1postfix_pipe_selinux(8) SELinux Policy postfix_pipe postfix_pipe_selinux(8)
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6 postfix_pipe_selinux - Security Enhanced Linux Policy for the post‐
7 fix_pipe processes
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10 Security-Enhanced Linux secures the postfix_pipe processes via flexible
11 mandatory access control.
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13 The postfix_pipe processes execute with the postfix_pipe_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_pipe_t
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24 The postfix_pipe_t SELinux type can be entered via the post‐
25 fix_pipe_exec_t file type.
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27 The default entrypoint paths for the postfix_pipe_t domain are the fol‐
28 lowing:
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30 /usr/libexec/postfix/pipe
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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_pipe policy is very flexible allowing users to setup their
40 postfix_pipe processes in as secure a method as possible.
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42 The following process types are defined for postfix_pipe:
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44 postfix_pipe_t
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46 Note: semanage permissive -a postfix_pipe_t can be used to make the
47 process type postfix_pipe_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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53 SELinux policy is customizable based on least access required. post‐
54 fix_pipe policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_pipe 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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143 The SELinux process type postfix_pipe_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 mail_spool_t
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153 /var/mail(/.*)?
154 /var/spool/imap(/.*)?
155 /var/spool/mail(/.*)?
156 /var/spool/smtpd(/.*)?
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158 postfix_pipe_tmp_t
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161 postfix_spool_t
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163 /var/spool/postfix.*
164 /var/spool/postfix/defer(/.*)?
165 /var/spool/postfix/flush(/.*)?
166 /var/spool/postfix/deferred(/.*)?
167 /var/spool/postfix/maildrop(/.*)?
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169 postfix_var_run_t
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171 /var/spool/postfix/pid/.*
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175 SELinux requires files to have an extended attribute to define the file
176 type.
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178 You can see the context of a file using the -Z option to ls
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180 Policy governs the access confined processes have to these files.
181 SELinux postfix_pipe policy is very flexible allowing users to setup
182 their postfix_pipe processes in as secure a method as possible.
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184 STANDARD FILE CONTEXT
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186 SELinux defines the file context types for the postfix_pipe, if you
187 wanted to store files with these types in a diffent paths, you need to
188 execute the semanage command to sepecify alternate labeling and then
189 use restorecon to put the labels on disk.
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191 semanage fcontext -a -t postfix_pipe_tmp_t '/srv/mypostfix_pipe_con‐
192 tent(/.*)?'
193 restorecon -R -v /srv/mypostfix_pipe_content
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195 Note: SELinux often uses regular expressions to specify labels that
196 match multiple files.
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198 The following file types are defined for postfix_pipe:
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202 postfix_pipe_exec_t
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204 - Set files with the postfix_pipe_exec_t type, if you want to transi‐
205 tion an executable to the postfix_pipe_t domain.
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209 postfix_pipe_tmp_t
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211 - Set files with the postfix_pipe_tmp_t type, if you want to store
212 postfix pipe temporary files in the /tmp directories.
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216 Note: File context can be temporarily modified with the chcon command.
217 If you want to permanently change the file context you need to use the
218 semanage fcontext command. This will modify the SELinux labeling data‐
219 base. You will need to use restorecon to apply the labels.
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223 semanage fcontext can also be used to manipulate default file context
224 mappings.
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226 semanage permissive can also be used to manipulate whether or not a
227 process type is permissive.
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229 semanage module can also be used to enable/disable/install/remove pol‐
230 icy modules.
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232 semanage boolean can also be used to manipulate the booleans
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235 system-config-selinux is a GUI tool available to customize SELinux pol‐
236 icy settings.
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240 This manual page was auto-generated using sepolicy manpage .
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244 selinux(8), postfix_pipe(8), semanage(8), restorecon(8), chcon(1),
245 sepolicy(8) , setsebool(8)
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249postfix_pipe 19-04-25 postfix_pipe_selinux(8)