NAME¶

winbind_rpcd_selinux - Security Enhanced Linux Policy for the winbind_rpcd processes

DESCRIPTION¶

Security-Enhanced Linux secures the winbind_rpcd processes via flexible mandatory access control.

The winbind_rpcd processes execute with the winbind_rpcd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep winbind_rpcd_t

ENTRYPOINTS¶

The winbind_rpcd_t SELinux type can be entered via the winbind_rpcd_exec_t file type.

The default entrypoint paths for the winbind_rpcd_t domain are the following:

/usr/libexec/samba/rpcd_lsad, /usr/libexec/samba/samba-dcerpcd

PROCESS TYPES¶

SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to ps

Policy governs the access confined processes have to files. SELinux winbind_rpcd policy is very flexible allowing users to setup their winbind_rpcd processes in as secure a method as possible.

The following process types are defined for winbind_rpcd:

winbind_rpcd_t

Note: semanage permissive -a winbind_rpcd_t can be used to make the process type winbind_rpcd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS¶

SELinux policy is customizable based on least access required. winbind_rpcd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run winbind_rpcd with the tightest access possible.

If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the authlogin_nsswitch_use_ldap boolean. Disabled by default.

setsebool -P authlogin_nsswitch_use_ldap 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 1

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

If you want to allow samba to act as the domain controller, add users, groups and change passwords, you must turn on the samba_domain_controller boolean. Disabled by default.

setsebool -P samba_domain_controller 1

If you want to allow samba and winbind-rpcd to share users home directories, you must turn on the samba_enable_home_dirs boolean. Disabled by default.

setsebool -P samba_enable_home_dirs 1

If you want to allow samba to share any file/directory read only, you must turn on the samba_export_all_ro boolean. Disabled by default.

setsebool -P samba_export_all_ro 1

If you want to allow samba to share any file/directory read/write, you must turn on the samba_export_all_rw boolean. Disabled by default.

setsebool -P samba_export_all_rw 1

MANAGED FILES¶

The SELinux process type winbind_rpcd_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.

faillog_t

/var/log/btmp.*
/var/log/faillog.*
/var/log/tallylog.*
/var/run/faillock(/.*)?

non_security_file_type

noxattrfs

all files on file systems which do not support extended attributes

samba_log_t

/var/log/samba(/.*)?

samba_share_t

use this label for random content that will be shared using samba

samba_var_t

/var/nmbd(/.*)?
/var/lib/samba(/.*)?
/var/cache/samba(/.*)?

smbd_tmp_t

user_home_type

all user home files

winbind_rpcd_tmp_t

winbind_rpcd_var_run_t

FILE CONTEXTS¶

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls

Policy governs the access confined processes have to these files. SELinux winbind_rpcd policy is very flexible allowing users to setup their winbind_rpcd processes in as secure a method as possible.

STANDARD FILE CONTEXT

SELinux defines the file context types for the winbind_rpcd, if you wanted to store files with these types in a diffent paths, you need to execute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t winbind_rpcd_tmp_t '/srv/mywinbind_rpcd_content(/.*)?'
restorecon -R -v /srv/mywinbind_rpcd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for winbind_rpcd:

winbind_rpcd_exec_t

- Set files with the winbind_rpcd_exec_t type, if you want to transition an executable to the winbind_rpcd_t domain.

Paths:

/usr/libexec/samba/rpcd_lsad, /usr/libexec/samba/samba-dcerpcd

winbind_rpcd_tmp_t

- Set files with the winbind_rpcd_tmp_t type, if you want to store winbind rpcd temporary files in the /tmp directories.

winbind_rpcd_var_run_t

- Set files with the winbind_rpcd_var_run_t type, if you want to store the winbind rpcd files under the /run or /var/run directory.

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.

COMMANDS¶

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR¶

This manual page was auto-generated using sepolicy manpage .

SEE ALSO¶

selinux(8), winbind_rpcd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)