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/sbin/rpc.nfsd, /usr/sbin/rpc.mountd
28
30 SELinux defines process types (domains) for each process running on the
31 system
32 You can see the context of a process using the -Z option to ps
34 Policy governs the access confined processes have to files. SELinux
36 nfsd policy is very flexible allowing users to setup their nfsd pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for nfsd:
40 nfsd_t
42 Note: semanage permissive -a nfsd_t can be used to make the process
44 type nfsd_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
47
50 SELinux policy is customizable based on least access required. nfsd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run nfsd with the tightest access possible.
53 If you want to allow all daemons to write corefiles to /, you must turn
57 on the allow_daemons_dump_core boolean. Disabled by default.
58 setsebool -P allow_daemons_dump_core 1
60 If you want to allow all daemons to use tcp wrappers, you must turn on
64 the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
65 setsebool -P allow_daemons_use_tcp_wrapper 1
67 If you want to allow all daemons the ability to read/write terminals,
71 you must turn on the allow_daemons_use_tty boolean. Disabled by
72 default.
73 setsebool -P allow_daemons_use_tty 1
75 If you want to allow all domains to use other domains file descriptors,
79 you must turn on the allow_domain_fd_use boolean. Enabled by default.
80 setsebool -P allow_domain_fd_use 1
82 If you want to allow confined applications to run with kerberos, you
86 must turn on the allow_kerberos boolean. Enabled by default.
87 setsebool -P allow_kerberos 1
89 If you want to allow sysadm to debug or ptrace all processes, you must
93 turn on the allow_ptrace boolean. Disabled by default.
94 setsebool -P allow_ptrace 1
96 If you want to allow system to run with NIS, you must turn on the
100 allow_ypbind boolean. Disabled by default.
101 setsebool -P allow_ypbind 1
103 If you want to enable cluster mode for daemons, you must turn on the
107 daemons_enable_cluster_mode boolean. Disabled by default.
108 setsebool -P daemons_enable_cluster_mode 1
110 If you want to allow all domains to have the kernel load modules, you
114 must turn on the domain_kernel_load_modules boolean. Disabled by
115 default.
116 setsebool -P domain_kernel_load_modules 1
118 If you want to allow all domains to execute in fips_mode, you must turn
122 on the fips_mode boolean. Enabled by default.
123 setsebool -P fips_mode 1
125 If you want to enable reading of urandom for all domains, you must turn
129 on the global_ssp boolean. Disabled by default.
130 setsebool -P global_ssp 1
132 If you want to enable support for upstart as the init program, you must
136 turn on the init_upstart boolean. Enabled by default.
137 setsebool -P init_upstart 1
139 If you want to allow confined applications to use nscd shared memory,
143 you must turn on the nscd_use_shm boolean. Enabled by default.
144 setsebool -P nscd_use_shm 1
146
150 SELinux defines port types to represent TCP and UDP ports.
151 You can see the types associated with a port by using the following
153 command:
154 semanage port -l
156 Policy governs the access confined processes have to these ports.
159 SELinux nfsd policy is very flexible allowing users to setup their nfsd
160 processes in as secure a method as possible.
161 The following port types are defined for nfsd:
163 nfs_port_t
166 Default Defined Ports:
170 tcp 2049,20048-20049
171 udp 2049,20048-20049
172
174 The SELinux process type nfsd_t can manage files labeled with the fol‐
175 lowing file types. The paths listed are the default paths for these
176 file types. Note the processes UID still need to have DAC permissions.
177 cluster_conf_t
179 /etc/cluster(/.*)?
181 cluster_var_lib_t
183 /var/lib(64)?/openais(/.*)?
185 /var/lib(64)?/pengine(/.*)?
186 /var/lib(64)?/corosync(/.*)?
187 /usr/lib(64)?/heartbeat(/.*)?
188 /var/lib(64)?/heartbeat(/.*)?
189 /var/lib(64)?/pacemaker(/.*)?
190 /var/lib/cluster(/.*)?
191 cluster_var_run_t
193 /var/run/crm(/.*)?
195 /var/run/cman_.*
196 /var/run/rsctmp(/.*)?
197 /var/run/aisexec.*
198 /var/run/heartbeat(/.*)?
199 /var/run/cpglockd.pid
200 /var/run/corosync.pid
201 /var/run/rgmanager.pid
202 /var/run/cluster/rgmanager.sk
203 initrc_tmp_t
205 mnt_t
208 /mnt(/[^/]*)
210 /mnt(/[^/]*)?
211 /rhev(/[^/]*)?
212 /media(/[^/]*)
213 /media(/[^/]*)?
214 /etc/rhgb(/.*)?
215 /media/.hal-.*
216 /net
217 /afs
218 /rhev
219 /misc
220 nfsd_fs_t
222 root_t
225 /
227 /initrd
228 tmp_t
230 /tmp
232 /usr/tmp
233 /var/tmp
234 /tmp-inst
235 /var/tmp-inst
236 /var/tmp/vi.recover
237 var_lib_nfs_t
239 /var/lib/nfs(/.*)?
241 var_lib_t
243 /opt/(.*/)?var/lib(64)?(/.*)?
245 /var/lib(/.*)?
246
249 SELinux requires files to have an extended attribute to define the file
250 type.
251 You can see the context of a file using the -Z option to ls
253 Policy governs the access confined processes have to these files.
255 SELinux nfsd policy is very flexible allowing users to setup their nfsd
256 processes in as secure a method as possible.
257 STANDARD FILE CONTEXT
259 SELinux defines the file context types for the nfsd, if you wanted to
261 store files with these types in a diffent paths, you need to execute
262 the semanage command to sepecify alternate labeling and then use
263 restorecon to put the labels on disk.
264 semanage fcontext -a -t nfsd_rw_t '/srv/mynfsd_content(/.*)?'
266 restorecon -R -v /srv/mynfsd_content
267 Note: SELinux often uses regular expressions to specify labels that
269 match multiple files.
270 The following file types are defined for nfsd:
272 nfsd_exec_t
276 - Set files with the nfsd_exec_t type, if you want to transition an
278 executable to the nfsd_t domain.
279 Paths:
282 /usr/sbin/rpc.nfsd, /usr/sbin/rpc.mountd
283 nfsd_initrc_exec_t
286 - Set files with the nfsd_initrc_exec_t type, if you want to transition
288 an executable to the nfsd_initrc_t domain.
289 nfsd_ro_t
293 - Set files with the nfsd_ro_t type, if you want to treat the files as
295 nfsd read/only content.
296 nfsd_rw_t
300 - Set files with the nfsd_rw_t type, if you want to treat the files as
302 nfsd read/write content.
303 Note: File context can be temporarily modified with the chcon command.
307 If you want to permanently change the file context you need to use the
308 semanage fcontext command. This will modify the SELinux labeling data‐
309 base. You will need to use restorecon to apply the labels.
310
313 semanage fcontext can also be used to manipulate default file context
314 mappings.
315 semanage permissive can also be used to manipulate whether or not a
317 process type is permissive.
318 semanage module can also be used to enable/disable/install/remove pol‐
320 icy modules.
321 semanage port can also be used to manipulate the port definitions
323 semanage boolean can also be used to manipulate the booleans
325 system-config-selinux is a GUI tool available to customize SELinux pol‐
328 icy settings.
329
332 This manual page was auto-generated using sepolicy manpage .
333
336 selinux(8), nfsd(8), semanage(8), restorecon(8), chcon(1) , setse‐
337 bool(8)
338nfsd 15-06-03 nfsd_selinux(8)