Upon completion of this lab, your host machine has a firewall protecting it from unexpected traffic. You should now have a basic understanding of the commands necessary to modify firewalls using iptables. You will be building on these rules for the rest of the course.

Follow the instructions for lab 2a on blackboard.

===Andrew's sections===

::<span style="color:green;font-size:1.5em;">&#x2713;</span>Issue command: '''journalctl --dmesg | grep -i MYSSH''' to confirm that outside ssh connections logged.

::<span style="color:green;font-size:1.5em;">&#x2713;</span>You know how to read a diff file.

=EXPLORATION QUESTIONS=