1nfsd_selinux(8)               SELinux Policy nfsd              nfsd_selinux(8)
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NAME

6       nfsd_selinux - Security Enhanced Linux Policy for the nfsd processes
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DESCRIPTION

9       Security-Enhanced  Linux secures the nfsd processes via flexible manda‐
10       tory access control.
11
12       The nfsd processes execute with the nfsd_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 nfsd_t
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20
21

ENTRYPOINTS

23       The nfsd_t SELinux type can be entered via the nfsd_exec_t file type.
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25       The default entrypoint paths for the nfsd_t domain are the following:
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27       /usr/lib/systemd/system-generators/nfs.*,           /usr/sbin/rpc.nfsd,
28       /usr/sbin/rpc.mountd
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PROCESS TYPES

31       SELinux defines process types (domains) for each process running on the
32       system
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34       You can see the context of a process using the -Z option to ps
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36       Policy governs the access confined processes have  to  files.   SELinux
37       nfsd  policy  is  very flexible allowing users to setup their nfsd pro‐
38       cesses in as secure a method as possible.
39
40       The following process types are defined for nfsd:
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42       nfsd_t
43
44       Note: semanage permissive -a nfsd_t can be used  to  make  the  process
45       type  nfsd_t  permissive.  SELinux  does  not deny access to permissive
46       process types, but the AVC (SELinux denials) messages are still  gener‐
47       ated.
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49

BOOLEANS

51       SELinux  policy  is  customizable based on least access required.  nfsd
52       policy is extremely flexible and has several booleans that allow you to
53       manipulate the policy and run nfsd with the tightest access possible.
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55
56
57       If you want to allow any files/directories to be exported read/only via
58       NFS, you must turn on the nfs_export_all_ro  boolean.  Enabled  by  de‐
59       fault.
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61       setsebool -P nfs_export_all_ro 1
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65       If  you  want  to allow any files/directories to be exported read/write
66       via NFS, you must turn on the nfs_export_all_rw boolean. Enabled by de‐
67       fault.
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69       setsebool -P nfs_export_all_rw 1
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73       If  you  want  to  dontaudit all daemons scheduling requests (setsched,
74       sys_nice), you must turn on the  daemons_dontaudit_scheduling  boolean.
75       Enabled by default.
76
77       setsebool -P daemons_dontaudit_scheduling 1
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80
81       If you want to allow all domains to execute in fips_mode, you must turn
82       on the fips_mode boolean. Enabled by default.
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84       setsebool -P fips_mode 1
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86
87
88       If you want to allow system to run with  NIS,  you  must  turn  on  the
89       nis_enabled boolean. Disabled by default.
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91       setsebool -P nis_enabled 1
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PORT TYPES

96       SELinux defines port types to represent TCP and UDP ports.
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98       You  can  see  the  types associated with a port by using the following
99       command:
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101       semanage port -l
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103
104       Policy governs the access  confined  processes  have  to  these  ports.
105       SELinux nfsd policy is very flexible allowing users to setup their nfsd
106       processes in as secure a method as possible.
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108       The following port types are defined for nfsd:
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110
111       nfs_port_t
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114
115       Default Defined Ports:
116                 tcp 2049,20048-20049
117                 udp 2049,20048-20049
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MANAGED FILES

120       The SELinux process type nfsd_t can manage files labeled with the  fol‐
121       lowing  file  types.   The paths listed are the default paths for these
122       file types.  Note the processes UID still need to have DAC permissions.
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124       cluster_conf_t
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126            /etc/cluster(/.*)?
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128       cluster_var_lib_t
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130            /var/lib/pcsd(/.*)?
131            /var/lib/cluster(/.*)?
132            /var/lib/openais(/.*)?
133            /var/lib/pengine(/.*)?
134            /var/lib/corosync(/.*)?
135            /usr/lib/heartbeat(/.*)?
136            /var/lib/heartbeat(/.*)?
137            /var/lib/pacemaker(/.*)?
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139       cluster_var_run_t
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141            /var/run/crm(/.*)?
142            /var/run/cman_.*
143            /var/run/rsctmp(/.*)?
144            /var/run/aisexec.*
145            /var/run/heartbeat(/.*)?
146            /var/run/pcsd-ruby.socket
147            /var/run/corosync-qnetd(/.*)?
148            /var/run/corosync-qdevice(/.*)?
149            /var/run/corosync.pid
150            /var/run/cpglockd.pid
151            /var/run/rgmanager.pid
152            /var/run/cluster/rgmanager.sk
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154       fsadm_var_run_t
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156            /var/run/fsck(/.*)?
157            /var/run/blkid(/.*)?
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159       glusterd_log_t
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161            /var/log/glusterfs(/.*)?
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163       glusterd_var_run_t
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165            /var/run/gluster(/.*)?
166            /var/run/glusterd.*
167            /var/run/glusterd.*
168            /var/run/glusterd(/.*)?
169
170       krb5_host_rcache_t
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172            /var/tmp/krb5_0.rcache2
173            /var/cache/krb5rcache(/.*)?
174            /var/tmp/nfs_0
175            /var/tmp/DNS_25
176            /var/tmp/host_0
177            /var/tmp/imap_0
178            /var/tmp/HTTP_23
179            /var/tmp/HTTP_48
180            /var/tmp/ldap_55
181            /var/tmp/ldap_487
182            /var/tmp/ldapmap1_0
183
184       mount_var_run_t
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186            /run/mount(/.*)?
187            /dev/.mount(/.*)?
188            /var/run/mount(/.*)?
189            /var/run/davfs2(/.*)?
190            /var/cache/davfs2(/.*)?
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192       nfsd_fs_t
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194
195       nfsd_tmp_t
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197
198       nfsd_unit_file_t
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200            /usr/lib/systemd/system/nfs.*
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202       root_t
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204            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
205            /
206            /initrd
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208       rpcd_var_run_t
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210            /var/run/sm-notify.*
211            /var/run/rpc.statd(/.*)?
212            /var/run/rpc.statd.pid
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214       var_lib_nfs_t
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216            /var/lib/nfs(/.*)?
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218       var_lib_t
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220            /opt/(.*/)?var/lib(/.*)?
221            /var/lib(/.*)?
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223

FILE CONTEXTS

225       SELinux requires files to have an extended attribute to define the file
226       type.
227
228       You can see the context of a file using the -Z option to ls
229
230       Policy  governs  the  access  confined  processes  have to these files.
231       SELinux nfsd policy is very flexible allowing users to setup their nfsd
232       processes in as secure a method as possible.
233
234       STANDARD FILE CONTEXT
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236       SELinux  defines  the file context types for the nfsd, if you wanted to
237       store files with these types in a different paths, you need to  execute
238       the  semanage  command  to  specify alternate labeling and then use re‐
239       storecon to put the labels on disk.
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241       semanage fcontext -a -t nfsd_fs_t '/srv/nfsd/content(/.*)?'
242       restorecon -R -v /srv/mynfsd_content
243
244       Note: SELinux often uses regular expressions  to  specify  labels  that
245       match multiple files.
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247       The following file types are defined for nfsd:
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251       nfsd_exec_t
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253       - Set files with the nfsd_exec_t type, if you want to transition an ex‐
254       ecutable to the nfsd_t domain.
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256
257       Paths:
258            /usr/lib/systemd/system-generators/nfs.*,      /usr/sbin/rpc.nfsd,
259            /usr/sbin/rpc.mountd
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261
262       nfsd_fs_t
263
264       -  Set files with the nfsd_fs_t type, if you want to treat the files as
265       nfsd fs data.
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268
269       nfsd_initrc_exec_t
270
271       - Set files with the nfsd_initrc_exec_t type, if you want to transition
272       an executable to the nfsd_initrc_t domain.
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276       nfsd_tmp_t
277
278       -  Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
279       rary files in the /tmp directories.
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283       nfsd_unit_file_t
284
285       - Set files with the nfsd_unit_file_t type, if you want  to  treat  the
286       files as nfsd unit content.
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289
290       Note:  File context can be temporarily modified with the chcon command.
291       If you want to permanently change the file context you need to use  the
292       semanage fcontext command.  This will modify the SELinux labeling data‐
293       base.  You will need to use restorecon to apply the labels.
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295

SHARING FILES

297       If you want to share files with multiple domains (Apache,  FTP,  rsync,
298       Samba),  you can set a file context of public_content_t and public_con‐
299       tent_rw_t.  These context allow any of the above domains  to  read  the
300       content.   If  you want a particular domain to write to the public_con‐
301       tent_rw_t domain, you must set the appropriate boolean.
302
303       Allow nfsd servers to read the /var/nfsd directory by adding  the  pub‐
304       lic_content_t  file  type  to  the  directory and by restoring the file
305       type.
306
307       semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
308       restorecon -F -R -v /var/nfsd
309
310       Allow nfsd servers to read and write /var/nfsd/incoming by  adding  the
311       public_content_rw_t  type  to  the  directory and by restoring the file
312       type.  You also need to turn on the nfsd_anon_write boolean.
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314       semanage fcontext -a -t public_content_rw_t "/var/nfsd/incoming(/.*)?"
315       restorecon -F -R -v /var/nfsd/incoming
316       setsebool -P nfsd_anon_write 1
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318
319       If you want to allow nfs servers to modify public files used for public
320       file  transfer services.  Files/Directories must be labeled public_con‐
321       tent_rw_t., you must turn on the nfsd_anon_write boolean.
322
323       setsebool -P nfsd_anon_write 1
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325

COMMANDS

327       semanage fcontext can also be used to manipulate default  file  context
328       mappings.
329
330       semanage  permissive  can  also  be used to manipulate whether or not a
331       process type is permissive.
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333       semanage module can also be used to enable/disable/install/remove  pol‐
334       icy modules.
335
336       semanage port can also be used to manipulate the port definitions
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338       semanage boolean can also be used to manipulate the booleans
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340
341       system-config-selinux is a GUI tool available to customize SELinux pol‐
342       icy settings.
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344

AUTHOR

346       This manual page was auto-generated using sepolicy manpage .
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SEE ALSO

350       selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
351       setsebool(8)
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355nfsd                               23-10-20                    nfsd_selinux(8)
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