Level 1 - Server Level 1 - Workstation
iptables allows configuration of the IPv4 tables in the linux kernel and the rules stored within them. Most firewall configuration utilities operate as a front end to iptables.
iptables is required for firewall management and configuration.
Run the following command and verify iptables is installed:
# dpkg -s iptables
Run the following command to install iptables:
# apt-get install iptables