Changing Port No

1. Changing FTP port number
# ps aux | grep ftp --> to check which ftp server
if it is pure-ftpd
# vi /etc/pure-ftpd.conf
under IP address/port to listen to add a new line as Bind *,2121
# service pure-ftpd restart
Replace the same port on your csf configuration file /etc/csf.conf and restart csf

2. Changing ssh port
# vi /etc/ssh/sshd_config
#Port 22 default line to Port 9555(as you required, not 0-1024)
# service sshd restart
Replace the same port on your csf configuration file /etc/csf.conf and restart csf