ntpd_selinux(8)

1ntpd_selinux(8)               SELinux Policy ntpd              ntpd_selinux(8)
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NAME

6       ntpd_selinux - Security Enhanced Linux Policy for the ntpd processes
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DESCRIPTION

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

23       The ntpd_t SELinux type  can  be  entered  via  the  ntpd_exec_t,  ntp‐
24       date_exec_t file types.
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26       The default entrypoint paths for the ntpd_t domain are the following:
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28       /etc/cron.(daily|weekly)/ntp-server,  /etc/cron.(daily|weekly)/ntp-sim‐
29       ple,      /usr/sbin/ntpd,      /usr/sbin/sntp,       /usr/sbin/ntpdate,
30       /usr/libexec/ntpdate-wrapper
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PROCESS TYPES

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

53       SELinux  policy  is  customizable based on least access required.  ntpd
54       policy is extremely flexible and has several booleans that allow you to
55       manipulate the policy and run ntpd with the tightest access possible.
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59       If you want to allow all domains to execute in fips_mode, you must turn
60       on the fips_mode boolean. Enabled by default.
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62       setsebool -P fips_mode 1
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66       If you want to support NFS home  directories,  you  must  turn  on  the
67       use_nfs_home_dirs boolean. Enabled by default.
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69       setsebool -P use_nfs_home_dirs 1
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73       If  you  want  to  support SAMBA home directories, you must turn on the
74       use_samba_home_dirs boolean. Disabled by default.
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76       setsebool -P use_samba_home_dirs 1
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PORT TYPES

81       SELinux defines port types to represent TCP and UDP ports.
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83       You can see the types associated with a port  by  using  the  following
84       command:
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86       semanage port -l
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89       Policy  governs  the  access  confined  processes  have to these ports.
90       SELinux ntpd policy is very flexible allowing users to setup their ntpd
91       processes in as secure a method as possible.
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93       The following port types are defined for ntpd:
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96       ntp_port_t
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100       Default Defined Ports:
101                 udp 123
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MANAGED FILES

104       The  SELinux process type ntpd_t can manage files labeled with the fol‐
105       lowing file types.  The paths listed are the default  paths  for  these
106       file types.  Note the processes UID still need to have DAC permissions.
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108       cluster_conf_t
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110            /etc/cluster(/.*)?
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112       cluster_var_lib_t
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114            /var/lib/pcsd(/.*)?
115            /var/lib/cluster(/.*)?
116            /var/lib/openais(/.*)?
117            /var/lib/pengine(/.*)?
118            /var/lib/corosync(/.*)?
119            /usr/lib/heartbeat(/.*)?
120            /var/lib/heartbeat(/.*)?
121            /var/lib/pacemaker(/.*)?
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123       cluster_var_run_t
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125            /var/run/crm(/.*)?
126            /var/run/cman_.*
127            /var/run/rsctmp(/.*)?
128            /var/run/aisexec.*
129            /var/run/heartbeat(/.*)?
130            /var/run/corosync-qnetd(/.*)?
131            /var/run/corosync-qdevice(/.*)?
132            /var/run/corosync.pid
133            /var/run/cpglockd.pid
134            /var/run/rgmanager.pid
135            /var/run/cluster/rgmanager.sk
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137       gpsd_tmpfs_t
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139
140       ntp_drift_t
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142            /var/lib/ntp(/.*)?
143            /etc/ntp/data(/.*)?
144            /var/lib/sntp(/.*)?
145            /var/lib/sntp-kod(/.*)?
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147       ntpd_log_t
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149            /var/log/ntp.*
150            /var/log/xntpd.*
151            /var/log/ntpstats(/.*)?
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153       ntpd_tmpfs_t
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156       ntpd_var_run_t
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158            /var/run/ntpd.pid
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160       root_t
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162            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
163            /
164            /initrd
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166       timemaster_tmpfs_t
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169       tmpfs_t
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171            /dev/shm
172            /var/run/shm
173            /usr/lib/udev/devices/shm
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FILE CONTEXTS

177       SELinux requires files to have an extended attribute to define the file
178       type.
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180       You can see the context of a file using the -Z option to ls
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182       Policy governs the access  confined  processes  have  to  these  files.
183       SELinux ntpd policy is very flexible allowing users to setup their ntpd
184       processes in as secure a method as possible.
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186       STANDARD FILE CONTEXT
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188       SELinux defines the file context types for the ntpd, if you  wanted  to
189       store  files  with  these types in a diffent paths, you need to execute
190       the semanage command  to  sepecify  alternate  labeling  and  then  use
191       restorecon to put the labels on disk.
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193       semanage fcontext -a -t ntpd_var_run_t '/srv/myntpd_content(/.*)?'
194       restorecon -R -v /srv/myntpd_content
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196       Note:  SELinux  often  uses  regular expressions to specify labels that
197       match multiple files.
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199       The following file types are defined for ntpd:
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203       ntpd_exec_t
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205       - Set files with the ntpd_exec_t type, if you  want  to  transition  an
206       executable to the ntpd_t domain.
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209       Paths:
210            /etc/cron.(daily|weekly)/ntp-server, /etc/cron.(daily|weekly)/ntp-
211            simple, /usr/sbin/ntpd
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214       ntpd_initrc_exec_t
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216       - Set files with the ntpd_initrc_exec_t type, if you want to transition
217       an executable to the ntpd_initrc_t domain.
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221       ntpd_key_t
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223       - Set files with the ntpd_key_t type, if you want to treat the files as
224       ntpd key data.
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227       Paths:
228            /etc/ntp/crypto(/.*)?, /etc/ntp/keys
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231       ntpd_log_t
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233       - Set files with the ntpd_log_t type, if you want to treat the data  as
234       ntpd log data, usually stored under the /var/log directory.
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236
237       Paths:
238            /var/log/ntp.*, /var/log/xntpd.*, /var/log/ntpstats(/.*)?
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241       ntpd_tmp_t
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243       -  Set files with the ntpd_tmp_t type, if you want to store ntpd tempo‐
244       rary files in the /tmp directories.
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248       ntpd_tmpfs_t
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250       - Set files with the ntpd_tmpfs_t type, if you want to store ntpd files
251       on a tmpfs file system.
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255       ntpd_unit_file_t
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257       -  Set  files  with the ntpd_unit_file_t type, if you want to treat the
258       files as ntpd unit content.
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262       ntpd_var_run_t
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264       - Set files with the ntpd_var_run_t type, if you want to store the ntpd
265       files under the /run or /var/run directory.
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269       ntpdate_exec_t
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271       -  Set files with the ntpdate_exec_t type, if you want to transition an
272       executable to the ntpdate_t domain.
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275       Paths:
276            /usr/sbin/sntp, /usr/sbin/ntpdate, /usr/libexec/ntpdate-wrapper
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278
279       Note: File context can be temporarily modified with the chcon  command.
280       If  you want to permanently change the file context you need to use the
281       semanage fcontext command.  This will modify the SELinux labeling data‐
282       base.  You will need to use restorecon to apply the labels.
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COMMANDS

286       semanage  fcontext  can also be used to manipulate default file context
287       mappings.
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289       semanage permissive can also be used to manipulate  whether  or  not  a
290       process type is permissive.
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292       semanage  module can also be used to enable/disable/install/remove pol‐
293       icy modules.
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295       semanage port can also be used to manipulate the port definitions
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297       semanage boolean can also be used to manipulate the booleans
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299
300       system-config-selinux is a GUI tool available to customize SELinux pol‐
301       icy settings.
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AUTHOR

305       This manual page was auto-generated using sepolicy manpage .
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