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Q1: What is ebtables and why is it used to filter ARP traffic? A1: ebtables is a utility for filtering traffic passing through a Linux-based bridge. It operates at the Ethernet layer, making it perfectly suitable for handling ARP (Address Resolution Protocol) packets, which occur at the link layer. ebtables is commonly used to enforce MAC-layer filters, manage network segmentation, and mitigate various types of network abuses such as ARP spoofing. Q2: What are the typical commands used in ebtables for filtering ARP requests and replies? A2: The basic commands used in ebtables to filter ARP requests (ARP REQUEST) and replies (ARP REPLY) include: Adding a rule: ebtables -A
Specifying the chain: e.g.