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IPTables

1. Netfilter

1.1. Netfilter Overview

  • Netfilter is a framework within the Linux kernel.
  • It provides various networking-related operations.
  • Netfilter’s primary role involves packet filtering, network address translation, and packet mangling.

1.2. Key Features of Netfilter

  • Allows for the manipulation of packets as they traverse through the Linux network stack.
  • Utilized by administrators to manage and control network traffic.
  • Versatile in terms of protocols and network layers.

1.3. Connection to IPTables

  • IPTables is a user-space utility program.
  • Utilizes the Netfilter framework to implement firewall configurations.
  • Provides a command-line interface to configure rules governing packet filtering and NAT.

1.4. Additional Functionalities

  • Implements different network address translation techniques, such as SNAT and DNAT.
  • Supports stateful packet inspection, allowing tracking of connection states.

2. Relevant nodes

Tags::network:linux:cs: