There is a moment every developer reaches, usually late at night, when something breaks and you realize you no longer understand your own setup. At first, it feels manageable. One VPS, one IP address, one SSH command. You memorize it. You trust it. You build on top of it. Then comes the second server. And the third. Suddenly you are juggling keys, IPs, environments, and access rules. You forget which key belongs to which machine. You paste commands from old terminal history hoping they still work. You log into the wrong server and restart the wrong service. You tell yourself it is fine. Then one day you notice something you should not ignore. Failed login attempts in your logs. Unknown IPs hitting port 22. Maybe nothing happens. Maybe something does and you do not notice until later. And without realizing it, you have exposed multiple machines directly to the internet, each one listening on port 22, each one waiting. This is where the idea of a bastion host enters.…