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:
17
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
33
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:
41
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.
60
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.
68
69       setsebool -P nfs_export_all_rw 1
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73       If you want to allow all domains to execute in fips_mode, you must turn
74       on the fips_mode boolean. Enabled by default.
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76       setsebool -P fips_mode 1
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PORT TYPES

81       SELinux defines port types to represent TCP and UDP ports.
82
83       You can see the types associated with a port  by  using  the  following
84       command:
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86       semanage port -l
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88
89       Policy  governs  the  access  confined  processes  have to these ports.
90       SELinux nfsd policy is very flexible allowing users to setup their nfsd
91       processes in as secure a method as possible.
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93       The following port types are defined for nfsd:
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95
96       nfs_port_t
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100       Default Defined Ports:
101                 tcp 2049,20048-20049
102                 udp 2049,20048-20049
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MANAGED FILES

105       The  SELinux process type nfsd_t can manage files labeled with the fol‐
106       lowing file types.  The paths listed are the default  paths  for  these
107       file types.  Note the processes UID still need to have DAC permissions.
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109       cluster_conf_t
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111            /etc/cluster(/.*)?
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113       cluster_var_lib_t
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115            /var/lib/pcsd(/.*)?
116            /var/lib/cluster(/.*)?
117            /var/lib/openais(/.*)?
118            /var/lib/pengine(/.*)?
119            /var/lib/corosync(/.*)?
120            /usr/lib/heartbeat(/.*)?
121            /var/lib/heartbeat(/.*)?
122            /var/lib/pacemaker(/.*)?
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124       cluster_var_run_t
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126            /var/run/crm(/.*)?
127            /var/run/cman_.*
128            /var/run/rsctmp(/.*)?
129            /var/run/aisexec.*
130            /var/run/heartbeat(/.*)?
131            /var/run/pcsd-ruby.socket
132            /var/run/corosync-qnetd(/.*)?
133            /var/run/corosync-qdevice(/.*)?
134            /var/run/corosync.pid
135            /var/run/cpglockd.pid
136            /var/run/rgmanager.pid
137            /var/run/cluster/rgmanager.sk
138
139       fsadm_var_run_t
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141            /var/run/fsck(/.*)?
142            /var/run/blkid(/.*)?
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144       glusterd_log_t
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146            /var/log/glusterfs(/.*)?
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148       glusterd_var_run_t
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150            /var/run/gluster(/.*)?
151            /var/run/glusterd.*
152            /var/run/glusterd.*
153            /var/run/glusterd(/.*)?
154
155       krb5_host_rcache_t
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157            /var/tmp/krb5_0.rcache2
158            /var/cache/krb5rcache(/.*)?
159            /var/tmp/nfs_0
160            /var/tmp/DNS_25
161            /var/tmp/host_0
162            /var/tmp/imap_0
163            /var/tmp/HTTP_23
164            /var/tmp/HTTP_48
165            /var/tmp/ldap_55
166            /var/tmp/ldap_487
167            /var/tmp/ldapmap1_0
168
169       mount_var_run_t
170
171            /run/mount(/.*)?
172            /dev/.mount(/.*)?
173            /var/run/mount(/.*)?
174            /var/run/davfs2(/.*)?
175            /var/cache/davfs2(/.*)?
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177       nfsd_fs_t
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179
180       nfsd_tmp_t
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182
183       nfsd_unit_file_t
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185            /usr/lib/systemd/system/nfs.*
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187       root_t
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189            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
190            /
191            /initrd
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193       rpcd_var_run_t
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195            /var/run/sm-notify.*
196            /var/run/rpc.statd(/.*)?
197            /var/run/rpc.statd.pid
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199       var_lib_nfs_t
200
201            /var/lib/nfs(/.*)?
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203       var_lib_t
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205            /opt/(.*/)?var/lib(/.*)?
206            /var/lib(/.*)?
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208

FILE CONTEXTS

210       SELinux requires files to have an extended attribute to define the file
211       type.
212
213       You can see the context of a file using the -Z option to ls
214
215       Policy governs the access  confined  processes  have  to  these  files.
216       SELinux nfsd policy is very flexible allowing users to setup their nfsd
217       processes in as secure a method as possible.
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219       STANDARD FILE CONTEXT
220
221       SELinux defines the file context types for the nfsd, if you  wanted  to
222       store  files  with  these types in a diffent paths, you need to execute
223       the semanage command to specify alternate labeling  and  then  use  re‐
224       storecon to put the labels on disk.
225
226       semanage fcontext -a -t nfsd_tmp_t '/srv/mynfsd_content(/.*)?'
227       restorecon -R -v /srv/mynfsd_content
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229       Note:  SELinux  often  uses  regular expressions to specify labels that
230       match multiple files.
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232       The following file types are defined for nfsd:
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234
235
236       nfsd_exec_t
237
238       - Set files with the nfsd_exec_t type, if you want to transition an ex‐
239       ecutable to the nfsd_t domain.
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241
242       Paths:
243            /usr/lib/systemd/system-generators/nfs.*,      /usr/sbin/rpc.nfsd,
244            /usr/sbin/rpc.mountd
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246
247       nfsd_fs_t
248
249       - Set files with the nfsd_fs_t type, if you want to treat the files  as
250       nfsd fs data.
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254       nfsd_initrc_exec_t
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256       - Set files with the nfsd_initrc_exec_t type, if you want to transition
257       an executable to the nfsd_initrc_t domain.
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261       nfsd_tmp_t
262
263       - Set files with the nfsd_tmp_t type, if you want to store nfsd  tempo‐
264       rary files in the /tmp directories.
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268       nfsd_unit_file_t
269
270       -  Set  files  with the nfsd_unit_file_t type, if you want to treat the
271       files as nfsd unit content.
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274
275       Note: File context can be temporarily modified with the chcon  command.
276       If  you want to permanently change the file context you need to use the
277       semanage fcontext command.  This will modify the SELinux labeling data‐
278       base.  You will need to use restorecon to apply the labels.
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280

SHARING FILES

282       If  you  want to share files with multiple domains (Apache, FTP, rsync,
283       Samba), you can set a file context of public_content_t and  public_con‐
284       tent_rw_t.   These  context  allow any of the above domains to read the
285       content.  If you want a particular domain to write to  the  public_con‐
286       tent_rw_t domain, you must set the appropriate boolean.
287
288       Allow  nfsd  servers to read the /var/nfsd directory by adding the pub‐
289       lic_content_t file type to the directory  and  by  restoring  the  file
290       type.
291
292       semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
293       restorecon -F -R -v /var/nfsd
294
295       Allow  nfsd  servers to read and write /var/nfsd/incoming by adding the
296       public_content_rw_t type to the directory and  by  restoring  the  file
297       type.  You also need to turn on the nfsd_anon_write boolean.
298
299       semanage fcontext -a -t public_content_rw_t "/var/nfsd/incoming(/.*)?"
300       restorecon -F -R -v /var/nfsd/incoming
301       setsebool -P nfsd_anon_write 1
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303
304       If you want to allow nfs servers to modify public files used for public
305       file transfer services.  Files/Directories must be labeled  public_con‐
306       tent_rw_t., you must turn on the nfsd_anon_write boolean.
307
308       setsebool -P nfsd_anon_write 1
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310

COMMANDS

312       semanage  fcontext  can also be used to manipulate default file context
313       mappings.
314
315       semanage permissive can also be used to manipulate  whether  or  not  a
316       process type is permissive.
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318       semanage  module can also be used to enable/disable/install/remove pol‐
319       icy modules.
320
321       semanage port can also be used to manipulate the port definitions
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323       semanage boolean can also be used to manipulate the booleans
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325
326       system-config-selinux is a GUI tool available to customize SELinux pol‐
327       icy settings.
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329

AUTHOR

331       This manual page was auto-generated using sepolicy manpage .
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333

SEE ALSO

335       selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
336       setsebool(8)
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340nfsd                               23-02-03                    nfsd_selinux(8)
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