1nfsd_selinux(8) SELinux Policy nfsd nfsd_selinux(8)
2
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
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. Disabled 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/glusterfs(/.*)?
174 glusterd_var_run_t
176 /var/run/gluster(/.*)?
178 /var/run/glusterd.*
179 /var/run/glusterd.*
180 /var/run/glusterd(/.*)?
181 mount_var_run_t
183 /run/mount(/.*)?
185 /dev/.mount(/.*)?
186 /var/run/mount(/.*)?
187 /var/run/davfs2(/.*)?
188 /var/cache/davfs2(/.*)?
189 nfsd_fs_t
191 nfsd_tmp_t
194 nfsd_unit_file_t
197 /usr/lib/systemd/system/nfs.*
199 public_content_rw_t
201 /var/spool/abrt-upload(/.*)?
203 root_t
205 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
207 /
208 /initrd
209 rpcd_var_run_t
211 /var/run/sm-notify.*
213 /var/run/rpc.statd(/.*)?
214 /var/run/rpc.statd.pid
215 var_lib_nfs_t
217 /var/lib/nfs(/.*)?
219 var_lib_t
221 /opt/(.*/)?var/lib(/.*)?
223 /var/lib(/.*)?
224
227 SELinux requires files to have an extended attribute to define the file
228 type.
229 You can see the context of a file using the -Z option to ls
231 Policy governs the access confined processes have to these files.
233 SELinux nfsd policy is very flexible allowing users to setup their nfsd
234 processes in as secure a method as possible.
235 STANDARD FILE CONTEXT
237 SELinux defines the file context types for the nfsd, if you wanted to
239 store files with these types in a diffent paths, you need to execute
240 the semanage command to sepecify alternate labeling and then use
241 restorecon to put the labels on disk.
242 semanage fcontext -a -t nfsd_tmp_t '/srv/mynfsd_content(/.*)?'
244 restorecon -R -v /srv/mynfsd_content
245 Note: SELinux often uses regular expressions to specify labels that
247 match multiple files.
248 The following file types are defined for nfsd:
250 nfsd_exec_t
254 - Set files with the nfsd_exec_t type, if you want to transition an
256 executable to the nfsd_t domain.
257 Paths:
260 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
261 /usr/sbin/rpc.mountd
262 nfsd_fs_t
265 - Set files with the nfsd_fs_t type, if you want to treat the files as
267 nfsd fs data.
268 nfsd_initrc_exec_t
272 - Set files with the nfsd_initrc_exec_t type, if you want to transition
274 an executable to the nfsd_initrc_t domain.
275 nfsd_tmp_t
279 - Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
281 rary files in the /tmp directories.
282 nfsd_unit_file_t
286 - Set files with the nfsd_unit_file_t type, if you want to treat the
288 files as nfsd unit content.
289 Note: File context can be temporarily modified with the chcon command.
293 If you want to permanently change the file context you need to use the
294 semanage fcontext command. This will modify the SELinux labeling data‐
295 base. You will need to use restorecon to apply the labels.
296
299 If you want to share files with multiple domains (Apache, FTP, rsync,
300 Samba), you can set a file context of public_content_t and public_con‐
301 tent_rw_t. These context allow any of the above domains to read the
302 content. If you want a particular domain to write to the public_con‐
303 tent_rw_t domain, you must set the appropriate boolean.
304 Allow nfsd servers to read the /var/nfsd directory by adding the pub‐
306 lic_content_t file type to the directory and by restoring the file
307 type.
308 semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
310 restorecon -F -R -v /var/nfsd
311 Allow nfsd servers to read and write /var/nfsd/incoming by adding the
313 public_content_rw_t type to the directory and by restoring the file
314 type. You also need to turn on the nfsd_anon_write boolean.
315 semanage fcontext -a -t public_content_rw_t "/var/nfsd/incoming(/.*)?"
317 restorecon -F -R -v /var/nfsd/incoming
318 setsebool -P nfsd_anon_write 1
319 If you want to allow nfs servers to modify public files used for public
322 file transfer services. Files/Directories must be labeled public_con‐
323 tent_rw_t., you must turn on the nfsd_anon_write boolean.
324 setsebool -P nfsd_anon_write 1
326
329 semanage fcontext can also be used to manipulate default file context
330 mappings.
331 semanage permissive can also be used to manipulate whether or not a
333 process type is permissive.
334 semanage module can also be used to enable/disable/install/remove pol‐
336 icy modules.
337 semanage port can also be used to manipulate the port definitions
339 semanage boolean can also be used to manipulate the booleans
341 system-config-selinux is a GUI tool available to customize SELinux pol‐
344 icy settings.
345
348 This manual page was auto-generated using sepolicy manpage .
349
352 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
353 setsebool(8)
354nfsd 19-12-02 nfsd_selinux(8)