本文介绍了如何在 openEuler 中设置 SELinux 状态。
SELinux 是一个提供强制访问控制的安全模块,限制进程对系统资源的访问。 当 SELinux 开启且强制执行时,它会阻止 chroot 其他系统的根目录修改密码,因为安全策略限制这些操作。
设置 SELinux 为许可模式会增加安全风险,使系统更易受到攻击,在充分了解设置 SELinux 为许可模式将对你的系统造成影响之后再进行以下操作。
- 使用
getenforce
查看 SELinux 状态:
[root@localhost ~]# getenforce
Enforcing
如果为 Enforcing
则表示 SELinux 为开启状态且强制执行。
- 使用
sestatus
查看 SELinux 状态
[root@localhost ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max kernel policy version: 33
如果为 Current mode: enforcing
则表示 SELinux 为开启状态且强制执行。
使用 setenforce 0
来将 SELinux 暂时设置为许可状态
[root@localhost ~]# setenforce 0
查看修改后的 SELinux 状态:
[root@localhost ~]# getenforce
Permissive
[root@localhost ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max kernel policy version: 33
编辑 /etc/selinux/config 文件
完整内容如下:
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of these three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
将 SELINUX=enforcing
修改为 SELINUX=permissive
然后重启即可。
重启后再查看 SELinux 状态如下:
[root@localhost ~]# getenforce
Permissive
[root@localhost ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: permissive
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max kernel policy version: 33