Can't connect to MySQL server on 'x.x.x.x' (110) - mysql

Question

Hello I've an issue on MySQL I can't connect to it remotely, I already looked for the answers posted here but none of them works for me!
This is the Error Message when I trying to connect to mysql
$> mysql -u user01 -h x.x.x.x -p
ERROR 2003 (HY000): Can't connect to MySQL server on 'x.x.x.x' (110)
Telnet
[root#machine2 ~]# telnet x.x.x.x 3306
Trying x.x.x.x...
telnet: connect to address x.x.x.x: Connection timed out
This the IPTABLES file
#Generated by iptables-save v1.4.7 on Thu Jan 4 21:58:18 2018
*filter
:INPUT ACCEPT [56:6256]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [35:3538]
-A INPUT -p tcp -m tcp --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -i lo -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 3306 -m state --state ESTABLISHED -j ACCEPT
COMMIT
#Completed on Thu Jan 4 21:58:18 2018
-- I already create a user
CREATE USER 'user' IDENTIFIED BY 'pass';
GRANT ALL PRIVILEGES ON *.* TO 'user';
FLUSH PRIVILEGES;
and this is my.cnf file
#For advice on how to change settings please see
#http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
[mysqld]
port=3306
skip-name-resolve
skip-external-locking
innodb_buffer_pool_size=3G
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
and My port 3306 is already open
[root#localhost ~]# netstat -petulan
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 0 12889 2056/rpcbind
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 0 13930 2441/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 0 13141 2133/cupsd
tcp 0 0 0.0.0.0:32895 0.0.0.0:* LISTEN 29 12977 2078/rpc.statd
tcp 0 0 x.x.x.x:22 x.x.x.x:49964 ESTABLISHED 0 7891927 4453/sshd
tcp 0 64 x.x.x.x:22 x.x.x.x:50203 ESTABLISHED 0 7892871 4482/sshd
tcp 0 0 :::3306 :::* LISTEN 27 7896831 6648/mysqld
tcp 0 0 :::111 :::* LISTEN 0 12892 2056/rpcbind
Is there something here wrong ?, thank you !
I'm using CentOS 6.9