mysql不能打开本机3306端口

[pantaiyang]

mysql -h localhost -uroot -p能登录。
telnet localhost 3306成功。
但是：
pan@shooter:~$ mysql -h 172.27.130.236 -uroot -p
Enter password:
ERROR 2003 (HY000): Can't connect to MySQL server on '172.27.130.236' (111)
pan@shooter:~$telnet 172.27.130.236 3306
Trying 172.27.130.236...
telnet: Unable to connect to remote host: Connection refused
pan@shooter:~$

/etc/my.cnf没有bind-address这一行，防火墙关闭了，也没有更改mysql的端口号，为什么本机ip的3306端口不通？