[root@iZ25yto49lqZ /]# mosquitto
1456469564: mosquitto version 1.4.8 (build date 2016-02-14 16:30:28+0000) starting
1456469564: Using default config.
1456469564: Opening ipv4 listen socket on port 1883.
1456469564: Opening ipv6 listen socket on port 1883.
1456469564: Warning: Address family not supported by protocol
1456469567: New connection from 100.97.122.0 on port 1883.
1456469567: Socket error on client <unknown>, disconnecting.
1456469567: New connection from 100.97.121.0 on port 1883.
1456469567: Socket error on client <unknown>, disconnecting.
1456469569: New connection from 100.97.123.0 on port 1883.
1456469569: Socket error on client <unknown>, disconnecting.
1456469571: New connection from 100.97.121.0 on port 1883.
1456469571: Socket error on client <unknown>, disconnecting.
1456469573: New connection from 100.97.123.0 on port 1883.
1456469573: Socket error on client <unknown>, disconnecting.
1456469573: New connection from 100.97.121.0 on port 1883.
1456469573: Socket error on client <unknown>, disconnecting.