Unlock the mysteries of a DNS request/response with Betty DuBois! In this in-depth tutorial, you'll learn how to capture, analyze, and interpret DNS packets using real-world examples in CloudShark (think Wireshark in your browser). Follow along as Betty demonstrates step-by-step analysis, shares expert insights, and provides practical tips for mastering DNS packet analysis.
Whether you're a network engineer, IT professional, or just curious about how DNS works under the hood, this video covers:
• How DNS queries and responses work
• Understanding transaction IDs, flags, and recursion
• What happens when DNS packets are lost or truncated
• The role of UDP and TCP in DNS communication
• Load balancing, round robin DNS, and fault tolerance
• Analyzing CNAMEs, aliases, and error messages
• Practical troubleshooting tips and packet filtering
00:00 - Intro
00:18 - Pcap In CloudShark
01:08 - Query Fields
05:35 - How DNS Packets Get Truncated
08:40 - DNS Recursion Process
12:00 - Continue For DNS Query Fields
14:11 - DNS Response Fields
24:57 - DNS Errors
🔗 Normal DNS request/reply pcap, https://www.cloudshark.org/captures/16e7947fbd2f
🔗 DNS pcap that has errors, https://www.cloudshark.org/captures/29b9839475ab
✅ Check out my courses, https://https://learn.bettydubois.com/
👀 Watch my Pluralsight courses, https://www.pluralsight.com/authors/betty-dubois
👍 Like, comment, and subscribe for more pcap analysis!
