It would be helpful if somebody could post what it looks for so I can add it to fail2ban. I tried opening up my website temporarily but it will cancel out if it

It would be helpful if somebody could post what it looks for so I can add it to fail2ban. I tried opening up my website temporarily but it will cancel out if it doesn't find something at /. When I retry sometimes it also says it is blocked when clearly there is not anything in my logs so it is not retrying.