1nfsd_selinux(8) SELinux Policy nfsd nfsd_selinux(8)
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6 nfsd_selinux - Security Enhanced Linux Policy for the nfsd processes
7
9 Security-Enhanced Linux secures the nfsd processes via flexible manda‐
10 tory access control.
11 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.
15 For example:
17 ps -eZ | grep nfsd_t
19
23 The nfsd_t SELinux type can be entered via the nfsd_exec_t file type.
24 The default entrypoint paths for the nfsd_t domain are the following:
26 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
28 /usr/sbin/rpc.mountd, /usr/bin/ganesha.nfsd
29
31 SELinux defines process types (domains) for each process running on the
32 system
33 You can see the context of a process using the -Z option to ps
35 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 The following process types are defined for nfsd:
41 nfsd_t
43 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.
48
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.
54 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
59 default.
60 setsebool -P nfs_export_all_ro 1
62 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
67 default.
68 setsebool -P nfs_export_all_rw 1
70 If you want to allow users to resolve user passwd entries directly from
74 ldap rather then using a sssd server, you must turn on the authlo‐
75 gin_nsswitch_use_ldap boolean. Disabled by default.
76 setsebool -P authlogin_nsswitch_use_ldap 1
78 If you want to allow all domains to execute in fips_mode, you must turn
82 on the fips_mode boolean. Enabled by default.
83 setsebool -P fips_mode 1
85 If you want to allow confined applications to run with kerberos, you
89 must turn on the kerberos_enabled boolean. Enabled by default.
90 setsebool -P kerberos_enabled 1
92 If you want to allow system to run with NIS, you must turn on the
96 nis_enabled boolean. Disabled by default.
97 setsebool -P nis_enabled 1
99 If you want to allow confined applications to use nscd shared memory,
103 you must turn on the nscd_use_shm boolean. Disabled by default.
104 setsebool -P nscd_use_shm 1
106
110 SELinux defines port types to represent TCP and UDP ports.
111 You can see the types associated with a port by using the following
113 command:
114 semanage port -l
116 Policy governs the access confined processes have to these ports.
119 SELinux nfsd policy is very flexible allowing users to setup their nfsd
120 processes in as secure a method as possible.
121 The following port types are defined for nfsd:
123 nfs_port_t
126 Default Defined Ports:
130 tcp 2049,20048-20049
131 udp 2049,20048-20049
132
134 The SELinux process type nfsd_t can manage files labeled with the fol‐
135 lowing file types. The paths listed are the default paths for these
136 file types. Note the processes UID still need to have DAC permissions.
137 cluster_conf_t
139 /etc/cluster(/.*)?
141 cluster_var_lib_t
143 /var/lib/pcsd(/.*)?
145 /var/lib/cluster(/.*)?
146 /var/lib/openais(/.*)?
147 /var/lib/pengine(/.*)?
148 /var/lib/corosync(/.*)?
149 /usr/lib/heartbeat(/.*)?
150 /var/lib/heartbeat(/.*)?
151 /var/lib/pacemaker(/.*)?
152 cluster_var_run_t
154 /var/run/crm(/.*)?
156 /var/run/cman_.*
157 /var/run/rsctmp(/.*)?
158 /var/run/aisexec.*
159 /var/run/heartbeat(/.*)?
160 /var/run/corosync-qnetd(/.*)?
161 /var/run/corosync-qdevice(/.*)?
162 /var/run/corosync.pid
163 /var/run/cpglockd.pid
164 /var/run/rgmanager.pid
165 /var/run/cluster/rgmanager.sk
166 fsadm_var_run_t
168 /var/run/blkid(/.*)?
170 glusterd_log_t
172 /var/log/ganesha.log
174 /var/log/ganesha(/.*)?
175 /var/log/glusterfs(/.*)?
176 /var/log/ganesha-gfapi.log
177 glusterd_var_run_t
179 /var/run/gluster(/.*)?
181 /var/run/glusterd.*
182 /var/run/glusterd.*
183 /var/run/glusterd(/.*)?
184 mount_var_run_t
186 /run/mount(/.*)?
188 /dev/.mount(/.*)?
189 /var/run/mount(/.*)?
190 /var/run/davfs2(/.*)?
191 /var/cache/davfs2(/.*)?
192 nfsd_fs_t
194 nfsd_tmp_t
197 nfsd_unit_file_t
200 /usr/lib/systemd/system/nfs.*
202 /usr/lib/systemd/system/nfs-ganesha.*e
203 /usr/lib/systemd/system/nfs-ganesha-lock.*
204 /usr/lib/systemd/system/nfs-ganesha-config.*
205 public_content_rw_t
207 /var/spool/abrt-upload(/.*)?
209 root_t
211 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
213 /
214 /initrd
215 rpcd_var_run_t
217 /var/run/ganesha.*
219 /var/run/sm-notify.*
220 /var/run/rpc.statd(/.*)?
221 /var/run/rpc.statd.pid
222 var_lib_nfs_t
224 /var/lib/nfs(/.*)?
226 var_lib_t
228 /opt/(.*/)?var/lib(/.*)?
230 /var/lib(/.*)?
231
234 SELinux requires files to have an extended attribute to define the file
235 type.
236 You can see the context of a file using the -Z option to ls
238 Policy governs the access confined processes have to these files.
240 SELinux nfsd policy is very flexible allowing users to setup their nfsd
241 processes in as secure a method as possible.
242 STANDARD FILE CONTEXT
244 SELinux defines the file context types for the nfsd, if you wanted to
246 store files with these types in a diffent paths, you need to execute
247 the semanage command to sepecify alternate labeling and then use
248 restorecon to put the labels on disk.
249 semanage fcontext -a -t nfsd_tmp_t '/srv/mynfsd_content(/.*)?'
251 restorecon -R -v /srv/mynfsd_content
252 Note: SELinux often uses regular expressions to specify labels that
254 match multiple files.
255 The following file types are defined for nfsd:
257 nfsd_exec_t
261 - Set files with the nfsd_exec_t type, if you want to transition an
263 executable to the nfsd_t domain.
264 Paths:
267 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
268 /usr/sbin/rpc.mountd, /usr/bin/ganesha.nfsd
269 nfsd_fs_t
272 - Set files with the nfsd_fs_t type, if you want to treat the files as
274 nfsd fs data.
275 nfsd_initrc_exec_t
279 - Set files with the nfsd_initrc_exec_t type, if you want to transition
281 an executable to the nfsd_initrc_t domain.
282 nfsd_tmp_t
286 - Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
288 rary files in the /tmp directories.
289 nfsd_unit_file_t
293 - Set files with the nfsd_unit_file_t type, if you want to treat the
295 files as nfsd unit content.
296 Paths:
299 /usr/lib/systemd/system/nfs.*, /usr/lib/systemd/system/nfs-gane‐
300 sha.*e, /usr/lib/systemd/system/nfs-ganesha-lock.*, /usr/lib/sys‐
301 temd/system/nfs-ganesha-config.*
302 Note: File context can be temporarily modified with the chcon command.
305 If you want to permanently change the file context you need to use the
306 semanage fcontext command. This will modify the SELinux labeling data‐
307 base. You will need to use restorecon to apply the labels.
308
311 If you want to share files with multiple domains (Apache, FTP, rsync,
312 Samba), you can set a file context of public_content_t and public_con‐
313 tent_rw_t. These context allow any of the above domains to read the
314 content. If you want a particular domain to write to the public_con‐
315 tent_rw_t domain, you must set the appropriate boolean.
316 Allow nfsd servers to read the /var/nfsd directory by adding the pub‐
318 lic_content_t file type to the directory and by restoring the file
319 type.
320 semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
322 restorecon -F -R -v /var/nfsd
323 Allow nfsd servers to read and write /var/nfsd/incoming by adding the
325 public_content_rw_t type to the directory and by restoring the file
326 type. You also need to turn on the nfsd_anon_write boolean.
327 semanage fcontext -a -t public_content_rw_t "/var/nfsd/incoming(/.*)?"
329 restorecon -F -R -v /var/nfsd/incoming
330 setsebool -P nfsd_anon_write 1
331 If you want to allow nfs servers to modify public files used for public
334 file transfer services. Files/Directories must be labeled public_con‐
335 tent_rw_t., you must turn on the nfsd_anon_write boolean.
336 setsebool -P nfsd_anon_write 1
338
341 semanage fcontext can also be used to manipulate default file context
342 mappings.
343 semanage permissive can also be used to manipulate whether or not a
345 process type is permissive.
346 semanage module can also be used to enable/disable/install/remove pol‐
348 icy modules.
349 semanage port can also be used to manipulate the port definitions
351 semanage boolean can also be used to manipulate the booleans
353 system-config-selinux is a GUI tool available to customize SELinux pol‐
356 icy settings.
357
360 This manual page was auto-generated using sepolicy manpage .
361
364 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
365 setsebool(8)
366nfsd 19-05-30 nfsd_selinux(8)