Systems Administrator’s Lab: OpenSSH MaxStartups

When performing automation using OpenSSH/Cron you will inevitably run into concurrency problems. Recently, we had a problem where one machine was receiving 21 ssh connection within one second. This is because the standard cron daemon only has a granularity of one minute. In this article, I am going to quickly elaborate on how we spotted the problem, how we setup a verification test rig in our Lab and how we solved it. Quickly!

Systems Administrator’s Lab: OpenSSH MaxStartups