MySQL服务器不会在非标准端口上启动

我试图让外部客户端通过一个非常严格的学院防火墙访问我的数据库服务器，即只有端口80和443打开。 为了允许客户端与服务器通信，我计划将服务器侦听的端口从（默认为MySQL）端口3306更改为端口80.在更改/var/mysql/my.cnf文件中的设置以反映更改我希望，MySQL服务器拒绝启动。

Server: Debian 8.0 x64 MySQL Server: 5.5.57-0+deb8u1 

configurationMySQL：（/etc/mysql/my.cnf）

 [client] port = 80 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 = 80 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp lc-messages-dir = /usr/share/mysql skip-external-locking #bind-address = 127.0.0.1 key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam-recover = BACKUP #max_connections = 100 #table_cache = 64 #thread_concurrency = 10 query_cache_limit = 1M query_cache_size = 16M #general_log_file = /var/log/mysql/mysql.log #general_log = 1 log_error = /var/log/mysql/error.log expire_logs_days = 10 max_binlog_size = 100M [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M !includedir /etc/mysql/conf.d/ 

注意：唯一的改变是对[client]端口，[mysqld]端口和注释'bind-address'。

在尝试启动服务器时，日志（/var/log/mysql/error.log）指出：

• iptables不工作 – 防火墙阻止DNS端口
• 为什么我的IPTables规则不适用于端口445（SMB）？
• 在公共IP上build议的最小开放端口configuration
• 无法在LXC容器内访问外部MySQL服务器
• 不能使用公共IP访问，但使用本地主机

 171013 1:25:50 [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. 171013 1:25:50 [Note] Plugin 'FEDERATED' is disabled. 171013 1:25:50 InnoDB: The InnoDB memory heap is disabled 171013 1:25:50 InnoDB: Mutexes and rw_locks use GCC atomic builtins 171013 1:25:50 InnoDB: Compressed tables use zlib 1.2.8 171013 1:25:50 InnoDB: Using Linux native AIO 171013 1:25:50 InnoDB: Initializing buffer pool, size = 128.0M 171013 1:25:50 InnoDB: Completed initialization of buffer pool 171013 1:25:50 InnoDB: highest supported file format is Barracuda. 171013 1:25:51 InnoDB: Waiting for the background threads to start 171013 1:25:52 InnoDB: 5.5.57 started; log sequence number 1595685 171013 1:25:52 [Note] Server hostname (bind-address): '0.0.0.0'; port: 80 171013 1:25:52 [Note] - '0.0.0.0' resolves to '0.0.0.0'; 171013 1:25:52 [Note] Server socket created on IP: '0.0.0.0'. 171013 1:25:52 [ERROR] Can't start server: Bind on TCP/IP port: Permission denied 171013 1:25:52 [ERROR] Do you already have another mysqld server running on port: 80 ? 171013 1:25:52 [ERROR] Aborting 171013 1:25:52 InnoDB: Starting shutdown... 171013 1:25:52 InnoDB: Shutdown completed; log sequence number 1595685 171013 1:25:52 [Note] /usr/sbin/mysqld: Shutdown complete 

这表明端口80正在被另一个进程使用，但是对于全新安装的服务器来说这是不对的。 只有MySQL服务器和Fail2Ban安装额外，另一个进程不能使用它。

'netstat -pln'证实了这一点：

 Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 3070/sshd tcp6 0 0 :::22 :::* LISTEN 3070/sshd Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ACC ] SEQPACKET LISTENING 969834547 1/systemd /run/udev/control unix 2 [ ACC ] STREAM LISTENING 969834550 1/systemd /run/systemd/journal/stdout unix 2 [ ACC ] STREAM LISTENING 970364573 1/systemd /run/systemd/private unix 2 [ ACC ] STREAM LISTENING 972931518 5692/python /var/run/fail2ban/fail2ban.sock 

任何人都可以提出一个解决这个和/或给出推理为什么服务器不会启动端口80？