How to fix the FTP time out error

How to resolve the error :

[bash]!connection failed xx.xx.xxx.xxx – connection timed out
!connectio:error 0
PORT xxx,xxx,x,x,x,xxx
500 Illegal PORT command
!Failed "port"
!Retrieve of folder listing failed (0)[/bash]

This  error occurs when we are able to connect using FTP but folder listing fails!
Resolution:
1)Login to the WHM==> FTP Server Selection
2)change the FTP server to Pure-FTPD from PRO-FTP  ==>  Save
3)Now ssh into the server as root and open the pure-ftp conf file /etc/pure-ftpd.conf
4)Find the FTP port no: used the “PassivePortRange” from the config file
5)Add the port range into the config file
for eg :

[bash][/bash]PassivePortRange 30000 40000[bash][/bash]

6)Save and quit
7)Open the  csf(firewall) config file, add the ftp port along with the passive port range
eg :

[bash][/bash]# Allow incoming TCP ports
TCP_IN = “20,22,25,53,80,110,143,443,465,587,993,995,2001,2077,2078,2082,2083,2086,2087,
2095,2096,30000:40000″[bash][/bash]

8)Restart csf & Pure-ftpd