MySQL：无法通过SSH连接到服务器。 '读取初始通信包'，系统错误：0

我正在运行Debian 8.2，安装非常新鲜。 我尝试使用Sequel Pro通过SSH连接到我的MySQL服务器。 我总是得到这个错误：

Lost connection to MySQL server at 'reading initial communication packet', system error: 0 

当我跑步

 mysql -u root -p 

在服务器上，一切正常。 但不是来自遥远的。

起初我以为它可能是iptables，所以我（暂时）禁用所有的规则。 iptables -L现在返回：

• Netfilter：通过VPN代理无效状态
• Logrotate删除而不是旋转
• 从服务器下载速度极其缓慢
• Debian，通过它的jar名称杀死java？
• 显示指定文件系统体系结构的最佳方法是什么？

 Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination 

然后我检查my.cnf，但是我能想到的所有参数看起来都是正确的：

 [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking bind-address = 127.0.0.1 

我的mysql日志文件的输出也看起来不错

 150609 17:15:07 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 150609 17:15:07 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead. 150609 17:15:07 [Note] /usr/sbin/mysqld (mysqld 5.5.43-0+deb8u1) starting as process 18347 ... 150609 17:15:07 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 150609 17:15:07 [Note] Plugin 'FEDERATED' is disabled. 150609 17:15:07 InnoDB: The InnoDB memory heap is disabled 150609 17:15:07 InnoDB: Mutexes and rw_locks use GCC atomic builtins 150609 17:15:07 InnoDB: Compressed tables use zlib 1.2.8 150609 17:15:07 InnoDB: Using Linux native AIO 150609 17:15:07 InnoDB: Initializing buffer pool, size = 128.0M 150609 17:15:07 InnoDB: Completed initialization of buffer pool 150609 17:15:07 InnoDB: highest supported file format is Barracuda. 150609 17:15:07 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended 150609 17:15:08 InnoDB: Waiting for the background threads to start 150609 17:15:09 InnoDB: 5.5.43 started; log sequence number 1654586 150609 17:15:09 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306 150609 17:15:09 [Note] - '127.0.0.1' resolves to '127.0.0.1'; 150609 17:15:09 [Note] Server socket created on IP: '127.0.0.1'. 150609 17:15:09 [Note] Event Scheduler: Loaded 0 events 150609 17:15:09 [Note] /usr/sbin/mysqld: ready for connections. 

而且我无法find任何与我的客户端configuration有关的问题：

 MySQL Host: 127.0.0.1 User: root Password: *** Port: 3306 SSH Host: mydomain.com SSH User: sshuser SSH Key: sshkey 

我也没有任何东西在/etc/hosts.allow和/etc/hosts.deny

请注意，SSH连接成功，但MySQL失败。

我搞不清楚了。 任何人都可以帮忙吗？