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
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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 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/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 fsadm_var_run_t
140 /var/run/fsck(/.*)?
142 /var/run/blkid(/.*)?
143 glusterd_log_t
145 /var/log/glusterfs(/.*)?
147 glusterd_var_run_t
149 /var/run/gluster(/.*)?
151 /var/run/glusterd.*
152 /var/run/glusterd.*
153 /var/run/glusterd(/.*)?
154 krb5_host_rcache_t
156 /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 mount_var_run_t
170 /run/mount(/.*)?
172 /dev/.mount(/.*)?
173 /var/run/mount(/.*)?
174 /var/run/davfs2(/.*)?
175 /var/cache/davfs2(/.*)?
176 nfsd_fs_t
178 nfsd_tmp_t
181 nfsd_unit_file_t
184 /usr/lib/systemd/system/nfs.*
186 root_t
188 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
190 /
191 /initrd
192 rpcd_var_run_t
194 /var/run/sm-notify.*
196 /var/run/rpc.statd(/.*)?
197 /var/run/rpc.statd.pid
198 var_lib_nfs_t
200 /var/lib/nfs(/.*)?
202 var_lib_t
204 /opt/(.*/)?var/lib(/.*)?
206 /var/lib(/.*)?
207
210 SELinux requires files to have an extended attribute to define the file
211 type.
212 You can see the context of a file using the -Z option to ls
214 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.
218 STANDARD FILE CONTEXT
220 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 semanage fcontext -a -t nfsd_tmp_t '/srv/mynfsd_content(/.*)?'
227 restorecon -R -v /srv/mynfsd_content
228 Note: SELinux often uses regular expressions to specify labels that
230 match multiple files.
231 The following file types are defined for nfsd:
233 nfsd_exec_t
237 - Set files with the nfsd_exec_t type, if you want to transition an ex‐
239 ecutable to the nfsd_t domain.
240 Paths:
243 /usr/lib/systemd/system-generators/nfs.*, /usr/sbin/rpc.nfsd,
244 /usr/sbin/rpc.mountd
245 nfsd_fs_t
248 - Set files with the nfsd_fs_t type, if you want to treat the files as
250 nfsd fs data.
251 nfsd_initrc_exec_t
255 - Set files with the nfsd_initrc_exec_t type, if you want to transition
257 an executable to the nfsd_initrc_t domain.
258 nfsd_tmp_t
262 - Set files with the nfsd_tmp_t type, if you want to store nfsd tempo‐
264 rary files in the /tmp directories.
265 nfsd_unit_file_t
269 - Set files with the nfsd_unit_file_t type, if you want to treat the
271 files as nfsd unit content.
272 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.
279
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 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 semanage fcontext -a -t public_content_t "/var/nfsd(/.*)?"
293 restorecon -F -R -v /var/nfsd
294 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 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
302 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 setsebool -P nfsd_anon_write 1
309
312 semanage fcontext can also be used to manipulate default file context
313 mappings.
314 semanage permissive can also be used to manipulate whether or not a
316 process type is permissive.
317 semanage module can also be used to enable/disable/install/remove pol‐
319 icy modules.
320 semanage port can also be used to manipulate the port definitions
322 semanage boolean can also be used to manipulate the booleans
324 system-config-selinux is a GUI tool available to customize SELinux pol‐
327 icy settings.
328
331 This manual page was auto-generated using sepolicy manpage .
332
335 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
336 setsebool(8)
337nfsd 21-11-19 nfsd_selinux(8)