1tftpd_selinux(8)             SELinux Policy tftpd             tftpd_selinux(8)
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NAME

6       tftpd_selinux - Security Enhanced Linux Policy for the tftpd processes
7

DESCRIPTION

9       Security-Enhanced Linux secures the tftpd processes via flexible manda‐
10       tory access control.
11
12       The tftpd processes execute with the  tftpd_t  SELinux  type.  You  can
13       check  if  you have these processes running by executing the ps command
14       with the -Z qualifier.
15
16       For example:
17
18       ps -eZ | grep tftpd_t
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20
21

ENTRYPOINTS

23       The tftpd_t SELinux type can be entered via the tftpd_exec_t file type.
24
25       The default entrypoint paths for the tftpd_t domain are the following:
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27       /usr/sbin/atftpd, /usr/sbin/in.tftpd
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PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
32
33       You can see the context of a process using the -Z option to ps
34
35       Policy  governs  the  access confined processes have to files.  SELinux
36       tftpd policy is very flexible allowing users to setup their tftpd  pro‐
37       cesses in as secure a method as possible.
38
39       The following process types are defined for tftpd:
40
41       tftpd_t
42
43       Note:  semanage  permissive  -a tftpd_t can be used to make the process
44       type tftpd_t permissive. SELinux does not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
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48

BOOLEANS

50       SELinux policy is customizable based on least access  required.   tftpd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run tftpd with the tightest access possible.
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54
55
56       If you want to allow tftp to read and write  files  in  the  user  home
57       directories,  you  must  turn on the tftp_home_dir boolean. Disabled by
58       default.
59
60       setsebool -P tftp_home_dir 1
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62
63
64       If you want to allow users to resolve user passwd entries directly from
65       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
66       gin_nsswitch_use_ldap boolean. Disabled by default.
67
68       setsebool -P authlogin_nsswitch_use_ldap 1
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70
71
72       If you want to allow all domains to execute in fips_mode, you must turn
73       on the fips_mode boolean. Enabled by default.
74
75       setsebool -P fips_mode 1
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77
78
79       If  you  want  to allow confined applications to run with kerberos, you
80       must turn on the kerberos_enabled boolean. Enabled by default.
81
82       setsebool -P kerberos_enabled 1
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84
85
86       If you want to allow system to run with  NIS,  you  must  turn  on  the
87       nis_enabled boolean. Disabled by default.
88
89       setsebool -P nis_enabled 1
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91
92
93       If  you  want to allow confined applications to use nscd shared memory,
94       you must turn on the nscd_use_shm boolean. Disabled by default.
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96       setsebool -P nscd_use_shm 1
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98
99

PORT TYPES

101       SELinux defines port types to represent TCP and UDP ports.
102
103       You can see the types associated with a port  by  using  the  following
104       command:
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106       semanage port -l
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108
109       Policy  governs  the  access  confined  processes  have to these ports.
110       SELinux tftpd policy is very flexible allowing  users  to  setup  their
111       tftpd processes in as secure a method as possible.
112
113       The following port types are defined for tftpd:
114
115
116       tftp_port_t
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118
119
120       Default Defined Ports:
121                 udp 69
122

MANAGED FILES

124       The SELinux process type tftpd_t can manage files labeled with the fol‐
125       lowing file types.  The paths listed are the default  paths  for  these
126       file types.  Note the processes UID still need to have DAC permissions.
127
128       cifs_t
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130
131       cluster_conf_t
132
133            /etc/cluster(/.*)?
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135       cluster_var_lib_t
136
137            /var/lib/pcsd(/.*)?
138            /var/lib/cluster(/.*)?
139            /var/lib/openais(/.*)?
140            /var/lib/pengine(/.*)?
141            /var/lib/corosync(/.*)?
142            /usr/lib/heartbeat(/.*)?
143            /var/lib/heartbeat(/.*)?
144            /var/lib/pacemaker(/.*)?
145
146       cluster_var_run_t
147
148            /var/run/crm(/.*)?
149            /var/run/cman_.*
150            /var/run/rsctmp(/.*)?
151            /var/run/aisexec.*
152            /var/run/heartbeat(/.*)?
153            /var/run/corosync-qnetd(/.*)?
154            /var/run/corosync-qdevice(/.*)?
155            /var/run/corosync.pid
156            /var/run/cpglockd.pid
157            /var/run/rgmanager.pid
158            /var/run/cluster/rgmanager.sk
159
160       ecryptfs_t
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162            /home/[^/]+/.Private(/.*)?
163            /home/[^/]+/.ecryptfs(/.*)?
164
165       fusefs_t
166
167            /var/run/user/[^/]*/gvfs
168
169       nfs_t
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171
172       public_content_rw_t
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174            /var/spool/abrt-upload(/.*)?
175
176       root_t
177
178            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
179            /
180            /initrd
181
182       tftpd_var_run_t
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184
185       tftpdir_rw_t
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187            /var/lib/tftpboot(/.*)?
188
189       user_home_type
190
191            all user home files
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193

FILE CONTEXTS

195       SELinux requires files to have an extended attribute to define the file
196       type.
197
198       You can see the context of a file using the -Z option to ls
199
200       Policy governs the access  confined  processes  have  to  these  files.
201       SELinux  tftpd  policy  is  very flexible allowing users to setup their
202       tftpd processes in as secure a method as possible.
203
204       STANDARD FILE CONTEXT
205
206       SELinux defines the file context types for the tftpd, if you wanted  to
207       store  files  with  these types in a diffent paths, you need to execute
208       the semanage command  to  sepecify  alternate  labeling  and  then  use
209       restorecon to put the labels on disk.
210
211       semanage fcontext -a -t tftpd_etc_t '/srv/mytftpd_content(/.*)?'
212       restorecon -R -v /srv/mytftpd_content
213
214       Note:  SELinux  often  uses  regular expressions to specify labels that
215       match multiple files.
216
217       The following file types are defined for tftpd:
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219
220
221       tftpd_etc_t
222
223       - Set files with the tftpd_etc_t type, if you want to store tftpd files
224       in the /etc directories.
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226
227
228       tftpd_exec_t
229
230       -  Set  files  with the tftpd_exec_t type, if you want to transition an
231       executable to the tftpd_t domain.
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233
234       Paths:
235            /usr/sbin/atftpd, /usr/sbin/in.tftpd
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237
238       tftpd_var_run_t
239
240       - Set files with the tftpd_var_run_t type, if you  want  to  store  the
241       tftpd files under the /run or /var/run directory.
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243
244
245       tftpdir_rw_t
246
247       -  Set files with the tftpdir_rw_t type, if you want to treat the files
248       as tftpdir read/write content.
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250
251
252       tftpdir_t
253
254       - Set files with the tftpdir_t type, if you want to treat the files  as
255       tftpdir data.
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257
258       Paths:
259            /tftpboot/.*, /tftpboot
260
261
262       Note:  File context can be temporarily modified with the chcon command.
263       If you want to permanently change the file context you need to use  the
264       semanage fcontext command.  This will modify the SELinux labeling data‐
265       base.  You will need to use restorecon to apply the labels.
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267

SHARING FILES

269       If you want to share files with multiple domains (Apache,  FTP,  rsync,
270       Samba),  you can set a file context of public_content_t and public_con‐
271       tent_rw_t.  These context allow any of the above domains  to  read  the
272       content.   If  you want a particular domain to write to the public_con‐
273       tent_rw_t domain, you must set the appropriate boolean.
274
275       Allow tftpd servers to read the /var/tftpd directory by adding the pub‐
276       lic_content_t  file  type  to  the  directory and by restoring the file
277       type.
278
279       semanage fcontext -a -t public_content_t "/var/tftpd(/.*)?"
280       restorecon -F -R -v /var/tftpd
281
282       Allow tftpd servers to read and write /var/tftpd/incoming by adding the
283       public_content_rw_t  type  to  the  directory and by restoring the file
284       type.  You also need to turn on the tftpd_anon_write boolean.
285
286       semanage fcontext -a -t public_content_rw_t "/var/tftpd/incoming(/.*)?"
287       restorecon -F -R -v /var/tftpd/incoming
288       setsebool -P tftpd_anon_write 1
289
290
291       If you want to allow tftp to modify public files used for  public  file
292       transfer services., you must turn on the tftp_anon_write boolean.
293
294       setsebool -P tftp_anon_write 1
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296

COMMANDS

298       semanage  fcontext  can also be used to manipulate default file context
299       mappings.
300
301       semanage permissive can also be used to manipulate  whether  or  not  a
302       process type is permissive.
303
304       semanage  module can also be used to enable/disable/install/remove pol‐
305       icy modules.
306
307       semanage port can also be used to manipulate the port definitions
308
309       semanage boolean can also be used to manipulate the booleans
310
311
312       system-config-selinux is a GUI tool available to customize SELinux pol‐
313       icy settings.
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315

AUTHOR

317       This manual page was auto-generated using sepolicy manpage .
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319

SEE ALSO

321       selinux(8),  tftpd(8),  semanage(8),  restorecon(8),  chcon(1),  sepol‐
322       icy(8), setsebool(8)
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326tftpd                              19-06-18                   tftpd_selinux(8)
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