Netlink netfilter part2 A Package netfilter provides encoding and decoding of Netlink messages into Netfilter attributes. It handles Netfilter-specific nesting of attributes, endianness, and is written around a native Netlink implementation Netlink is a protocol used to communicate between the kernel and user space processes. In the context of Netfilter, Netlink is used to configure and manage Netfilter rules and policies from user space. Netlink Netfilter is a specific implementation of Netlink that allows user space applications to interact with the Netfilter framework by sending and receiving messages through the Netlink socket. This allows developers to write applications that can create, modify, and delete Netfilter rules and policies dynamically. Netlink Netfilter is a powerful tool for managing and monitoring network traffic in Linux-based systems. It provides a flexible and extensible interface for controlling packet filtering, NAT, and other packet manipulation features in the Linux kernel. However, it also requires specialized knowledge and skills to use effectively, as incorrect configuration or misuse can have serious security consequences. Netlink is a socket-based protocol used for communication between the Linux kernel and user-space processes. It is commonly used to configure and monitor network-related settings, such as iptables rules and routing tables. Netlink is also used by the Netfilter framework to provide a mechanism for kernel modules to communicate with user-space processes. Netlink-based communication within the Netfilter framework is achieved through the use of the nfnetlink_queue module, which allows packets to be queued for processing by user-space processes. This can be useful for applications that require deep packet inspection or more complex processing than is possible with the built-in Netfilter capabilities. However, it is important to be aware that using nfnetlink_queue can introduce additional latency and overhead into the packet processing pipeline, and may not be suitable for all use cases. Developers can add functionality to the Netfilter framework by writing Linux kernel modules that register themselves with the framework and specify which hooks they want to intercept. ----------------------------------------------------------------------------------------------------------------------------------------------- Linux kernel foundation course Full Stack Linux Kernel & Device Driver Programming Course Its a complete guided course of ~140+ hrs. combination of following modules. Life time LMS access Get full LMS access instantly after enrolling, 125+ hrs of recorded lectures – System programming, Linux Kernel Internals, Linux Device Drivers and Linux Debudding techniques. Real Time Projects Work with real time projects through out the course. Expert resources and useful tools to help make your project a success, from ideation to enterprise adoption. Interview preparation 1-on-1 on demand mock interview sessions will be taken by experts having experience of cracking SDE interviews of tie one company like Samsung, Qualcomm, Intel & Cisco etc. Contribute to open source Contributing to open source can be a rewarding way to learn, teach, and build experience in just about any skill you can imagine. --------------------------------------------------------------------------------------------------------------------------------------- Linux System Programming ~30 hrs. training This module will teach you the necessary theory and applications to properly understand the advanced algorithms and concepts of C and Linux system. Linux Kernel Internals ~30 hrs. training In this module we will cover Linux Kernel Internals. To have sufficient understanding of Linux Operating System or any other Operating System, for that matter, and what makes them functional at core. Linux Device Driver ~30 hrs. training This module teaches you how to develop device drivers in the Linux for projects on embedded platforms -raspberry pi 4, Beaglebone black, or on the traditional PC platform. through theory and practical Linux Socket Programming ~30 hrs. training In this module, you will learn Linux Socket Programming which provides quite a complete discussion presented in graphically manner with working programs from the very basic networking up to the packet level. Network Device Drivers ~30 hrs. training This module will teach you how to write Linux device driver for PCI device, GPIO (General Purpose IO), USB and pseudo Network device with PING (ICMP protocol) functionality. Contact : info@linuxkernelfoundation.com --------------------------------------------------------------------------------------------------------------------------------------- Like share subscribe our channel for more such content.