iptables Processing Flowchart (Updated Often) - Phil Hagen's …
Sep 25, 2014 · 2019-04-30: Added the three chains on the SELinux “security” table; added additional routing decision points for locally-generated packets; added reference to a great …
Routing Decisions in the Linux Kernel - Part 1: Lookup and packet flow
Jul 4, 2022 · Figure 1 represents a simplified block diagram of the packet flow through the kernel and shows the two most relevant places where the routing lookup is performed. Other items …
Linux NetFilter, IP Tables and Conntrack Diagrams · GitHub
Jul 17, 2015 · PREROUTING chain – Alters packets before routing. i.e Packet translation happens immediately after the packet comes to the system (and before routing). This helps to …
How to Manage Linux System Routing Rules With Iptables
Dec 5, 2022 · Iptables is a user-space utility program for managing firewall rules on a Linux kernel. It is a powerful security tool that keeps your system safe by blocking undesired network …
How to manage Linux network routes | LabEx
Learn essential Linux network routing techniques, configure network routes, manage routing policies, and optimize network connectivity with comprehensive network management strategies.
Constructing a complete control flow graph for Linux kernel
Jun 27, 2021 · Machinery to construct a control flow graph of individual C source files, that work for real dialects of C as used by the Linux kernel.
networking:kernel_flow [Wiki] - Linux Foundation
The routing decision results in a destination (dst_entry) object. This destination models the receiving IP address of the datagram. The dst_entry's output virtual method is called to …
Linux Routing Fundamentals – SDN Clinic
Jan 1, 2025 · This article is the first part of the Linux Routing series and will provide an overview of the basics and plumbings of Linux routing tables, what happens when an IP packet is sent …
firewall - How iptables tables and chains are traversed - Unix & Linux …
Mar 13, 2015 · PREROUTING / POSTROUTING has different uses for each of the table types (for example for the nat tables, PREROUTING is for inbound (routed/forwarded) SNAT traffic and …
Understanding Routing in Linux: Configuring Routes and Gateways
Oct 19, 2024 · In Linux, routing refers to the process of directing network traffic between different subnets or across different networks using gateways. In this article, I’ll explain what routing is, …