Lisa Bock covers cache poisoning, which inserts bogus information into a DNS server’s cache with the goal of diverting traffic to the attacker's computer.
- [Instructor] Networks rely on DNS…to provide accurate information…on host name to IP address resolution.…If I want to go to a web page,…I rely on DNS to give me the correct address,…or else I might be redirected to a bogus site.…The same is with email, if an email server address…is incorrect, I'll get a bounce back…with a message that the server cannot be found.…When configuring a DNS server,…correct configuration is essential,…as a mis-configuration can lead to devastating problems.…
DNS can be compromised by poisoning the cache.…Cache is a temporary holding area for data.…It's designed so that devices that request…a response can get a quicker response.…Websites use caching so we can get…a quicker response when requesting a web page.…On our own system we have a cache of DNS records.…Let's take a look.…I'm at the command line interface,…and once in the command line interface,…I'll type in ipconfig /displaydns.…There are a lot of records in my DNS cache, as you can see.…
What you can see is Record Name, Record Type,…
Author
Lisa Bock
Updated
1/13/2020Released
9/29/2016Note: The topics in this course will prepare you for key objectives on the Certified Ethical Hacker exam. Find an overview of the certification and the exam handbook at https://www.eccouncil.org/programs/certified-ethical-hacker-ceh/.
- Sniffing network traffic
- Passive vs. active attacks
- Comparing IPv4 to IPv6
- MAC and macof attacks
- Investigating DHCP attacks
- Detecting ARP and DNS spoofing
- Sniffing tools and techniques
Skill Level Beginner
Duration
Views
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Introduction
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Welcome1m 5s
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1. Sniffing Overview
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Sniffing network traffic4m 15s
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The OSI model4m 10s
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Passive and active attacks4m 34s
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Tapping into the data stream3m 19s
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Comparing IPv4 to IPv64m 35s
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2. MAC Attacks
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macof attack demo1m 51s
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Spoofing a MAC address2m 47s
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3. DHCP
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Investigating DHCP4m 20s
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Depleting the DHCP pool1m 25s
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4. ARP
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Address Resolution Protocol2m 48s
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Ettercap for ARP poison3m 8s
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Detecting ARP spoofing2m 51s
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5. DNS
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Domain Name Systems3m 28s
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Caching and forgery2m 12s
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Poisoning DNS1m 56s
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6. Sniffing Tools and Techniques
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Capturing images1m 19s
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Investigating OmniPeek3m 13s
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Other sniffing tools1m 9s
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Defending against sniffing1m 53s
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Conclusion
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Next steps2m
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Video: Caching and forgery