1ftpd_selinux(8) SELinux Policy ftpd ftpd_selinux(8)
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6 ftpd_selinux - Security Enhanced Linux Policy for the ftpd processes
7
9 Security-Enhanced Linux secures the ftpd processes via flexible manda‐
10 tory access control.
11 The ftpd processes execute with the ftpd_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 ftpd_t
19
23 The ftpd_t SELinux type can be entered via the ftpd_exec_t file type.
24 The default entrypoint paths for the ftpd_t domain are the following:
26 /usr/sbin/ftpwho, /usr/sbin/vsftpd, /usr/sbin/in.ftpd,
28 /usr/sbin/proftpd, /usr/sbin/muddleftpd, /usr/kerberos/sbin/ftpd,
29 /etc/cron.monthly/proftpd
30
32 SELinux defines process types (domains) for each process running on the
33 system
34 You can see the context of a process using the -Z option to ps
36 Policy governs the access confined processes have to files. SELinux
38 ftpd policy is very flexible allowing users to setup their ftpd pro‐
39 cesses in as secure a method as possible.
40 The following process types are defined for ftpd:
42 ftpd_t, ftpdctl_t
44 Note: semanage permissive -a ftpd_t can be used to make the process
46 type ftpd_t permissive. SELinux does not deny access to permissive
47 process types, but the AVC (SELinux denials) messages are still gener‐
48 ated.
49
52 SELinux policy is customizable based on least access required. ftpd
53 policy is extremely flexible and has several booleans that allow you to
54 manipulate the policy and run ftpd with the tightest access possible.
55 If you want to determine whether ftpd can connect to all unreserved
59 ports, you must turn on the ftpd_connect_all_unreserved boolean. Dis‐
60 abled by default.
61 setsebool -P ftpd_connect_all_unreserved 1
63 If you want to determine whether ftpd can connect to databases over the
67 TCP network, you must turn on the ftpd_connect_db boolean. Disabled by
68 default.
69 setsebool -P ftpd_connect_db 1
71 If you want to determine whether ftpd can login to local users and can
75 read and write all files on the system, governed by DAC, you must turn
76 on the ftpd_full_access boolean. Disabled by default.
77 setsebool -P ftpd_full_access 1
79 If you want to determine whether ftpd can use CIFS used for public file
83 transfer services, you must turn on the ftpd_use_cifs boolean. Disabled
84 by default.
85 setsebool -P ftpd_use_cifs 1
87 If you want to allow ftpd to use ntfs/fusefs volumes, you must turn on
91 the ftpd_use_fusefs boolean. Disabled by default.
92 setsebool -P ftpd_use_fusefs 1
94 If you want to determine whether ftpd can use NFS used for public file
98 transfer services, you must turn on the ftpd_use_nfs boolean. Disabled
99 by default.
100 setsebool -P ftpd_use_nfs 1
102 If you want to determine whether ftpd can bind to all unreserved ports
106 for passive mode, you must turn on the ftpd_use_passive_mode boolean.
107 Disabled by default.
108 setsebool -P ftpd_use_passive_mode 1
110 If you want to allow users to resolve user passwd entries directly from
114 ldap rather then using a sssd server, you must turn on the authlo‐
115 gin_nsswitch_use_ldap boolean. Disabled by default.
116 setsebool -P authlogin_nsswitch_use_ldap 1
118 If you want to allow all daemons to write corefiles to /, you must turn
122 on the daemons_dump_core boolean. Disabled by default.
123 setsebool -P daemons_dump_core 1
125 If you want to enable cluster mode for daemons, you must turn on the
129 daemons_enable_cluster_mode boolean. Enabled by default.
130 setsebool -P daemons_enable_cluster_mode 1
132 If you want to allow all daemons to use tcp wrappers, you must turn on
136 the daemons_use_tcp_wrapper boolean. Disabled by default.
137 setsebool -P daemons_use_tcp_wrapper 1
139 If you want to allow all daemons the ability to read/write terminals,
143 you must turn on the daemons_use_tty boolean. Disabled by default.
144 setsebool -P daemons_use_tty 1
146 If you want to deny any process from ptracing or debugging any other
150 processes, you must turn on the deny_ptrace boolean. Enabled by
151 default.
152 setsebool -P deny_ptrace 1
154 If you want to allow any process to mmap any file on system with
158 attribute file_type, you must turn on the domain_can_mmap_files bool‐
159 ean. Enabled by default.
160 setsebool -P domain_can_mmap_files 1
162 If you want to allow all domains write to kmsg_device, while kernel is
166 executed with systemd.log_target=kmsg parameter, you must turn on the
167 domain_can_write_kmsg boolean. Disabled by default.
168 setsebool -P domain_can_write_kmsg 1
170 If you want to allow all domains to use other domains file descriptors,
174 you must turn on the domain_fd_use boolean. Enabled by default.
175 setsebool -P domain_fd_use 1
177 If you want to allow all domains to have the kernel load modules, you
181 must turn on the domain_kernel_load_modules boolean. Disabled by
182 default.
183 setsebool -P domain_kernel_load_modules 1
185 If you want to allow all domains to execute in fips_mode, you must turn
189 on the fips_mode boolean. Enabled by default.
190 setsebool -P fips_mode 1
192 If you want to enable reading of urandom for all domains, you must turn
196 on the global_ssp boolean. Disabled by default.
197 setsebool -P global_ssp 1
199 If you want to allow confined applications to run with kerberos, you
203 must turn on the kerberos_enabled boolean. Enabled by default.
204 setsebool -P kerberos_enabled 1
206 If you want to allow system to run with NIS, you must turn on the
210 nis_enabled boolean. Disabled by default.
211 setsebool -P nis_enabled 1
213 If you want to allow confined applications to use nscd shared memory,
217 you must turn on the nscd_use_shm boolean. Disabled by default.
218 setsebool -P nscd_use_shm 1
220 If you want to support NFS home directories, you must turn on the
224 use_nfs_home_dirs boolean. Disabled by default.
225 setsebool -P use_nfs_home_dirs 1
227 If you want to support SAMBA home directories, you must turn on the
231 use_samba_home_dirs boolean. Disabled by default.
232 setsebool -P use_samba_home_dirs 1
234
238 SELinux defines port types to represent TCP and UDP ports.
239 You can see the types associated with a port by using the following
241 command:
242 semanage port -l
244 Policy governs the access confined processes have to these ports.
247 SELinux ftpd policy is very flexible allowing users to setup their ftpd
248 processes in as secure a method as possible.
249 The following port types are defined for ftpd:
251 ftp_data_port_t
254 Default Defined Ports:
258 tcp 20
259 ftp_port_t
262 Default Defined Ports:
266 tcp 21,989,990
267 udp 989,990
268
270 The SELinux process type ftpd_t can manage files labeled with the fol‐
271 lowing file types. The paths listed are the default paths for these
272 file types. Note the processes UID still need to have DAC permissions.
273 cifs_t
275 cluster_var_lib_t
278 /var/lib/pcsd(/.*)?
280 /var/lib/cluster(/.*)?
281 /var/lib/openais(/.*)?
282 /var/lib/pengine(/.*)?
283 /var/lib/corosync(/.*)?
284 /usr/lib/heartbeat(/.*)?
285 /var/lib/heartbeat(/.*)?
286 /var/lib/pacemaker(/.*)?
287 cluster_var_run_t
289 /var/run/crm(/.*)?
291 /var/run/cman_.*
292 /var/run/rsctmp(/.*)?
293 /var/run/aisexec.*
294 /var/run/heartbeat(/.*)?
295 /var/run/corosync-qnetd(/.*)?
296 /var/run/corosync-qdevice(/.*)?
297 /var/run/cpglockd.pid
298 /var/run/corosync.pid
299 /var/run/rgmanager.pid
300 /var/run/cluster/rgmanager.sk
301 httpd_user_content_t
303 /home/[^/]+/((www)|(web)|(public_html))(/.+)?
305 krb5_host_rcache_t
307 /var/cache/krb5rcache(/.*)?
309 /var/tmp/nfs_0
310 /var/tmp/DNS_25
311 /var/tmp/host_0
312 /var/tmp/imap_0
313 /var/tmp/HTTP_23
314 /var/tmp/HTTP_48
315 /var/tmp/ldap_55
316 /var/tmp/ldap_487
317 /var/tmp/ldapmap1_0
318 non_security_file_type
320 user_home_t
323 /home/[^/]+/.+
325 user_tmp_t
327 /dev/shm/mono.*
329 /var/run/user(/.*)?
330 /tmp/.X11-unix(/.*)?
331 /tmp/.ICE-unix(/.*)?
332 /dev/shm/pulse-shm.*
333 /tmp/.X0-lock
334 /tmp/hsperfdata_root
335 /var/tmp/hsperfdata_root
336 /home/[^/]+/tmp
337 /home/[^/]+/.tmp
338 /tmp/gconfd-[^/]+
339
342 SELinux requires files to have an extended attribute to define the file
343 type.
344 You can see the context of a file using the -Z option to ls
346 Policy governs the access confined processes have to these files.
348 SELinux ftpd policy is very flexible allowing users to setup their ftpd
349 processes in as secure a method as possible.
350 STANDARD FILE CONTEXT
352 SELinux defines the file context types for the ftpd, if you wanted to
354 store files with these types in a diffent paths, you need to execute
355 the semanage command to sepecify alternate labeling and then use
356 restorecon to put the labels on disk.
357 semanage fcontext -a -t ftpdctl_tmp_t '/srv/myftpd_content(/.*)?'
359 restorecon -R -v /srv/myftpd_content
360 Note: SELinux often uses regular expressions to specify labels that
362 match multiple files.
363 The following file types are defined for ftpd:
365 ftpd_etc_t
369 - Set files with the ftpd_etc_t type, if you want to store ftpd files
371 in the /etc directories.
372 ftpd_exec_t
376 - Set files with the ftpd_exec_t type, if you want to transition an
378 executable to the ftpd_t domain.
379 Paths:
382 /usr/sbin/ftpwho, /usr/sbin/vsftpd, /usr/sbin/in.ftpd,
383 /usr/sbin/proftpd, /usr/sbin/muddleftpd, /usr/kerberos/sbin/ftpd,
384 /etc/cron.monthly/proftpd
385 ftpd_initrc_exec_t
388 - Set files with the ftpd_initrc_exec_t type, if you want to transition
390 an executable to the ftpd_initrc_t domain.
391 Paths:
394 /etc/rc.d/init.d/vsftpd, /etc/rc.d/init.d/proftpd
395 ftpd_keytab_t
398 - Set files with the ftpd_keytab_t type, if you want to treat the files
400 as kerberos keytab files.
401 ftpd_lock_t
405 - Set files with the ftpd_lock_t type, if you want to treat the files
407 as ftpd lock data, stored under the /var/lock directory
408 ftpd_tmp_t
412 - Set files with the ftpd_tmp_t type, if you want to store ftpd tempo‐
414 rary files in the /tmp directories.
415 ftpd_tmpfs_t
419 - Set files with the ftpd_tmpfs_t type, if you want to store ftpd files
421 on a tmpfs file system.
422 ftpd_unit_file_t
426 - Set files with the ftpd_unit_file_t type, if you want to treat the
428 files as ftpd unit content.
429 ftpd_var_run_t
433 - Set files with the ftpd_var_run_t type, if you want to store the ftpd
435 files under the /run or /var/run directory.
436 ftpdctl_exec_t
440 - Set files with the ftpdctl_exec_t type, if you want to transition an
442 executable to the ftpdctl_t domain.
443 ftpdctl_tmp_t
447 - Set files with the ftpdctl_tmp_t type, if you want to store ftpdctl
449 temporary files in the /tmp directories.
450 Note: File context can be temporarily modified with the chcon command.
454 If you want to permanently change the file context you need to use the
455 semanage fcontext command. This will modify the SELinux labeling data‐
456 base. You will need to use restorecon to apply the labels.
457
460 If you want to share files with multiple domains (Apache, FTP, rsync,
461 Samba), you can set a file context of public_content_t and public_con‐
462 tent_rw_t. These context allow any of the above domains to read the
463 content. If you want a particular domain to write to the public_con‐
464 tent_rw_t domain, you must set the appropriate boolean.
465 Allow ftpd servers to read the /var/ftpd directory by adding the pub‐
467 lic_content_t file type to the directory and by restoring the file
468 type.
469 semanage fcontext -a -t public_content_t "/var/ftpd(/.*)?"
471 restorecon -F -R -v /var/ftpd
472 Allow ftpd servers to read and write /var/ftpd/incoming by adding the
474 public_content_rw_t type to the directory and by restoring the file
475 type. You also need to turn on the ftpd_anon_write boolean.
476 semanage fcontext -a -t public_content_rw_t "/var/ftpd/incoming(/.*)?"
478 restorecon -F -R -v /var/ftpd/incoming
479 setsebool -P ftpd_anon_write 1
480 If you want to determine whether ftpd can modify public files used for
483 public file transfer services. Directories/Files must be labeled pub‐
484 lic_content_rw_t., you must turn on the ftpd_anon_write boolean.
485 setsebool -P ftpd_anon_write 1
487
490 semanage fcontext can also be used to manipulate default file context
491 mappings.
492 semanage permissive can also be used to manipulate whether or not a
494 process type is permissive.
495 semanage module can also be used to enable/disable/install/remove pol‐
497 icy modules.
498 semanage port can also be used to manipulate the port definitions
500 semanage boolean can also be used to manipulate the booleans
502 system-config-selinux is a GUI tool available to customize SELinux pol‐
505 icy settings.
506
509 This manual page was auto-generated using sepolicy manpage .
510
513 selinux(8), ftpd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8)
514 , setsebool(8)
515ftpd 19-04-25 ftpd_selinux(8)