Changing SSH port is far more efficacious at reducing nonsense than the Twitter poll in the article suggests:
> "I ran an experiment with a virtual machine exposed to the internet which had sshd listening on port 22. The server stayed online for one week and then I changed the ssh port to 222. The number of attacks dropped by 98%. Even though this is solely empirical evidence, it’s clear that moving off the standard ssh port reduces your server’s profile."[0]
> "In the time that I gathered 7,025 connection attempts to my SSH daemon on port 22 I received 3 on port 24."[1]
Also, great top comment by 16s[2] in this HN thread, "Why putting SSH on another port than 22 is bad idea".[3]
[0] https://major.io/2013/05/14/changing-your-ssh-servers-port-f...
[1] https://danielmiessler.com/blog/security-and-obscurity-does-...