From the course: Protecting Your Network with Open Source Software
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ARP poisoning example
From the course: Protecting Your Network with Open Source Software
ARP poisoning example
- [Narrator] Packet analysis has many other useful applications in network security besides troubleshooting. One such application is network security reconnaissance. Packet analysis helps you detect ping sweeps or port-scanning attempts. It also allows you to detect information leakage or attacks such as Address Resolution Protocol or ARP poisoning. ARP is a protocol used to exchange information on mappings between IP addresses and ethernet addresses. Why is ARP necessary? Because we have a two-tiered addressing system in computer networking. One for Local Area Networks or LANs and the other for the internet. Have you heard of the term ethernet address. In a local area network or LAN, we use an address type called ethernet address. When we send the message outside of the LAN, we use a different type of address called IP address. Whenever a message arrives at a LAN, that message must be using the ethernet address again,…
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