I currently have a Centos server with iptables and I am currently getting attacks from several IP addresses to a specific port and I want to block those IPs.
I have tried several ways to block it, and the attack persists.
The attack method is SYN flood, RST & ACK.
I already checked here the length of the package to be able to block it, but I put the line and it does absolutely nothing.
EDIT: There are many IP addresses to block so I wanted to see if I could block the direct packet.