DNS

When navigating to www.amazon.com, the client asks

• Hey, Root Server! Where is .com? Oh, OK, thanks.
• Hey .com Server! Where is amazon.com? Oh, OK, thanks.
• Hey, amazon.com Server! Where is www.amazon.com? Oh, OK, thanks.

Debugging DNS

• USC CS Colloquium
• DNS debugging are problematic because
  • no one-size-fit-all oracle (detector)
  • does not have a specification
• Domain name abuse (Bot, Phishing, Malware)
  • Can be "revoked" by the domain registrars by delisting & sinkholing
  • DNS software goes under code review
• Can Exploit DNS Cache to return false results
• Ghost Domain Attack
• Phoenix Domain Attack