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6.4. Changing the Default Mapping

In Red Hat Enterprise Linux, Linux users are mapped to the SELinux __default__ login by default (which is in turn mapped to the SELinux unconfined_u user). If you would like new Linux users, and Linux users not specifically mapped to an SELinux user to be confined by default, change the default mapping with the semanage login command.
For example, enter the following command as root to change the default mapping from unconfined_u to user_u: 
~]# semanage login -m -S targeted -s "user_u" -r s0 __default__
Verify the __default__ login is mapped to user_u: 
~]# semanage login -l

Login Name           SELinux User         MLS/MCS Range        Service

__default__          user_u               s0-s0:c0.c1023       *
root                 unconfined_u         s0-s0:c0.c1023       *
system_u             system_u             s0-s0:c0.c1023       *
If a new Linux user is created and an SELinux user is not specified, or if an existing Linux user logs in and does not match a specific entry from the semanage login -l output, they are mapped to user_u, as per the __default__ login.
To change back to the default behavior, enter the following command as root to map the __default__ login to the SELinux unconfined_u user: 
~]# semanage login -m -S targeted -s "unconfined_u" -r s0-s0:c0.c1023 __default__