Fail2Ban protection VS custom SSH port

Do I need Fail2Ban protection when I configured a different SSH port from 22? I feel that having a custom port (not 22) is the most simple protection against robots.

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For poorly scripted robots, yes. For good scripted bots and humans, no. If you write a ssh attack tool, you can ping the port first I believe. Best thing is to always get your limits up so installing fail2ban is always useful.