Generating report on daily basis about user logons.

Third Party tool will be best option to pull user login details & many more. Other option is to check history of in F5(unix command)

 last

--> The last command fetch the details from /var/log/wtmp file and displays a list of all users logged-in and logged-out, If you want to show the particular user login history you can do it and if you want to show the particular tty login history you can do it using last command.

As Server administrator, you should check

 last login

history every day whether any anonymous login attempt found or not.