1postfix_cleanup_selinux(8S)ELinux Policy postfix_cleanuppostfix_cleanup_selinux(8)
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6 postfix_cleanup_selinux - Security Enhanced Linux Policy for the post‐
7 fix_cleanup processes
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10 Security-Enhanced Linux secures the postfix_cleanup processes via flex‐
11 ible mandatory access control.
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13 The postfix_cleanup processes execute with the postfix_cleanup_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_cleanup_t
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24 The postfix_cleanup_t SELinux type can be entered via the post‐
25 fix_cleanup_exec_t file type.
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27 The default entrypoint paths for the postfix_cleanup_t domain are the
28 following:
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30 /usr/libexec/postfix/cleanup
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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_cleanup policy is very flexible allowing users to setup their
40 postfix_cleanup processes in as secure a method as possible.
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42 The following process types are defined for postfix_cleanup:
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44 postfix_cleanup_t
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46 Note: semanage permissive -a postfix_cleanup_t can be used to make the
47 process type postfix_cleanup_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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53 SELinux policy is customizable based on least access required. post‐
54 fix_cleanup policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_cleanup with the
56 tightest 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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143 The SELinux process type postfix_cleanup_t can manage files labeled
144 with the following file types. The paths listed are the default paths
145 for these file types. Note the processes UID still need to have DAC
146 permissions.
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148 anon_inodefs_t
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151 postfix_cleanup_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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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_cleanup policy is very flexible allowing users to setup
175 their postfix_cleanup 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_cleanup, 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_cleanup_tmp_t '/srv/mypost‐
185 fix_cleanup_content(/.*)?'
186 restorecon -R -v /srv/mypostfix_cleanup_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_cleanup:
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195 postfix_cleanup_exec_t
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197 - Set files with the postfix_cleanup_exec_t type, if you want to tran‐
198 sition an executable to the postfix_cleanup_t domain.
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202 postfix_cleanup_tmp_t
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204 - Set files with the postfix_cleanup_tmp_t type, if you want to store
205 postfix cleanup 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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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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233 This manual page was auto-generated using sepolicy manpage .
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237 selinux(8), postfix_cleanup(8), semanage(8), restorecon(8), chcon(1),
238 sepolicy(8) , setsebool(8)
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242postfix_cleanup 19-04-25 postfix_cleanup_selinux(8)