AWS Reachability Analyzer

Motivated by one of those 'why can't A access B on AWS' questions I just saw, a short reminder - AWS has this thing called... Reachability Analyzer. The name is straight to the point, and such is the tool itself. It allows you to create a set of named paths between points in your infrastructure, and test if they can be traversed end to end or not. Apart from yes/no answer, you also get a nice…