Today I’m giving you the task of reviewing and improving a small script I’ve written, and one of you will win a free Level 4 RouterOS licence. 

Background: I had need of a script to find the interfaces associated with any default routes in order to create matching firewall entries, and it had to work with RouterOS v6.

This script searches through any default route (dst-address=0.0.0.0/0) and adds it to an array so long as the interface can’t already be found in the array. I don’t often use arrays in MikroTik so the first version has a search function that doesn’t loop through the array, but instead just converts it to a string again to run the find command (Line 8)

Continue reading Scriptlet: Find Default Route Interface Names (and a free licence!) →