inetd_selinux(8)

1inetd_selinux(8)             SELinux Policy inetd             inetd_selinux(8)
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NAME

6       inetd_selinux - Security Enhanced Linux Policy for the inetd processes
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DESCRIPTION

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

23       The inetd_t SELinux type can be entered via the inetd_exec_t file type.
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25       The default entrypoint paths for the inetd_t domain are the following:
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27       /usr/sbin/(x)?inetd, /usr/sbin/rlinetd
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PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
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33       You can see the context of a process using the -Z option to ps
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35       Policy  governs  the  access confined processes have to files.  SELinux
36       inetd policy is very flexible allowing users to setup their inetd  pro‐
37       cesses in as secure a method as possible.
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39       The following process types are defined for inetd:
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41       inetd_t, inetd_child_t
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43       Note:  semanage  permissive  -a inetd_t can be used to make the process
44       type inetd_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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BOOLEANS

50       SELinux policy is customizable based on least access  required.   inetd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run inetd with the tightest access possible.
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56       If you want to deny user domains applications to map a memory region as
57       both  executable  and  writable,  this  is dangerous and the executable
58       should be reported in bugzilla, you must turn on the deny_execmem bool‐
59       ean. Enabled by default.
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61       setsebool -P deny_execmem 1
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65       If  you  want  to control the ability to mmap a low area of the address
66       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
67       the mmap_low_allowed boolean. Disabled by default.
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69       setsebool -P mmap_low_allowed 1
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73       If  you want to disable kernel module loading, you must turn on the se‐
74       cure_mode_insmod boolean. Enabled by default.
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76       setsebool -P secure_mode_insmod 1
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80       If you want to allow unconfined executables to make their  heap  memory
81       executable.   Doing  this  is  a  really bad idea. Probably indicates a
82       badly coded executable, but could indicate an attack.  This  executable
83       should  be  reported  in bugzilla, you must turn on the selinuxuser_ex‐
84       echeap boolean. Disabled by default.
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86       setsebool -P selinuxuser_execheap 1
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90       If you want to allow unconfined executables to make  their  stack  exe‐
91       cutable.   This  should  never, ever be necessary. Probably indicates a
92       badly coded executable, but could indicate an attack.  This  executable
93       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
94       stack boolean. Enabled by default.
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96       setsebool -P selinuxuser_execstack 1
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PORT TYPES

101       SELinux defines port types to represent TCP and UDP ports.
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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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109       Policy  governs  the  access  confined  processes  have to these ports.
110       SELinux inetd policy is very flexible allowing users to setup their in‐
111       etd processes in as secure a method as possible.
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113       The following port types are defined for inetd:
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116       inetd_child_port_t
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120       Default Defined Ports:
121                 tcp 1,9,13,19,512,544,891,892,5666
122                 udp 1,9,13,19,891,892
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MANAGED FILES

125       The SELinux process type inetd_t can manage files labeled with the fol‐
126       lowing file types.  The paths listed are the default  paths  for  these
127       file types.  Note the processes UID still need to have DAC permissions.
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129       file_type
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131            all files on the system
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FILE CONTEXTS

135       SELinux requires files to have an extended attribute to define the file
136       type.
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138       You can see the context of a file using the -Z option to ls
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140       Policy governs the access  confined  processes  have  to  these  files.
141       SELinux inetd policy is very flexible allowing users to setup their in‐
142       etd processes in as secure a method as possible.
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144       STANDARD FILE CONTEXT
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146       SELinux defines the file context types for the inetd, if you wanted  to
147       store  files  with  these types in a diffent paths, you need to execute
148       the semanage command to sepecify alternate labeling and  then  use  re‐
149       storecon to put the labels on disk.
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151       semanage   fcontext   -a  -t  inetd_child_var_run_t  '/srv/myinetd_con‐
152       tent(/.*)?'
153       restorecon -R -v /srv/myinetd_content
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155       Note: SELinux often uses regular expressions  to  specify  labels  that
156       match multiple files.
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158       The following file types are defined for inetd:
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162       inetd_child_exec_t
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164       - Set files with the inetd_child_exec_t type, if you want to transition
165       an executable to the inetd_child_t domain.
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168       Paths:
169            /usr/sbin/in..*d,    /usr/lib/pysieved/pysieved.*.py,     /usr/lo‐
170            cal/lib/pysieved/pysieved.*.py, /usr/sbin/identd
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173       inetd_child_tmp_t
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175       - Set files with the inetd_child_tmp_t type, if you want to store inetd
176       child temporary files in the /tmp directories.
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180       inetd_child_var_run_t
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182       - Set files with the inetd_child_var_run_t type, if you want  to  store
183       the inetd child files under the /run or /var/run directory.
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187       inetd_exec_t
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189       -  Set  files  with the inetd_exec_t type, if you want to transition an
190       executable to the inetd_t domain.
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193       Paths:
194            /usr/sbin/(x)?inetd, /usr/sbin/rlinetd
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197       inetd_log_t
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199       - Set files with the inetd_log_t type, if you want to treat the data as
200       inetd log data, usually stored under the /var/log directory.
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204       inetd_tmp_t
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206       -  Set files with the inetd_tmp_t type, if you want to store inetd tem‐
207       porary files in the /tmp directories.
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211       inetd_var_run_t
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213       - Set files with the inetd_var_run_t type, if you want to store the in‐
214       etd files under the /run or /var/run directory.
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218       Note:  File context can be temporarily modified with the chcon command.
219       If you want to permanently change the file context you need to use  the
220       semanage fcontext command.  This will modify the SELinux labeling data‐
221       base.  You will need to use restorecon to apply the labels.
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COMMANDS

225       semanage fcontext can also be used to manipulate default  file  context
226       mappings.
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228       semanage  permissive  can  also  be used to manipulate whether or not a
229       process type is permissive.
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231       semanage module can also be used to enable/disable/install/remove  pol‐
232       icy modules.
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234       semanage port can also be used to manipulate the port definitions
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236       semanage boolean can also be used to manipulate the booleans
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239       system-config-selinux is a GUI tool available to customize SELinux pol‐
240       icy settings.
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AUTHOR

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