When I ran an ssh server on port 22 (with root login and password login turned off), I would see quite a lot of random log-in attempts using root and various st

When I ran an ssh server on port 22 (with root login and password login turned off), I would see quite a lot of random log-in attempts using root and various stupid passwords. When I switched to some other port, they stopped. Less noise in my logs, hurray! Now, if I see something weird in my logs, chances are it's important.