This repository contains a guide and templates for using iptables, here you will find an introduction to iptables, a powerful tool for configuring and managing firewall rules on Linux systems.

All modern operating systems come equipped with a firewall – a software application that regulates network traffic to a computer. Firewalls create a barrier between a trusted network (like an office ...

nftables provides a simpler, more efficient alternative to iptables, with unified IPv4/IPv6 handling. Features like rule tracing and multi-action rules in nftables enhance network management.

When deciding on a firewall implementation, most Unix-savvy administrators have usually chosen to use ipfilter on OpenBSD for their combination of capabilities and stability, as the capabilities of ...

Linux comes with a powerful firewall built-in, although the interface can be a little intimidating. This is the first in a multi-part tutorial on how to master basic and not-so-basic IPTables ...

Let's talk about protecting your network from what people can fetch. I'm going to take a twisty road to get there, so please stick with me. I wrote a lengthy report ...

Topic ===== security hole in iptables (2.4.x kernels) Problem Description ===== A vulnerability in iptables "RELATED" connection tracking has been discovered. When using iptables to allow FTP "RELATED ...