Have ploblem with ddos fail2ban already banned and iptables already have ip but not work

have ploblem with ddos fail2ban already banned and iptables already have ip but not work.
log from apache2 still show log that ip can access

in this picture you will see ip of ploblem is 66.249.73.197 that show in apache2 log from some domain, then this ip have already banned from fail2ban detect and show in iptables too.

but log from apache2 still run that ip still ddos.

pls help i cannot stop ddos

Do you use Cloudflare proxy?

not use cloudflare proxy, because my server have multiple customer and they have multiple website too. i think they can’t manage how to use cloudflare before direct to my hosting server.