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crontab_selinux(8)	    SELinux Policy crontab	    crontab_selinux(8)

NAME
       crontab_selinux	-  Security Enhanced Linux Policy for the crontab pro‐
       cesses

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

       The  crontab processes execute with the crontab_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 crontab_t

ENTRYPOINTS
       The  crontab_t  SELinux type can be entered via the crontab_exec_t file
       type.

       The default entrypoint paths for the crontab_t domain are  the  follow‐
       ing:

       /usr/bin/(f)?crontab, /usr/bin/at, /usr/sbin/fcronsighup

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
       crontab	policy	is very flexible allowing users to setup their crontab
       processes in as secure a method as possible.

       The following process types are defined for crontab:

       crontab_t

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

BOOLEANS
       SELinux policy is customizable based on least access required.  crontab
       policy is extremely flexible and has several booleans that allow you to
       manipulate  the	policy and run crontab with the tightest access possi‐
       ble.

       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 authlo‐
       gin_nsswitch_use_ldap boolean. Disabled by default.

       setsebool -P authlogin_nsswitch_use_ldap 1

       If you want to deny any process from ptracing or	 debugging  any	 other
       processes,  you	must  turn  on	the  deny_ptrace  boolean.  Enabled by
       default.

       setsebool -P deny_ptrace 1

       If you want to allow all domains to use other domains file descriptors,
       you must turn on the domain_fd_use boolean. Enabled by default.

       setsebool -P domain_fd_use 1

       If  you	want to allow all domains to have the kernel load modules, you
       must  turn  on  the  domain_kernel_load_modules	boolean.  Disabled  by
       default.

       setsebool -P domain_kernel_load_modules 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 enable reading of urandom for all domains, you must turn
       on the global_ssp boolean. Disabled by default.

       setsebool -P global_ssp 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. Disabled by default.

       setsebool -P nscd_use_shm 1

       If you want to support ecryptfs home directories, you must turn on  the
       use_ecryptfs_home_dirs boolean. Disabled by default.

       setsebool -P use_ecryptfs_home_dirs 1

       If  you	want  to support fusefs home directories, you must turn on the
       use_fusefs_home_dirs boolean. Disabled by default.

       setsebool -P use_fusefs_home_dirs 1

       If you want to support NFS home	directories,  you  must	 turn  on  the
       use_nfs_home_dirs boolean. Disabled by default.

       setsebool -P use_nfs_home_dirs 1

       If  you	want  to  support SAMBA home directories, you must turn on the
       use_samba_home_dirs boolean. Disabled by default.

       setsebool -P use_samba_home_dirs 1

NSSWITCH DOMAIN
       If you want to allow users to resolve user passwd entries directly from
       ldap  rather  then using a sssd server for the crontab_t, you must turn
       on the authlogin_nsswitch_use_ldap boolean.

       setsebool -P authlogin_nsswitch_use_ldap 1

       If you want to allow confined applications to run with kerberos for the
       crontab_t, you must turn on the kerberos_enabled boolean.

       setsebool -P kerberos_enabled 1

MANAGED FILES
       The  SELinux  process  type crontab_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.

       cgroup_t

	    /cgroup(/.*)?
	    /sys/fs/cgroup(/.*)?

       crontab_tmp_t

       faillog_t

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

       user_cron_spool_t

	    /var/spool/at(/.*)?
	    /var/spool/cron

       user_tmp_t

	    /var/run/user(/.*)?
	    /tmp/gconfd-.*

       var_auth_t

	    /var/ace(/.*)?
	    /var/rsa(/.*)?
	    /var/lib/abl(/.*)?
	    /var/lib/rsa(/.*)?
	    /var/lib/pam_ssh(/.*)?
	    /var/run/pam_ssh(/.*)?
	    /var/lib/pam_shield(/.*)?
	    /var/opt/quest/vas/vasd(/.*)?
	    /var/lib/google-authenticator(/.*)?

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	crontab	 policy is very flexible allowing users to setup their
       crontab processes in as secure a method as possible.

       STANDARD FILE CONTEXT

       SELinux defines the file context types for the crontab, 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 crontab_exec_t '/srv/crontab/content(/.*)?'
       restorecon -R -v /srv/mycrontab_content

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

       The following file types are defined for crontab:

       crontab_exec_t

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

       Paths:
	    /usr/bin/(f)?crontab, /usr/bin/at, /usr/sbin/fcronsighup

       crontab_tmp_t

       -  Set  files with the crontab_tmp_t type, if you want to store crontab
       temporary files in the /tmp directories.

       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 data‐
       base.  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 pol‐
       icy modules.

       semanage boolean can also be used to manipulate the booleans

       system-config-selinux is a GUI tool available to customize SELinux pol‐
       icy settings.

AUTHOR
       This manual page was auto-generated using sepolicy manpage .

SEE ALSO
       selinux(8),  crontab(8),	 semanage(8),  restorecon(8), chcon(1), sepol‐
       icy(8) , setsebool(8)

crontab				   13-11-20		    crontab_selinux(8)
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