Setting up rsync daemon and rsync data not-over ssh on CentOS 6.8

### Reference

link-1 link-2 link-3 

### Version Information

All Servers OS : CentOS 6.8
rsync : 1.26

### Network Infrastructure

Rsyncd Server (rsync_Server) : 192.168.10.100
Backup Client (rsync_Client) : 192.168.20.100

### Config

## Execute following commands on rsync_Server

# set iptables
sudo /sbin/iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 873 -j ACCEPT

sudo /sbin/service iptables save
sudo /sbin/service iptables restart

# daemonized rsync service and assign config file
sudo /bin/mkdir -p /etc/rsyncd

cd /etc/xinetd.d
sudo /bin/sed -i 's/disable = yes/disable = no/' rsync
sudo /bin/sed -i '/server_args.*/d' rsync
sudo /bin/sed -i '/\{/i\ server_args = --daemon --config=\/etc\/rsyncd\/rsyncd.conf' rsync

cd /etc/rsyncd
sudo /bin/cat << EOF > rsyncd.conf

### GLOBAL OPTIONS ###

#motd file = /etc/rsyncd/rsyncd.motd
pid file = /var/run/rsync.pid

### GLOBAL OPTIONS ###

### Modules ###

[DATA_BACKUP]
path = /data/bak/rsync_backup_data
uid = root
gid = root
read only = no
use chroot = yes

# limit access
auth users = rsync_user
secrets file = /etc/rsyncd/rsyncd.passwd
hosts allow = 192.168.20.100
hosts deny = *
max connections = 5

# log
transfer logging = yes
log file = /var/log/rsync.log
log format = %t %a %m %f %b

#syslog facility = local3
#lock file = /var/run/rsync.lock

timeout = 300

### Modules ###

EOF

# setup rsync password file
sudo /bin/cat << EOF > /etc/rsyncd/rsyncd.passwd
rsync_user:rsync_pass
EOF

sudo chown root:root /etc/rsyncd/rsyncd.passwd
sudo chmod 600 /etc/rsyncd/rsyncd.passwd

## Execute following commands on rsync_Client# setup rsync password file

sudo /bin/cat << EOF > /etc/rsyncd/login.passwd
rsync_pass
EOF

sudo chown root:root /etc/rsyncd/login.passwd
sudo chmod 600 /etc/rsyncd/login.passwd

### Execute rsync to backup files

## Execute following commands on rsync_Client
# rsync from <src_backup_dir> to dst_dir(module:<DATA_BACKUP>)
sudo /usr/bin/rsync -av --delete --password-file=/etc/rsyncd/login.passwd <src_backup_dir>/ rsync_user@192.168.10.100::DATA_BACKUP