For the background and introduction to this series, click here. The TL;DR for Project Chain Links is to:
Present a clear problem to solve
Make sure the problem is small enough to tackle quickly
Provide a solution a few days later for validation
And with that, let's get on with it!
Challenge #2
The background: A coworker is trying to create some basic access controls for a web application and finds a codeshare entry on DevCentral that looks like it will fit the need.
The problem: The codeshare entry is quite dated, and was tested for BIG-IP version 9.4. You run BIG-IP version 14.1, so you need to research the iRule presented in the codeshare entry:
Will it work as is?
If it doesn't work, what are the minimal changes you will have to make?
Solution: Your solution should result in a functional iRule and any other helper objects that successfully blocks access to your web app if not sourced from any of five different IP address ranges.
Bonus challenge:
Alter the solution to support 20 different IP address ranges, if necessary
Alter the solution again to support 100 different IP address ranges, if necessary
Alter the solution to only block access to the web app based on source IP if the URL begins https://www.nerdknobs.local/admin-portal/
Questions for understanding:
In what situations should you analyze and potentially refactor iRules?
