I’ll tell you more.
The provider’s optical cable comes to me, which goes to the router. The router has several ports. I can use any of them. The provider has allocated me several IP addresses. Basically, I use the same port and the same IP. Usually, the switch uses one port for my laptop. The other ports are free. Yesterday I connected different computers to different ports, and manually configured the network card parameters (IP, mask, gateway, dns-the provider does not have DHCP).
No matter what device I log in from, my site always defines the IP incorrectly as 193, although different IP addresses are registered on all three devices. If you disable the proxy settings on Cloudflare-the IP is determined correctly for all three devices.
When I leave work, I turn off my laptop and put it in the safe.
At the moment when I see accesses to the site from IP 193 in the nginx logs , there are no connected devices in the router. That is, these are not my devices.
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