The netfilter project enables packet filtering, network address [and port] translation (NA[P]T), packet logging, userspace packet queueing and other packet mangling. The netfilter hooks are a framework inside the Linux kernel that allows kernel modules to register callback functions at different locations of the Linux network stack. The registered callback function is then called back for every packet that traverses the respective hook within the Linux network stack. Linux network programming is a vast field that involves developing applications that use the network stack of the Linux operating system. One important aspect of Linux network programming is the Netfilter framework. Netfilter is a framework used for packet filtering, network address translation, and other packet mangling operations in the Linux kernel. Netfilter provides a set of hooks in the Linux kernel that allows developers to intercept and modify packets as they traverse the network stack. This provides a powerful mechanism for implementing firewalls, intrusion detection systems, and other network security applications. To use Netfilter, developers can write kernel modules that register callbacks with the Netfilter hooks. These callbacks are invoked for each packet that traverses the network stack, allowing the developer to inspect and modify the packet as needed. One popular tool for working with Netfilter is the iptables command-line tool, which allows administrators to configure the firewall rules using a simple syntax. iptables uses the Netfilter framework under the hood to implement the firewall rules. Overall, Linux network programming and the Netfilter framework provide powerful tools for developing network applications and implementing network security measures in the Linux operating system. The framework consists of four parts, including protocol-defined hooks and kernel modules that listen to these hooks, asynchronous packet queuing, and code/documentation The Netfilter framework, provided by the Linux kernel is a community-driven collaborative open-source project that provides packet filtering software for the Linux kernel series It enables packet filtering, network address translation, and other packet manipulation, commonly associated with iptables and its successor nftables. The framework offers various features such as stateless and stateful packet filtering, NAT/NAPT, and packet mangling. ----------------------------------------------------------------------------------------------------------------------------------------------- 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.