It seems to me IPv4 is broken beyond repair. I'm trying to block spammers but buy rewrite source IP (that is not checked) so it is impossible to block them. Example below is from a single source:
189.142.216.209 - - [20/May/2021:09:49:29 -0600] "GET /contact_us.php HTTP/1.0" 200 25552 82.79.97.137 - - [20/May/2021:09:49:31 -0600] "GET /vvc_display.php?vvc= HTTP/1.0" 200 4149 202.138.252.59 - - [20/May/2021:09:49:33 -0600] "POST /contact_us.php?action=send HTTP/1.0" 302 13 91.235.177.140 - - [20/May/2021:09:49:35 -0600] "GET /contact_us.php?action=success HTTP/1.0" 200 24031 41.82.36.214 - - [20/May/2021:09:49:37 -0600] "GET /contact_us.php HTTP/1.0" 200 25725
