Opening a Port in CSF Firewall via SSH
- Access your Linux server through SSH. Use any text editor to open the csf.conf file.
/etc/csf/csf.conf - Insert the port you want to open and restart the CSF firewall for the changes to take effect.
# Allow incoming TCP ports
TCP_IN = "20,443,465,21,22,587,993,25,53,80,110,143,995"
# Allow outgoing TCP ports
TCP_OUT = "20,21,443,587,22,25,80,110,43,53" - csf -r // This command restarts the CSF firewall
Opening a Port in CSF Firewall via WHM
- Log in to WHM.
- Enter firewall in the Find bar and click on the ConfigServer Security&Firewall link.
- Click the Firewall Configuration button.
- Scroll down to find the Allow incoming TCP ports section. Input the port you wish to open and click on the Change button at the bottom to save your changes.
- Finally, you will need to restart CSF by clicking on the Restart csf+lfd button.