postfix_virtual_selinux(8)

1postfix_virtual_selinux(8S)ELinux Policy postfix_virtuaplostfix_virtual_selinux(8)
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NAME

6       postfix_virtual_selinux  - Security Enhanced Linux Policy for the post‐
7       fix_virtual processes
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DESCRIPTION

10       Security-Enhanced Linux secures the postfix_virtual processes via flex‐
11       ible mandatory access control.
12
13       The   postfix_virtual  processes  execute  with  the  postfix_virtual_t
14       SELinux type. You can check if you have these processes running by exe‐
15       cuting the ps command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep postfix_virtual_t
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ENTRYPOINTS

24       The  postfix_virtual_t SELinux type can be entered via the postfix_vir‐
25       tual_exec_t file type.
26
27       The default entrypoint paths for the postfix_virtual_t domain  are  the
28       following:
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30       /usr/libexec/postfix/virtual
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PROCESS TYPES

33       SELinux defines process types (domains) for each process running on the
34       system
35
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_virtual  policy  is very flexible allowing users to setup their
40       postfix_virtual processes in as secure a method as possible.
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42       The following process types are defined for postfix_virtual:
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44       postfix_virtual_t
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46       Note: semanage permissive -a postfix_virtual_t can be used to make  the
47       process type postfix_virtual_t permissive. SELinux does not deny access
48       to 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_virtual policy is extremely flexible and has several booleans  that
55       allow  you  to  manipulate  the policy and run postfix_virtual with the
56       tightest access possible.
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59
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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120
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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142       If you want to support ecryptfs home directories, you must turn on  the
143       use_ecryptfs_home_dirs boolean. Disabled by default.
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145       setsebool -P use_ecryptfs_home_dirs 1
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149       If  you  want  to support fusefs home directories, you must turn on the
150       use_fusefs_home_dirs boolean. Disabled by default.
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152       setsebool -P use_fusefs_home_dirs 1
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156       If you want to support NFS home  directories,  you  must  turn  on  the
157       use_nfs_home_dirs boolean. Disabled by default.
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159       setsebool -P use_nfs_home_dirs 1
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162
163       If  you  want  to  support SAMBA home directories, you must turn on the
164       use_samba_home_dirs boolean. Disabled by default.
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166       setsebool -P use_samba_home_dirs 1
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169

MANAGED FILES

171       The SELinux process type postfix_virtual_t  can  manage  files  labeled
172       with  the following file types.  The paths listed are the default paths
173       for these file types.  Note the processes UID still need  to  have  DAC
174       permissions.
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176       anon_inodefs_t
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178
179       cifs_t
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181
182       dovecot_spool_t
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184            /var/spool/dovecot(/.*)?
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186       ecryptfs_t
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188            /home/[^/]+/.Private(/.*)?
189            /home/[^/]+/.ecryptfs(/.*)?
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191       fusefs_t
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193            /var/run/user/[^/]*/gvfs
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195       mail_spool_t
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197            /var/mail(/.*)?
198            /var/spool/imap(/.*)?
199            /var/spool/mail(/.*)?
200            /var/spool/smtpd(/.*)?
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202       nfs_t
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205       postfix_spool_t
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207            /var/spool/postfix.*
208            /var/spool/postfix/defer(/.*)?
209            /var/spool/postfix/flush(/.*)?
210            /var/spool/postfix/deferred(/.*)?
211            /var/spool/postfix/maildrop(/.*)?
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213       postfix_var_run_t
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215            /var/spool/postfix/pid/.*
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217       postfix_virtual_tmp_t
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220       user_home_t
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222            /home/[^/]+/.+
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224       user_home_type
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226            all user home files
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FILE CONTEXTS

230       SELinux requires files to have an extended attribute to define the file
231       type.
232
233       You can see the context of a file using the -Z option to ls
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235       Policy governs the access  confined  processes  have  to  these  files.
236       SELinux postfix_virtual policy is very flexible allowing users to setup
237       their postfix_virtual processes in as secure a method as possible.
238
239       STANDARD FILE CONTEXT
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241       SELinux defines the file context types for the postfix_virtual, if  you
242       wanted  to store files with these types in a diffent paths, you need to
243       execute the semanage command to sepecify alternate  labeling  and  then
244       use restorecon to put the labels on disk.
245
246       semanage  fcontext  -a  -t  postfix_virtual_tmp_t  '/srv/mypostfix_vir‐
247       tual_content(/.*)?'
248       restorecon -R -v /srv/mypostfix_virtual_content
249
250       Note: SELinux often uses regular expressions  to  specify  labels  that
251       match multiple files.
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253       The following file types are defined for postfix_virtual:
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257       postfix_virtual_exec_t
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259       -  Set files with the postfix_virtual_exec_t type, if you want to tran‐
260       sition an executable to the postfix_virtual_t domain.
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264       postfix_virtual_tmp_t
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266       - Set files with the postfix_virtual_tmp_t type, if you want  to  store
267       postfix virtual temporary files in the /tmp directories.
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271       Note:  File context can be temporarily modified with the chcon command.
272       If you want to permanently change the file context you need to use  the
273       semanage fcontext command.  This will modify the SELinux labeling data‐
274       base.  You will need to use restorecon to apply the labels.
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COMMANDS

278       semanage fcontext can also be used to manipulate default  file  context
279       mappings.
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281       semanage  permissive  can  also  be used to manipulate whether or not a
282       process type is permissive.
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284       semanage module can also be used to enable/disable/install/remove  pol‐
285       icy modules.
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287       semanage boolean can also be used to manipulate the booleans
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289
290       system-config-selinux is a GUI tool available to customize SELinux pol‐
291       icy settings.
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AUTHOR

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