You may be interested in lazy-regex.

Some people also swear by other measures, like changing the SSH port to something else. Most people end up using 2222 to easily remember. This is borderline useless, as you can see for yourself.

While being useless against a sophisticated attacker, there hasn’t been any bot activity in my sshd logs since changing my ssh port to a different one.

Time to cargo rm once_cell!

Declaring the use without a paid license as “Unlicensed” is very misleading since the project is also licensed under the GNU AGPL v3.0.