This document describes how to install and configure ProFTPD in CentOS Server. ProFTPD is an FTP daemon for unix and unix-like operating systems. ProFTPD is developed, released and distributed under the GNU Public License (GPL), which basically establishes it as free software, meaning that it may be sold, licensed and otherwise manipulated in any way desired as long as full and complete source code either accompanies any ProFTPD packages or is made available by any and all sites that distribute pre-compiled binaries. The software can be modified by anyone at anytime, as long as all derived works also are licensed under the GNU Public License.
How to connect
I used sftp://purproxy.net as host to connect to my ftp.
Adding wordpress writing permissions
After installing wordpress : Add below code in wp-config.php
and the command line :
chown -R apache:apache /var/www/html