4.4.4 mysql_secure_installation — Improve MySQL Installation Security — MySQL 5.7

4.4.4 mysql_secure_installation — Improve MySQL Installation Security

This program enables you to improve the security of your MySQL installation in the following ways:

You can set a password for root accounts.
You can remove root accounts that are accessible from outside the local host.
You can remove anonymous-user accounts.
You can remove the test database (which by default can be accessed by all users, even anonymous users), and privileges that permit anyone to access databases with names that start with test_.

mysql_secure_installation helps you implement security recommendations similar to those described at Section 2.9.4, “Securing the Initial MySQL Account”.

Normal usage is to connect to the local MySQL server; invoke mysql_secure_installation without arguments:

mysql_secure_installation

When executed, mysql_secure_installation prompts you to determine which actions to perform.

The validate_password plugin can be used for password strength checking. If the plugin is not installed, mysql_secure_installation prompts the user whether to install it. Any passwords entered later are checked using the plugin if it is enabled.

Most of the usual MySQL client options such as --host and --port can be used on the command line and in option files. For example, to connect to the local server over IPv6 using port 3307, use this command:

mysql_secure_installation --host=::1 --port=3307

mysql_secure_installation supports the following options, which can be specified on the command line or in the [mysql_secure_installation] and [client] groups of an option file. For information about option files used by MySQL programs, see Section 4.2.2.2, “Using Option Files”.

Table 4.10 mysql_secure_installation Options

Table 4.10 mysql_secure_installation Options
Option Name	Description	Introduced
--defaults-extra-file	Read named option file in addition to usual option files
--defaults-file	Read only named option file
--defaults-group-suffix	Option group suffix value
--help	Display help message and exit
--host	Host on which MySQL server is located
--no-defaults	Read no option files
--password	Accepted but always ignored. Whenever mysql_secure_installation is invoked, the user is prompted for a password, regardless
--port	TCP/IP port number for connection
--print-defaults	Print default options
--protocol	Transport protocol to use
--socket	Unix socket file or Windows named pipe to use
--ssl	Enable connection encryption
--ssl-ca	File that contains list of trusted SSL Certificate Authorities
--ssl-capath	Directory that contains trusted SSL Certificate Authority certificate files
--ssl-cert	File that contains X.509 certificate
--ssl-cipher	Permissible ciphers for connection encryption
--ssl-crl	File that contains certificate revocation lists
--ssl-crlpath	Directory that contains certificate revocation-list files
--ssl-key	File that contains X.509 key
--ssl-mode	Desired security state of connection to server	5.7.11
--ssl-verify-server-cert	Verify host name against server certificate Common Name identity
--tls-version	Permissible TLS protocols for encrypted connections	5.7.10
--use-default	Execute with no user interactivity
--user	MySQL user name to use when connecting to server

--help, -?

Command-Line Format --help

Display a help message and exit.
--defaults-extra-file=file_name

Command-Line Format --defaults-extra-file=file_name

Type File name

Read this option file after the global option file but (on Unix) before the user option file. If the file does not exist or is otherwise inaccessible, an error occurs. If file_name is not an absolute path name, it is interpreted relative to the current directory.

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--defaults-file=file_name

Command-Line Format --defaults-file=file_name

Type File name

Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs. If file_name is not an absolute path name, it is interpreted relative to the current directory.

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--defaults-group-suffix=str

Command-Line Format --defaults-group-suffix=str

Type String

Read not only the usual option groups, but also groups with the usual names and a suffix of str. For example, mysql_secure_installation normally reads the [client] and [mysql_secure_installation] groups. If this option is given as --defaults-group-suffix=_other, mysql_secure_installation also reads the [client_other] and [mysql_secure_installation_other] groups.

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--host=host_name, -h host_name

Command-Line Format --host

Connect to the MySQL server on the given host.
--no-defaults

Command-Line Format --no-defaults

Do not read any option files. If program startup fails due to reading unknown options from an option file, --no-defaults can be used to prevent them from being read.

The exception is that the .mylogin.cnf file is read in all cases, if it exists. This permits passwords to be specified in a safer way than on the command line even when --no-defaults is used. To create .mylogin.cnf, use the mysql_config_editor utility. See Section 4.6.6, “mysql_config_editor — MySQL Configuration Utility”.

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--password=password, -p password

Command-Line Format --password=password

Type String

Default Value [none]

This option is accepted but ignored. Whether or not this option is used, mysql_secure_installation always prompts the user for a password.
--port=port_num, -P port_num

Command-Line Format --port=port_num

Type Numeric

Default Value 3306

For TCP/IP connections, the port number to use.
--print-defaults

Command-Line Format --print-defaults

Print the program name and all options that it gets from option files.

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling”.
--protocol={TCP|SOCKET|PIPE|MEMORY}

Command-Line Format --protocol=type

Type String

Default Value [see text]

Valid Values
TCP

SOCKET

PIPE

MEMORY

The transport protocol to use for connecting to the server. It is useful when the other connection parameters normally result in use of a protocol other than the one you want. For details on the permissible values, see Section 4.2.5, “Connection Transport Protocols”.
--socket=path, -S path

Command-Line Format --socket={file_name|pipe_name}

Type String

For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.

On Windows, this option applies only if the server was started with the named_pipe system variable enabled to support named-pipe connections. In addition, the user making the connection must be a member of the Windows group specified by the named_pipe_full_access_group system variable.
--ssl*

Options that begin with --ssl specify whether to connect to the server using encryption and indicate where to find SSL keys and certificates. See Command Options for Encrypted Connections.

Command-Line Format	`--help`

Command-Line Format	`--defaults-extra-file=file_name`
Type	File name

Command-Line Format	`--defaults-file=file_name`
Type	File name

Command-Line Format	`--defaults-group-suffix=str`
Type	String

Command-Line Format	`--host`

Command-Line Format	`--no-defaults`

Command-Line Format	`--password=password`
Type	String
Default Value	`[none]`

Command-Line Format	`--port=port_num`
Type	Numeric
Default Value	`3306`

Command-Line Format	`--print-defaults`

Command-Line Format	`--protocol=type`
Type	String
Default Value	`[see text]`
Valid Values	`TCP` `SOCKET` `PIPE` `MEMORY`

Command-Line Format	`--socket={file_name\|pipe_name}`
Type	String

--tls-version=protocol_list

Command-Line Format	`--tls-version=protocol_list`
Introduced	5.7.10
Type	String
Default Value (≥ 5.7.28)	`TLSv1,TLSv1.1,TLSv1.2`
Default Value (≤ 5.7.27)	`TLSv1,TLSv1.1,TLSv1.2` (OpenSSL) `TLSv1,TLSv1.1` (yaSSL)

The permissible TLS protocols for encrypted connections. The value is a list of one or more comma-separated protocol names. The protocols that can be named for this option depend on the SSL library used to compile MySQL. For details, see Section 6.3.2, “Encrypted Connection TLS Protocols and Ciphers”.

This option was added in MySQL 5.7.10.

--use-default

Command-Line Format --use-default

Type Boolean

Execute noninteractively. This option can be used for unattended installation operations.
--user=user_name, -u user_name

Command-Line Format --user=user_name

Type String

The user name of the MySQL account to use for connecting to the server.