Someone tried to access my IP from the Internet for several hours

[Baender]

I don't know if this is the everyday life of a firewall. At least I found it unusual. I have already set up Crowdsec and Caddy on the OPNsense. A domain is also available and is updated via DynDNS. However, no externally accessible services are currently running. During my regular visit to Crowdsec, I was amazed that an IP from Azerbaijan wanted to connect to my IP address for several hours. The IP was already blocked by the Crowdsec list due to firewallservices/pf-scan-multi_ports. I don't know whether they wanted to test whether the IP would be unblocked again after X amount of time. At some point I was assigned a new IP because it was dynamic and the event ended. What are your experiences or opinions on this?

[Patrick M. Hausen]

Your external IPv4 address if not behind CGNAT will be probed 24x7 as soon as you connect to the Internet.