1tftpd_selinux(8) SELinux Policy tftpd tftpd_selinux(8)
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6 tftpd_selinux - Security Enhanced Linux Policy for the tftpd processes
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9 Security-Enhanced Linux secures the tftpd processes via flexible manda‐
10 tory access control.
11 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 For example:
17 ps -eZ | grep tftpd_t
19
23 The tftpd_t SELinux type can be entered via the tftpd_exec_t file type.
24 The default entrypoint paths for the tftpd_t domain are the following:
26 /usr/sbin/atftpd, /usr/sbin/in.tftpd
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 tftpd policy is very flexible allowing users to setup their tftpd pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for tftpd:
40 tftpd_t
42 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.
47
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.
53 If you want to allow tftp to read and write files in the user home di‐
57 rectories, you must turn on the tftp_home_dir boolean. Disabled by de‐
58 fault.
59 setsebool -P tftp_home_dir 1
61 If you want to allow all domains to execute in fips_mode, you must turn
65 on the fips_mode boolean. Enabled by default.
66 setsebool -P fips_mode 1
68
72 SELinux defines port types to represent TCP and UDP ports.
73 You can see the types associated with a port by using the following
75 command:
76 semanage port -l
78 Policy governs the access confined processes have to these ports.
81 SELinux tftpd policy is very flexible allowing users to setup their
82 tftpd processes in as secure a method as possible.
83 The following port types are defined for tftpd:
85 tftp_port_t
88 Default Defined Ports:
92 udp 69
93
95 The SELinux process type tftpd_t can manage files labeled with the fol‐
96 lowing file types. The paths listed are the default paths for these
97 file types. Note the processes UID still need to have DAC permissions.
98 cifs_t
100 cluster_conf_t
103 /etc/cluster(/.*)?
105 cluster_var_lib_t
107 /var/lib/pcsd(/.*)?
109 /var/lib/cluster(/.*)?
110 /var/lib/openais(/.*)?
111 /var/lib/pengine(/.*)?
112 /var/lib/corosync(/.*)?
113 /usr/lib/heartbeat(/.*)?
114 /var/lib/heartbeat(/.*)?
115 /var/lib/pacemaker(/.*)?
116 cluster_var_run_t
118 /var/run/crm(/.*)?
120 /var/run/cman_.*
121 /var/run/rsctmp(/.*)?
122 /var/run/aisexec.*
123 /var/run/heartbeat(/.*)?
124 /var/run/pcsd-ruby.socket
125 /var/run/corosync-qnetd(/.*)?
126 /var/run/corosync-qdevice(/.*)?
127 /var/run/corosync.pid
128 /var/run/cpglockd.pid
129 /var/run/rgmanager.pid
130 /var/run/cluster/rgmanager.sk
131 ecryptfs_t
133 /home/[^/]+/.Private(/.*)?
135 /home/[^/]+/.ecryptfs(/.*)?
136 fusefs_t
138 /var/run/user/[^/]*/gvfs
140 krb5_host_rcache_t
142 /var/tmp/krb5_0.rcache2
144 /var/cache/krb5rcache(/.*)?
145 /var/tmp/nfs_0
146 /var/tmp/DNS_25
147 /var/tmp/host_0
148 /var/tmp/imap_0
149 /var/tmp/HTTP_23
150 /var/tmp/HTTP_48
151 /var/tmp/ldap_55
152 /var/tmp/ldap_487
153 /var/tmp/ldapmap1_0
154 nfs_t
156 root_t
159 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
161 /
162 /initrd
163 tftpd_var_run_t
165 tftpdir_rw_t
168 /var/lib/tftpboot(/.*)?
170
173 SELinux requires files to have an extended attribute to define the file
174 type.
175 You can see the context of a file using the -Z option to ls
177 Policy governs the access confined processes have to these files.
179 SELinux tftpd policy is very flexible allowing users to setup their
180 tftpd processes in as secure a method as possible.
181 STANDARD FILE CONTEXT
183 SELinux defines the file context types for the tftpd, if you wanted to
185 store files with these types in a diffent paths, you need to execute
186 the semanage command to sepecify alternate labeling and then use re‐
187 storecon to put the labels on disk.
188 semanage fcontext -a -t tftpd_etc_t '/srv/mytftpd_content(/.*)?'
190 restorecon -R -v /srv/mytftpd_content
191 Note: SELinux often uses regular expressions to specify labels that
193 match multiple files.
194 The following file types are defined for tftpd:
196 tftpd_etc_t
200 - Set files with the tftpd_etc_t type, if you want to store tftpd files
202 in the /etc directories.
203 tftpd_exec_t
207 - Set files with the tftpd_exec_t type, if you want to transition an
209 executable to the tftpd_t domain.
210 Paths:
213 /usr/sbin/atftpd, /usr/sbin/in.tftpd
214 tftpd_var_run_t
217 - Set files with the tftpd_var_run_t type, if you want to store the
219 tftpd files under the /run or /var/run directory.
220 tftpdir_rw_t
224 - Set files with the tftpdir_rw_t type, if you want to treat the files
226 as tftpdir read/write content.
227 tftpdir_t
231 - Set files with the tftpdir_t type, if you want to treat the files as
233 tftpdir data.
234 Paths:
237 /tftpboot/.*, /tftpboot
238 Note: File context can be temporarily modified with the chcon command.
241 If you want to permanently change the file context you need to use the
242 semanage fcontext command. This will modify the SELinux labeling data‐
243 base. You will need to use restorecon to apply the labels.
244
247 If you want to share files with multiple domains (Apache, FTP, rsync,
248 Samba), you can set a file context of public_content_t and public_con‐
249 tent_rw_t. These context allow any of the above domains to read the
250 content. If you want a particular domain to write to the public_con‐
251 tent_rw_t domain, you must set the appropriate boolean.
252 Allow tftpd servers to read the /var/tftpd directory by adding the pub‐
254 lic_content_t file type to the directory and by restoring the file
255 type.
256 semanage fcontext -a -t public_content_t "/var/tftpd(/.*)?"
258 restorecon -F -R -v /var/tftpd
259 Allow tftpd servers to read and write /var/tftpd/incoming by adding the
261 public_content_rw_t type to the directory and by restoring the file
262 type. You also need to turn on the tftpd_anon_write boolean.
263 semanage fcontext -a -t public_content_rw_t "/var/tftpd/incoming(/.*)?"
265 restorecon -F -R -v /var/tftpd/incoming
266 setsebool -P tftpd_anon_write 1
267 If you want to allow tftp to modify public files used for public file
270 transfer services., you must turn on the tftp_anon_write boolean.
271 setsebool -P tftp_anon_write 1
273
276 semanage fcontext can also be used to manipulate default file context
277 mappings.
278 semanage permissive can also be used to manipulate whether or not a
280 process type is permissive.
281 semanage module can also be used to enable/disable/install/remove pol‐
283 icy modules.
284 semanage port can also be used to manipulate the port definitions
286 semanage boolean can also be used to manipulate the booleans
288 system-config-selinux is a GUI tool available to customize SELinux pol‐
291 icy settings.
292
295 This manual page was auto-generated using sepolicy manpage .
296
299 selinux(8), tftpd(8), semanage(8), restorecon(8), chcon(1), sepol‐
300 icy(8), setsebool(8)
301tftpd 21-06-09 tftpd_selinux(8)