ssh -L 3305:127.0.0.1:3306 tunneluser@192.168.0.105 -f -N

mysql> SHOW SLAVE STATUS G
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: 127.0.0.1
                  Master_User: slave_user
                  Master_Port: 3305
                  ...
             Slave_IO_Running: Connecting
            Slave_SQL_Running: Yes
                  ...
                Last_IO_Errno: 2003
                Last_IO_Error: error connecting to master 'slave_user@127.0.0.1:3305' - retry-time: 10  retries: 1
                  ...
1 row in set (0.00 sec)

mysql -h 127.0.0.1 -P 3305 -u slave_user -p

sudo /usr/sbin/semanage port -a -t mysqld_port_t -p tcp 3305