Lab exercise:

$1.$ Install iptables on your Kail or Ubuntu system.

$2.$ Set the default policy to ACCEPT for all three chains including the INPUT, FORWARD, and OUTPUT

chanis. Sample command:

iptables $$P INPUT DROP

iptables $$P FORWARD DROP

iptables $$P INPUT DROP

$3.$ Add an input policy:

iptables $$A INPUT $$I lo $$j ACCEPT

$4.$ List the rules with rule names

iptables $$L $$line$-$number

$5.$ List the rules with rule numbers

iptables $$L $$line$-$number

$6.$ Install ufw firewall on the same Linux system

apt$-$get install ufw

$7.$ Check the ufw status

ufw status

Host$-$based firewall $($Linux$)$

$8.$ Enable ufw firewall on your system

ufw enable

$9.$ Show the information of ufw rules

ufw status verbose

$10.$ Deny all IPV$6$ rules by modify the configuration file

nano $/$etc$/$default$/$ufw