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 all domains to execute in fips_mode, you must turn
74 on the fips_mode boolean. Enabled by default.
75 setsebool -P fips_mode 1
77
81 SELinux defines port types to represent TCP and UDP ports.
82 You can see the types associated with a port by using the following
84 command:
85 semanage port -l
87 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.
92 The following port types are defined for nfsd:
94 nfs_port_t
97 Default Defined Ports:
101 tcp 2049,20048-20049
102 udp 2049,20048-20049
103
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.
108 cluster_conf_t
110 /etc/cluster(/.*)?
112 cluster_var_lib_t
114 /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(/.*)?
123 cluster_var_run_t
125 /var/run/crm(/.*)?
127 /var/run/cman_.*
128 /var/run/rsctmp(/.*)?
129 /var/run/aisexec.*
130 /var/run/heartbeat(/.*)?
131 /var/run/corosync-qnetd(/.*)?
132 /var/run/corosync-qdevice(/.*)?
133 /var/run/corosync.pid
134 /var/run/cpglockd.pid
135 /var/run/rgmanager.pid
136 /var/run/cluster/rgmanager.sk
137 fsadm_var_run_t
139 /var/run/blkid(/.*)?
141 glusterd_log_t
143 /var/log/glusterfs(/.*)?
145 glusterd_var_run_t
147 /var/run/gluster(/.*)?
149 /var/run/glusterd.*
150 /var/run/glusterd.*
151 /var/run/glusterd(/.*)?
152 mount_var_run_t
154 /run/mount(/.*)?
156 /dev/.mount(/.*)?
157 /var/run/mount(/.*)?
158 /var/run/davfs2(/.*)?
159 /var/cache/davfs2(/.*)?
160 nfsd_fs_t
162 nfsd_unit_file_t
165 /usr/lib/systemd/system/nfs.*
167 root_t
169 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
171 /
172 /initrd
173 rpcd_var_run_t
175 /var/run/sm-notify.*
177 /var/run/rpc.statd(/.*)?
178 /var/run/rpc.statd.pid
179 var_lib_nfs_t
181 /var/lib/nfs(/.*)?
183 var_lib_t
185 /opt/(.*/)?var/lib(/.*)?
187 /var/lib(/.*)?
188
191 SELinux requires files to have an extended attribute to define the file
192 type.
193 You can see the context of a file using the -Z option to ls
195 Policy governs the access confined processes have to these files.
197 SELinux nfsd policy is very flexible allowing users to setup their nfsd
198 processes in as secure a method as possible.
199 STANDARD FILE CONTEXT
201 SELinux defines the file context types for the nfsd, if you wanted to
203 store files with these types in a diffent paths, you need to execute
204 the semanage command to sepecify alternate labeling and then use
205 restorecon to put the labels on disk.
206 semanage fcontext -a -t nfsd_tmp_t '/srv/mynfsd_content(/.*)?'
208 restorecon -R -v /srv/mynfsd_content
209 Note: SELinux often uses regular expressions to specify labels that
211 match multiple files.
212 The following file types are defined for nfsd:
214 nfsd_exec_t
218 - Set files with the nfsd_exec_t type, if you want to transition an
220 executable to the nfsd_t domain.
221 Paths:
224 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
225 /usr/sbin/rpc.mountd
226 nfsd_fs_t
229 - Set files with the nfsd_fs_t type, if you want to treat the files as
231 nfsd fs data.
232 nfsd_initrc_exec_t
236 - Set files with the nfsd_initrc_exec_t type, if you want to transition
238 an executable to the nfsd_initrc_t domain.
239 nfsd_tmp_t
243 - Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
245 rary files in the /tmp directories.
246 nfsd_unit_file_t
250 - Set files with the nfsd_unit_file_t type, if you want to treat the
252 files as nfsd unit content.
253 Note: File context can be temporarily modified with the chcon command.
257 If you want to permanently change the file context you need to use the
258 semanage fcontext command. This will modify the SELinux labeling data‐
259 base. You will need to use restorecon to apply the labels.
260
263 If you want to share files with multiple domains (Apache, FTP, rsync,
264 Samba), you can set a file context of public_content_t and public_con‐
265 tent_rw_t. These context allow any of the above domains to read the
266 content. If you want a particular domain to write to the public_con‐
267 tent_rw_t domain, you must set the appropriate boolean.
268 Allow nfsd servers to read the /var/nfsd directory by adding the pub‐
270 lic_content_t file type to the directory and by restoring the file
271 type.
272 semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
274 restorecon -F -R -v /var/nfsd
275 Allow nfsd servers to read and write /var/nfsd/incoming by adding the
277 public_content_rw_t type to the directory and by restoring the file
278 type. You also need to turn on the nfsd_anon_write boolean.
279 semanage fcontext -a -t public_content_rw_t "/var/nfsd/incoming(/.*)?"
281 restorecon -F -R -v /var/nfsd/incoming
282 setsebool -P nfsd_anon_write 1
283 If you want to allow nfs servers to modify public files used for public
286 file transfer services. Files/Directories must be labeled public_con‐
287 tent_rw_t., you must turn on the nfsd_anon_write boolean.
288 setsebool -P nfsd_anon_write 1
290
293 semanage fcontext can also be used to manipulate default file context
294 mappings.
295 semanage permissive can also be used to manipulate whether or not a
297 process type is permissive.
298 semanage module can also be used to enable/disable/install/remove pol‐
300 icy modules.
301 semanage port can also be used to manipulate the port definitions
303 semanage boolean can also be used to manipulate the booleans
305 system-config-selinux is a GUI tool available to customize SELinux pol‐
308 icy settings.
309
312 This manual page was auto-generated using sepolicy manpage .
313
316 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
317 setsebool(8)
318nfsd 21-03-26 nfsd_selinux(8)