I'm checking the logs of my Apache server, and I've found thousands of records per day like the following one:
::1 - - [23/Feb/2020:21:56:23 -0500] "OPTIONS * HTTP/1.0" 200 110 "-" "Apache/2.4.41 (Unix) OpenSSL/1.0.2r (internal dummy connection)"
What is it? Why am I receiving this kind of visit? Should be worried or not?