1nfsd_selinux(8) SELinux Policy nfsd nfsd_selinux(8)
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6 nfsd_selinux - Security Enhanced Linux Policy for the nfsd processes
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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 de‐
59 fault.
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 de‐
67 fault.
68 setsebool -P nfs_export_all_rw 1
70 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 setsebool -P daemons_dontaudit_scheduling 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 system to run with NIS, you must turn on the
89 nis_enabled boolean. Disabled by default.
90 setsebool -P nis_enabled 1
92
96 SELinux defines port types to represent TCP and UDP ports.
97 You can see the types associated with a port by using the following
99 command:
100 semanage port -l
102 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.
107 The following port types are defined for nfsd:
109 nfs_port_t
112 Default Defined Ports:
116 tcp 2049,20048-20049
117 udp 2049,20048-20049
118
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.
123 cluster_conf_t
125 /etc/cluster(/.*)?
127 cluster_var_lib_t
129 /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(/.*)?
138 cluster_var_run_t
140 /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
153 fsadm_var_run_t
155 /var/run/fsck(/.*)?
157 /var/run/blkid(/.*)?
158 glusterd_log_t
160 /var/log/glusterfs(/.*)?
162 glusterd_var_run_t
164 /var/run/gluster(/.*)?
166 /var/run/glusterd.*
167 /var/run/glusterd.*
168 /var/run/glusterd(/.*)?
169 krb5_host_rcache_t
171 /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 mount_var_run_t
185 /run/mount(/.*)?
187 /dev/.mount(/.*)?
188 /var/run/mount(/.*)?
189 /var/run/davfs2(/.*)?
190 /var/cache/davfs2(/.*)?
191 nfsd_fs_t
193 nfsd_tmp_t
196 nfsd_unit_file_t
199 /usr/lib/systemd/system/nfs.*
201 root_t
203 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
205 /
206 /initrd
207 rpcd_var_run_t
209 /var/run/sm-notify.*
211 /var/run/rpc.statd(/.*)?
212 /var/run/rpc.statd.pid
213 var_lib_nfs_t
215 /var/lib/nfs(/.*)?
217 var_lib_t
219 /opt/(.*/)?var/lib(/.*)?
221 /var/lib(/.*)?
222
225 SELinux requires files to have an extended attribute to define the file
226 type.
227 You can see the context of a file using the -Z option to ls
229 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 STANDARD FILE CONTEXT
235 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.
240 semanage fcontext -a -t nfsd_fs_t '/srv/nfsd/content(/.*)?'
242 restorecon -R -v /srv/mynfsd_content
243 Note: SELinux often uses regular expressions to specify labels that
245 match multiple files.
246 The following file types are defined for nfsd:
248 nfsd_exec_t
252 - Set files with the nfsd_exec_t type, if you want to transition an ex‐
254 ecutable to the nfsd_t domain.
255 Paths:
258 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
259 /usr/sbin/rpc.mountd
260 nfsd_fs_t
263 - Set files with the nfsd_fs_t type, if you want to treat the files as
265 nfsd fs data.
266 nfsd_initrc_exec_t
270 - Set files with the nfsd_initrc_exec_t type, if you want to transition
272 an executable to the nfsd_initrc_t domain.
273 nfsd_tmp_t
277 - Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
279 rary files in the /tmp directories.
280 nfsd_unit_file_t
284 - Set files with the nfsd_unit_file_t type, if you want to treat the
286 files as nfsd unit content.
287 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.
294
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 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 semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
308 restorecon -F -R -v /var/nfsd
309 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.
313 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
317 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 setsebool -P nfsd_anon_write 1
324
327 semanage fcontext can also be used to manipulate default file context
328 mappings.
329 semanage permissive can also be used to manipulate whether or not a
331 process type is permissive.
332 semanage module can also be used to enable/disable/install/remove pol‐
334 icy modules.
335 semanage port can also be used to manipulate the port definitions
337 semanage boolean can also be used to manipulate the booleans
339 system-config-selinux is a GUI tool available to customize SELinux pol‐
342 icy settings.
343
346 This manual page was auto-generated using sepolicy manpage .
347
350 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
351 setsebool(8)
352nfsd 23-10-20 nfsd_selinux(8)