu.tr/doc/oreily/networking/firewall/figs/fire0813.gif "Chapter 8] 8.10 Domain Name System (DNS)")
Chapter 8] 8.10 Domain Name System (DNS)
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DNS Tunneling: how DNS can be (ab)used by malicious actors
Is DNS TCP or UDP port 53? - Infoblox
