In completing this lab you have gained further practice using iptables. Each of your machines should now be protected by a custom firewall that we will continue to build on throughout the course. You have also gained experience troubleshooting iptables and determining what rules might need to be changed to allow desired traffic (or block undesired traffic).

Follow the instructions for lab 2b on blackboard.

===Andrew's sections===

::<span style="color:green;font-size:1.5em;">&#x2713;</span>Download and run https://ict.senecacollege.ca/~andrew.smith/ops335/labcheck2b.bash

::<span style="color:green;font-size:1.5em;">&#x2713;</span>Be able to explain how you debug a connectivity problem caused by iptables.

==EXPLORATION QUESTIONS==