FAQ: How to Close/Restrict a Port on a Linux Server
How to Close/Restrict a Port on a Linux Server Using CSF and Iptables Using CSF (ConfigServer Security & Firewall) Block a Specific Port nano /etc/csf/csf.conf Remove the port you wish to close (e.g., 8080) from TCP_IN and TCP_OUT. Restart CSF to Apply Changes csf -r Using Iptables Delete Rule for a Specific Port iptables