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courier_tcpd_selinux(8)	  SELinux Policy courier_tcpd  courier_tcpd_selinux(8)

NAME
       courier_tcpd_selinux   -	  Security   Enhanced  Linux  Policy  for  the
       courier_tcpd processes

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

       The  courier_tcpd  processes  execute  with  the courier_tcpd_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 courier_tcpd_t

ENTRYPOINTS
       The    courier_tcpd_t   SELinux	 type	can   be   entered   via   the
       courier_tcpd_exec_t file type.

       The default entrypoint paths for the courier_tcpd_t domain are the fol‐
       lowing:

       /usr/sbin/couriertcpd

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

       The following process types are defined for courier_tcpd:

       courier_tcpd_t

       Note: semanage permissive -a courier_tcpd_t can be  used	 to  make  the
       process type courier_tcpd_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.
       courier_tcpd policy is extremely flexible and has several booleans that
       allow you to manipulate the policy and run courier_tcpd with the tight‐
       est access possible.

       If you want to allow all daemons to write corefiles to /, you must turn
       on the daemons_dump_core boolean. Disabled by default.

       setsebool -P daemons_dump_core 1

       If  you	want  to enable cluster mode for daemons, you must turn on the
       daemons_enable_cluster_mode boolean. Enabled by default.

       setsebool -P daemons_enable_cluster_mode 1

       If you want to allow all daemons to use tcp wrappers, you must turn  on
       the daemons_use_tcp_wrapper boolean. Disabled by default.

       setsebool -P daemons_use_tcp_wrapper 1

       If  you	want to allow all daemons the ability to read/write terminals,
       you must turn on the daemons_use_tty boolean. Disabled by default.

       setsebool -P daemons_use_tty 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

MANAGED FILES
       The  SELinux  process type courier_tcpd_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 per‐
       missions.

       cluster_conf_t

	    /etc/cluster(/.*)?

       cluster_var_lib_t

	    /var/lib/pcsd(/.*)?
	    /var/lib/cluster(/.*)?
	    /var/lib/openais(/.*)?
	    /var/lib/pengine(/.*)?
	    /var/lib/corosync(/.*)?
	    /usr/lib/heartbeat(/.*)?
	    /var/lib/heartbeat(/.*)?
	    /var/lib/pacemaker(/.*)?

       cluster_var_run_t

	    /var/run/crm(/.*)?
	    /var/run/cman_.*
	    /var/run/rsctmp(/.*)?
	    /var/run/aisexec.*
	    /var/run/heartbeat(/.*)?
	    /var/run/cpglockd.pid
	    /var/run/corosync.pid
	    /var/run/rgmanager.pid
	    /var/run/cluster/rgmanager.sk

       courier_var_lib_t

	    /var/lib/courier(/.*)?
	    /var/lib/courier-imap(/.*)?

       courier_var_run_t

	    /var/run/courier(/.*)?

       root_t

	    /
	    /initrd

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

       STANDARD FILE CONTEXT

       SELinux	defines	 the  file  context types for the courier_tcpd, 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  courier_tcpd_exec_t  '/srv/courier_tcpd/con‐
       tent(/.*)?'
       restorecon -R -v /srv/mycourier_tcpd_content

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

       The following file types are defined for courier_tcpd:

       courier_tcpd_exec_t

       - Set files with the courier_tcpd_exec_t type, if you want  to  transi‐
       tion an executable to the courier_tcpd_t domain.

       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),  courier_tcpd(8),  semanage(8),  restorecon(8),   chcon(1),
       sepolicy(8) , setsebool(8)

courier_tcpd			   13-11-20	       courier_tcpd_selinux(8)
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