tcsd_selinux(8)

1tcsd_selinux(8)               SELinux Policy tcsd              tcsd_selinux(8)
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NAME

6       tcsd_selinux - Security Enhanced Linux Policy for the tcsd processes
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DESCRIPTION

9       Security-Enhanced  Linux secures the tcsd processes via flexible manda‐
10       tory access control.
11
12       The tcsd processes execute with the tcsd_t SELinux type. You can  check
13       if  you  have  these processes running by executing the ps command with
14       the -Z qualifier.
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16       For example:
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18       ps -eZ | grep tcsd_t
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21

ENTRYPOINTS

23       The tcsd_t SELinux type can be entered via the tcsd_exec_t file type.
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25       The default entrypoint paths for the tcsd_t domain are the following:
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27       /usr/sbin/tcsd
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PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
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33       You can see the context of a process using the -Z option to ps
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35       Policy  governs  the  access confined processes have to files.  SELinux
36       tcsd policy is very flexible allowing users to setup  their  tcsd  pro‐
37       cesses in as secure a method as possible.
38
39       The following process types are defined for tcsd:
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41       tcsd_t
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43       Note:  semanage  permissive  -a  tcsd_t can be used to make the process
44       type tcsd_t permissive. SELinux does  not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
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48

BOOLEANS

50       SELinux policy is customizable based on least  access  required.   tcsd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run tcsd with the tightest access possible.
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56       If you want to allow users to resolve user passwd entries directly from
57       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
58       gin_nsswitch_use_ldap boolean. Disabled by default.
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60       setsebool -P authlogin_nsswitch_use_ldap 1
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64       If you want to allow all daemons to write corefiles to /, you must turn
65       on the daemons_dump_core boolean. Disabled by default.
66
67       setsebool -P daemons_dump_core 1
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71       If  you  want  to enable cluster mode for daemons, you must turn on the
72       daemons_enable_cluster_mode boolean. Enabled by default.
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74       setsebool -P daemons_enable_cluster_mode 1
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78       If you want to allow all daemons to use tcp wrappers, you must turn  on
79       the daemons_use_tcp_wrapper boolean. Disabled by default.
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81       setsebool -P daemons_use_tcp_wrapper 1
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85       If  you  want to allow all daemons the ability to read/write terminals,
86       you must turn on the daemons_use_tty boolean. Disabled by default.
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88       setsebool -P daemons_use_tty 1
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92       If you want to deny any process from ptracing or  debugging  any  other
93       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
94       default.
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96       setsebool -P deny_ptrace 1
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100       If you want to allow any process  to  mmap  any  file  on  system  with
101       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
102       ean. Enabled by default.
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104       setsebool -P domain_can_mmap_files 1
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108       If you want to allow all domains write to kmsg_device, while kernel  is
109       executed  with  systemd.log_target=kmsg parameter, you must turn on the
110       domain_can_write_kmsg boolean. Disabled by default.
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112       setsebool -P domain_can_write_kmsg 1
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116       If you want to allow all domains to use other domains file descriptors,
117       you must turn on the domain_fd_use boolean. Enabled by default.
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119       setsebool -P domain_fd_use 1
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122
123       If  you  want to allow all domains to have the kernel load modules, you
124       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
125       default.
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127       setsebool -P domain_kernel_load_modules 1
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130
131       If you want to allow all domains to execute in fips_mode, you must turn
132       on the fips_mode boolean. Enabled by default.
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134       setsebool -P fips_mode 1
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138       If you want to enable reading of urandom for all domains, you must turn
139       on the global_ssp boolean. Disabled by default.
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141       setsebool -P global_ssp 1
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145       If  you  want  to allow confined applications to run with kerberos, you
146       must turn on the kerberos_enabled boolean. Enabled by default.
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148       setsebool -P kerberos_enabled 1
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151
152       If you want to allow system to run with  NIS,  you  must  turn  on  the
153       nis_enabled boolean. Disabled by default.
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155       setsebool -P nis_enabled 1
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159       If  you  want to allow confined applications to use nscd shared memory,
160       you must turn on the nscd_use_shm boolean. Disabled by default.
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162       setsebool -P nscd_use_shm 1
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PORT TYPES

167       SELinux defines port types to represent TCP and UDP ports.
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169       You can see the types associated with a port  by  using  the  following
170       command:
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172       semanage port -l
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174
175       Policy  governs  the  access  confined  processes  have to these ports.
176       SELinux tcsd policy is very flexible allowing users to setup their tcsd
177       processes in as secure a method as possible.
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179       The following port types are defined for tcsd:
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181
182       tcs_port_t
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186       Default Defined Ports:
187                 tcp 30003
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MANAGED FILES

190       The  SELinux process type tcsd_t can manage files labeled with the fol‐
191       lowing file types.  The paths listed are the default  paths  for  these
192       file types.  Note the processes UID still need to have DAC permissions.
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194       cluster_conf_t
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196            /etc/cluster(/.*)?
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198       cluster_var_lib_t
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200            /var/lib/pcsd(/.*)?
201            /var/lib/cluster(/.*)?
202            /var/lib/openais(/.*)?
203            /var/lib/pengine(/.*)?
204            /var/lib/corosync(/.*)?
205            /usr/lib/heartbeat(/.*)?
206            /var/lib/heartbeat(/.*)?
207            /var/lib/pacemaker(/.*)?
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209       cluster_var_run_t
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211            /var/run/crm(/.*)?
212            /var/run/cman_.*
213            /var/run/rsctmp(/.*)?
214            /var/run/aisexec.*
215            /var/run/heartbeat(/.*)?
216            /var/run/corosync-qnetd(/.*)?
217            /var/run/corosync-qdevice(/.*)?
218            /var/run/cpglockd.pid
219            /var/run/corosync.pid
220            /var/run/rgmanager.pid
221            /var/run/cluster/rgmanager.sk
222
223       root_t
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225            /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
226            /
227            /initrd
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229       tcsd_var_lib_t
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231            /var/lib/tpm(/.*)?
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FILE CONTEXTS

235       SELinux requires files to have an extended attribute to define the file
236       type.
237
238       You can see the context of a file using the -Z option to ls
239
240       Policy governs the access  confined  processes  have  to  these  files.
241       SELinux tcsd policy is very flexible allowing users to setup their tcsd
242       processes in as secure a method as possible.
243
244       STANDARD FILE CONTEXT
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246       SELinux defines the file context types for the tcsd, if you  wanted  to
247       store  files  with  these types in a diffent paths, you need to execute
248       the semanage command  to  sepecify  alternate  labeling  and  then  use
249       restorecon to put the labels on disk.
250
251       semanage fcontext -a -t tcsd_var_lib_t '/srv/mytcsd_content(/.*)?'
252       restorecon -R -v /srv/mytcsd_content
253
254       Note:  SELinux  often  uses  regular expressions to specify labels that
255       match multiple files.
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257       The following file types are defined for tcsd:
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261       tcsd_exec_t
262
263       - Set files with the tcsd_exec_t type, if you  want  to  transition  an
264       executable to the tcsd_t domain.
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267
268       tcsd_initrc_exec_t
269
270       - Set files with the tcsd_initrc_exec_t type, if you want to transition
271       an executable to the tcsd_initrc_t domain.
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275       tcsd_var_lib_t
276
277       - Set files with the tcsd_var_lib_t type, if you want to store the tcsd
278       files under the /var/lib directory.
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282       Note:  File context can be temporarily modified with the chcon command.
283       If you want to permanently change the file context you need to use  the
284       semanage fcontext command.  This will modify the SELinux labeling data‐
285       base.  You will need to use restorecon to apply the labels.
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COMMANDS

289       semanage fcontext can also be used to manipulate default  file  context
290       mappings.
291
292       semanage  permissive  can  also  be used to manipulate whether or not a
293       process type is permissive.
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295       semanage module can also be used to enable/disable/install/remove  pol‐
296       icy modules.
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298       semanage port can also be used to manipulate the port definitions
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300       semanage boolean can also be used to manipulate the booleans
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302
303       system-config-selinux is a GUI tool available to customize SELinux pol‐
304       icy settings.
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AUTHOR

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