firewall and iptables

tags: learning networking linux diff-between

content

what’s firewall:

• it’s a network security system that routes incoming and outgoing traffics based on a set of configurable rules
• it’s a very broad term, it could be hardware, could be software

what’s firewalld:

• firewalld is a firewall management service, running as a daemon process on the system, hence the d
• firewalld is a service, higher level stuff, its backend uses iptables or nftables
• it has higher level concepts, like zones

what’s firewall-cmd:

• firewalld command line client
• it’s a tool to manage firewalld’s high level stuff, like firewall-cmd --list-all-zones to show all zones
• when firewall-cmd is called, it basically translates high level stuff to iptables’s or nftables’s commands

what’s iptables:

• it’s a CLI tool, it configures the rules used for routing incoming and outgoing traffic

up

iptables-basics

down

reference

• Firewall (computing)