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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?

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    Besides Atarax reply, note that the source IP address is ::1 which is localhost in IPv6 that is this traffic started from the computer itself. It is not a visit coming from outside. – Patrick Mevzek Feb 27 at 22:47
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Don't worry, this is normal.

When the Apache HTTP Server manages its child processes, it needs a way to wake up processes that are listening for new connections. To do this, it sends a simple HTTP request back to itself.

Everything is explained here: https://cwiki.apache.org/confluence/display/HTTPD/InternalDummyConnection

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