Firewall

BPFILTER: the next-generation Linux firewall

BPFILTER is one of the newer features to provide traffic filtering. Learn how it works and why it may replace iptables as the firewall on Linux systems.

Beginners guide to traffic filtering with nftables

The replacement of iptables is known as nftables. In this article, we learn to install nftables and configure it, to secure your Linux systems.

Differences between iptables and nftables explained

An overview of the differences between firewall technologies iptables and nftables. We highlight the major differences like simplicity and management.

Block IP addresses in Linux with iptables

Use iptables and ipset to create a blocklist and block one or more IP addresses on Linux. This guide will explain how to use and configure blocklists.

Exporting nftables rules and configuration

Nftables has an export subcommand available to make it easier to export firewall rules via the nft command line utility. Let's discover the options.