postfix_qmgr_selinux(8)

1postfix_qmgr_selinux(8)   SELinux Policy postfix_qmgr  postfix_qmgr_selinux(8)
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NAME

6       postfix_qmgr_selinux  -  Security  Enhanced  Linux Policy for the post‐
7       fix_qmgr processes
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DESCRIPTION

10       Security-Enhanced Linux secures the postfix_qmgr processes via flexible
11       mandatory access control.
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13       The  postfix_qmgr  processes  execute  with  the postfix_qmgr_t SELinux
14       type. You can check if you have these processes  running  by  executing
15       the ps command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep postfix_qmgr_t
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ENTRYPOINTS

24       The   postfix_qmgr_t   SELinux  type  can  be  entered  via  the  post‐
25       fix_qmgr_exec_t file type.
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27       The default entrypoint paths for the postfix_qmgr_t domain are the fol‐
28       lowing:
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30       /usr/libexec/postfix/(n)?qmgr
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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       postfix_qmgr  policy  is  very  flexible  allowing users to setup their
40       postfix_qmgr processes in as secure a method as possible.
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42       The following process types are defined for postfix_qmgr:
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44       postfix_qmgr_t
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46       Note: semanage permissive -a postfix_qmgr_t can be  used  to  make  the
47       process type postfix_qmgr_t permissive. SELinux does not deny access to
48       permissive process types, but the AVC (SELinux  denials)  messages  are
49       still generated.
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BOOLEANS

53       SELinux  policy  is customizable based on least access required.  post‐
54       fix_qmgr policy is extremely flexible and  has  several  booleans  that
55       allow you to manipulate the policy and run postfix_qmgr with the tight‐
56       est access possible.
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60       If you want to allow users to resolve user passwd entries directly from
61       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
62       gin_nsswitch_use_ldap boolean. Disabled by default.
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64       setsebool -P authlogin_nsswitch_use_ldap 1
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68       If you want to deny any process from ptracing or  debugging  any  other
69       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
70       default.
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72       setsebool -P deny_ptrace 1
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76       If you want to allow any process  to  mmap  any  file  on  system  with
77       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
78       ean. Enabled by default.
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80       setsebool -P domain_can_mmap_files 1
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84       If you want to allow all domains write to kmsg_device, while kernel  is
85       executed  with  systemd.log_target=kmsg parameter, you must turn on the
86       domain_can_write_kmsg boolean. Disabled by default.
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88       setsebool -P domain_can_write_kmsg 1
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92       If you want to allow all domains to use other domains file descriptors,
93       you must turn on the domain_fd_use boolean. Enabled by default.
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95       setsebool -P domain_fd_use 1
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99       If  you  want to allow all domains to have the kernel load modules, you
100       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
101       default.
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103       setsebool -P domain_kernel_load_modules 1
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107       If you want to allow all domains to execute in fips_mode, you must turn
108       on the fips_mode boolean. Enabled by default.
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110       setsebool -P fips_mode 1
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114       If you want to enable reading of urandom for all domains, you must turn
115       on the global_ssp boolean. Disabled by default.
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117       setsebool -P global_ssp 1
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121       If  you  want  to allow confined applications to run with kerberos, you
122       must turn on the kerberos_enabled boolean. Enabled by default.
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124       setsebool -P kerberos_enabled 1
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128       If you want to allow system to run with  NIS,  you  must  turn  on  the
129       nis_enabled boolean. Disabled by default.
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131       setsebool -P nis_enabled 1
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135       If  you  want to allow confined applications to use nscd shared memory,
136       you must turn on the nscd_use_shm boolean. Disabled by default.
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138       setsebool -P nscd_use_shm 1
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MANAGED FILES

143       The SELinux process type postfix_qmgr_t can manage files  labeled  with
144       the  following  file types.  The paths listed are the default paths for
145       these file types.  Note the processes UID still need to have  DAC  per‐
146       missions.
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148       anon_inodefs_t
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151       postfix_qmgr_tmp_t
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154       postfix_spool_t
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156            /var/spool/postfix.*
157            /var/spool/postfix/defer(/.*)?
158            /var/spool/postfix/flush(/.*)?
159            /var/spool/postfix/deferred(/.*)?
160            /var/spool/postfix/maildrop(/.*)?
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162       postfix_var_run_t
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164            /var/spool/postfix/pid/.*
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FILE CONTEXTS

168       SELinux requires files to have an extended attribute to define the file
169       type.
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171       You can see the context of a file using the -Z option to ls
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173       Policy governs the access  confined  processes  have  to  these  files.
174       SELinux  postfix_qmgr  policy  is very flexible allowing users to setup
175       their postfix_qmgr processes in as secure a method as possible.
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177       STANDARD FILE CONTEXT
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179       SELinux defines the file context types for  the  postfix_qmgr,  if  you
180       wanted  to store files with these types in a diffent paths, you need to
181       execute the semanage command to sepecify alternate  labeling  and  then
182       use restorecon to put the labels on disk.
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184       semanage  fcontext  -a  -t postfix_qmgr_tmp_t '/srv/mypostfix_qmgr_con‐
185       tent(/.*)?'
186       restorecon -R -v /srv/mypostfix_qmgr_content
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188       Note: SELinux often uses regular expressions  to  specify  labels  that
189       match multiple files.
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191       The following file types are defined for postfix_qmgr:
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195       postfix_qmgr_exec_t
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197       -  Set  files with the postfix_qmgr_exec_t type, if you want to transi‐
198       tion an executable to the postfix_qmgr_t domain.
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202       postfix_qmgr_tmp_t
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204       - Set files with the postfix_qmgr_tmp_t type,  if  you  want  to  store
205       postfix qmgr temporary files in the /tmp directories.
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209       Note:  File context can be temporarily modified with the chcon command.
210       If you want to permanently change the file context you need to use  the
211       semanage fcontext command.  This will modify the SELinux labeling data‐
212       base.  You will need to use restorecon to apply the labels.
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COMMANDS

216       semanage fcontext can also be used to manipulate default  file  context
217       mappings.
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219       semanage  permissive  can  also  be used to manipulate whether or not a
220       process type is permissive.
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222       semanage module can also be used to enable/disable/install/remove  pol‐
223       icy modules.
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225       semanage boolean can also be used to manipulate the booleans
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228       system-config-selinux is a GUI tool available to customize SELinux pol‐
229       icy settings.
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AUTHOR

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