MENU

Linux 允许或禁止指定用户进行 SSH 登录

2020 年 10 月 25 日 • 系统

参考资料


允许指定用户登录(白名单)

在 sshd 的配置文件 /etc/ssh/sshd_config 中添加 AllowUsers 项,其后方跟随以空格分隔的用户名 PATTERN 列表。
例如允许 test-a 用户和从 192.168.1.100 登录的 test-b 用户:

AllowUsers test-a test-b@192.168.1.100

原文

This keyword can be followed by a list of user name patterns, separated by spaces.
If specified, login is allowed only for user names that match one of the patterns.
Only user names are valid; a numerical user ID is not recognized.
By default, login is allowed for all users.
If the pattern takes the form USER@HOST then USER and HOST are separately checked, restricting logins to particular users from particular hosts.
The allow/deny directives are processed in the following order: DenyUsers, AllowUsers, DenyGroups, and finally AllowGroups.

禁止指定用户登录(黑名单)

在 sshd 的配置文件 /etc/ssh/sshd_config 中添加 DenyUsers 项,,其后方跟随以空格分隔的用户名 PATTERN 列表。
例如禁止 test-c 用户和从 192.168.1.100 登录的 test-d 用户:

DenyUsers test-c test-d@192.168.1.100

原文

This keyword can be followed by a list of user name patterns, separated by spaces.
Login is disallowed for user names that match one of the patterns.
Only user names are valid; a numerical user ID is not recognized.
By default, login is allowed for all users.
If the pattern takes the form USER@HOST then USER and HOST are separately checked, restricting logins to particular users from particular hosts.
The allow/deny directives are processed in the following order: DenyUsers, AllowUsers, DenyGroups, and finally AllowGroups.

PATTERN

一个 PATTERN 由零个或多个非空白字符以及“*”(匹配零个或多个字符的通配符)或“?”(仅匹配一个字符的通配符)组成。
例如匹配主机 192.168.0.0 ~ 192.168.0.9,可以使用:

192.168.0.?

原文

A pattern consists of zero or more non-whitespace characters, ‘*’ (a wildcard that matches zero or more characters), or ‘?’ (a wildcard that matches exactly one character).
For example, to specify a set of declarations for any host in the “.co.uk” set of domains, the following pattern could be used:

    Host *.co.uk

The following pattern would match any host in the 192.168.0.[0-9] network range:

    Host 192.168.0.?

A pattern-list is a comma-separated list of patterns.
Patterns within pattern-lists may be negated by preceding them with an exclamation mark (‘!’).
For example, to allow a key to be used from anywhere within an organisation except from the “dialup” pool, the following entry (in authorized_keys) could be used:

    from="!*.dialup.example.com,*.example.com"

注意

  • 配置完成后需要重启 sshd 服务(例如 service sshd restart)。
  • 配置的 allow / deny 指令按照此顺序进行处理:DenyUsers -> AllowUsers -> DenyGroups -> AllowGroups
最后编辑于: 2021 年 09 月 12 日
返回文章列表 打赏
本页链接的二维码
打赏二维码