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DNS for Cybersecurity
What is DNS
Maps the name to the IP address: cnn.com – 151.101.1.67
Threats to DNS
DNS tracking
DNA poisoning
Malicious websites/malware
Employees…
HOSTS file
Local DNS configuration
DNS in the router/modem
ISPs and DNS collect data
ISPs collect your traffic and sell it to advertisers
ISPs can redirect faulty URLs
Public DNS
Google
8.8.8.8
8.8.4.4
Cloudflare
1.1.1.1
Websites that link to other websites
When you visit a website, many other websites are embedded in the page and your information can be collected.
https://developers.google.com/speed/pagespeed/insights/
Fingerprints
https://privacy.net/analyzer/#accordion
https://www.whatsmybrowser.org/
PiHole
DNS cache
Unbound recursive DNS
Communicates with authoritative DNS servers
OpenDNS
https://signup.opendns.com/homefree/
DNSSEC
It's a mess
DNS security issues
May cause unexpected problems
Do you know EVERY domain name your customers use?
Talk to your users
Can users change DNS settings?

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