How to configure a linux firewall | Into the Terminal 131

Video Description

Firewalls, Somebody else's problem right? That’s what the network team is for isn't it? Or those infosec folks. That firewall just gets in my way, let someone else worry about it. Wrong! A host-based firewall on your linux system is an important part of a proper defense-in-depth approach to systems security. Most linux distributions include a host based firewall, Red Hat Enterprise Linux used FirewallD to manage the nftables firewall that it ships with. In this episode we’ll be showing you some basics, and maybe a few not so basics, on how to configure and use the firewall in RHEL. - - - - - Critical Administration Skills for Red Hat Enterprise Linux: Whether you are new to Linux or new to RHEL, join our hosts for a hands-on look into the commands and processes, ask questions, and grow your knowledge. Get Started with Red Hat Enterprise Linux: https://developers.redhat.com/register Try it for yourself: https://redhat.com/interactive-labs Join our Discord: https://red.ht/rhel-discord Nate Lager: https://social.undrground.org/@gangrif Scott McBrien: https://www.linkedin.com/in/scott-mcbrien-349b356 00:00 Host-Based Firewalls 01:20 Critical Path: Adding Services to Firewall 03:30 Firewall Service Definitions and Port Groups 06:15 Understanding Zones and Defense in Depth 08:45 Components of Firewalling Technologies 10:25 Exploring Firewall Service Definitions 13:10 Creating Custom Service Definitions 16:45 Opening Specific Ports Without Service Definitions 19:30 Understanding and Implementing Firewall Zones 24:15 Adding Source IPs to Specific Zones 27:10 Blocking Bad Actors with Block and Drop Zones 30:35 Using Rich Rules for Complex Firewall Configurations 34:40 Port-Specific Blocking with Rich Rules 38:15 Understanding Default Targets and Zones 40:30 Migrating from IPtables to NFtables