Using the Command Line Interface

Steps to open port in CSF

1) Login to the server using the SSH.

2) Open the configuration file of the CSF as follows.

vi /etc/csf/csf.conf

3) Add the required ports to the csf.conf file

# Allow incoming TCP ports

TCP_IN = “20,21,22,25,26,53,80,110,143,443,465,587,993,995”

# Allow outgoing TCP ports

TCP_OUT = “20,21,22,25,26,37,43,53,80,110,113,443,465,873”

4) Restart the CSF for the changes to take effect. Run the below command to restart the CSF.

csf -r