The company that authored this "How to SSH Properly" blog post sells a product that will enable you to use SSH "properly" (according to their definition). That

The company that authored this "How to SSH Properly" blog post sells a product that will enable you to use SSH "properly" (according to their definition). That's not a coincidence, of course. It's purely sales and marketing. To be clear, the ultimate goal of this blog post is simply to get you or your employer to give them some of your money -- that's it. (To be clear, giving an external entity full control over authentication and authorization of your critical servers is definitely not doing "SSH properly", IMO!)