1postfix_master_selinux(8)SELinux Policy postfix_masterpostfix_master_selinux(8)
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6 postfix_master_selinux - Security Enhanced Linux Policy for the post‐
7 fix_master processes
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10 Security-Enhanced Linux secures the postfix_master processes via flexi‐
11 ble mandatory access control.
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13 The postfix_master processes execute with the postfix_master_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_master_t
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24 The postfix_master_t SELinux type can be entered via the postfix_mas‐
25 ter_exec_t file type.
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27 The default entrypoint paths for the postfix_master_t domain are the
28 following:
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30 /usr/sbin/postcat, /usr/sbin/postfix, /usr/sbin/postlog,
31 /usr/sbin/postkick, /usr/sbin/postlock, /usr/sbin/postalias,
32 /usr/sbin/postsuper, /usr/libexec/postfix/master
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35 SELinux defines process types (domains) for each process running on the
36 system
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38 You can see the context of a process using the -Z option to ps
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40 Policy governs the access confined processes have to files. SELinux
41 postfix_master policy is very flexible allowing users to setup their
42 postfix_master processes in as secure a method as possible.
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44 The following process types are defined for postfix_master:
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46 postfix_master_t
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48 Note: semanage permissive -a postfix_master_t can be used to make the
49 process type postfix_master_t permissive. SELinux does not deny access
50 to permissive process types, but the AVC (SELinux denials) messages are
51 still generated.
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55 SELinux policy is customizable based on least access required. post‐
56 fix_master policy is extremely flexible and has several booleans that
57 allow you to manipulate the policy and run postfix_master with the
58 tightest access possible.
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62 If you want to dontaudit all daemons scheduling requests (setsched,
63 sys_nice), you must turn on the daemons_dontaudit_scheduling boolean.
64 Enabled by default.
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66 setsebool -P daemons_dontaudit_scheduling 1
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70 If you want to allow all domains to execute in fips_mode, you must turn
71 on the fips_mode boolean. Enabled by default.
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73 setsebool -P fips_mode 1
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77 If you want to allow system to run with NIS, you must turn on the
78 nis_enabled boolean. Disabled by default.
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80 setsebool -P nis_enabled 1
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85 The SELinux process type postfix_master_t can manage files labeled with
86 the following file types. The paths listed are the default paths for
87 these file types. Note the processes UID still need to have DAC per‐
88 missions.
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90 cluster_conf_t
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92 /etc/cluster(/.*)?
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94 cluster_var_lib_t
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96 /var/lib/pcsd(/.*)?
97 /var/lib/cluster(/.*)?
98 /var/lib/openais(/.*)?
99 /var/lib/pengine(/.*)?
100 /var/lib/corosync(/.*)?
101 /usr/lib/heartbeat(/.*)?
102 /var/lib/heartbeat(/.*)?
103 /var/lib/pacemaker(/.*)?
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105 cluster_var_run_t
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107 /var/run/crm(/.*)?
108 /var/run/cman_.*
109 /var/run/rsctmp(/.*)?
110 /var/run/aisexec.*
111 /var/run/heartbeat(/.*)?
112 /var/run/pcsd-ruby.socket
113 /var/run/corosync-qnetd(/.*)?
114 /var/run/corosync-qdevice(/.*)?
115 /var/run/corosync.pid
116 /var/run/cpglockd.pid
117 /var/run/rgmanager.pid
118 /var/run/cluster/rgmanager.sk
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120 krb5_host_rcache_t
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122 /var/tmp/krb5_0.rcache2
123 /var/cache/krb5rcache(/.*)?
124 /var/tmp/nfs_0
125 /var/tmp/DNS_25
126 /var/tmp/host_0
127 /var/tmp/imap_0
128 /var/tmp/HTTP_23
129 /var/tmp/HTTP_48
130 /var/tmp/ldap_55
131 /var/tmp/ldap_487
132 /var/tmp/ldapmap1_0
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134 mailman_data_t
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136 /etc/mailman.*
137 /var/lib/mailman(/.*)?
138 /var/spool/mailman.*
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140 postfix_data_t
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142 /var/lib/postfix.*
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144 postfix_private_t
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146 /var/spool/postfix/private(/.*)?
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148 postfix_prng_t
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150 /etc/postfix/prng_exch
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152 postfix_spool_t
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154 /var/spool/postfix.*
155 /var/spool/postfix/defer(/.*)?
156 /var/spool/postfix/flush(/.*)?
157 /var/spool/postfix/deferred(/.*)?
158 /var/spool/postfix/maildrop(/.*)?
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160 postfix_var_run_t
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162 /var/spool/postfix/pid/.*
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164 root_t
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166 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
167 /
168 /initrd
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172 SELinux requires files to have an extended attribute to define the file
173 type.
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175 You can see the context of a file using the -Z option to ls
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177 Policy governs the access confined processes have to these files.
178 SELinux postfix_master policy is very flexible allowing users to setup
179 their postfix_master processes in as secure a method as possible.
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181 STANDARD FILE CONTEXT
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183 SELinux defines the file context types for the postfix_master, if you
184 wanted to store files with these types in a different paths, you need
185 to execute the semanage command to specify alternate labeling and then
186 use restorecon to put the labels on disk.
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188 semanage fcontext -a -t postfix_master_exec_t '/srv/postfix_master/con‐
189 tent(/.*)?'
190 restorecon -R -v /srv/mypostfix_master_content
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192 Note: SELinux often uses regular expressions to specify labels that
193 match multiple files.
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195 The following file types are defined for postfix_master:
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199 postfix_master_exec_t
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201 - Set files with the postfix_master_exec_t type, if you want to transi‐
202 tion an executable to the postfix_master_t domain.
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205 Paths:
206 /usr/sbin/postcat, /usr/sbin/postfix, /usr/sbin/postlog,
207 /usr/sbin/postkick, /usr/sbin/postlock, /usr/sbin/postalias,
208 /usr/sbin/postsuper, /usr/libexec/postfix/master
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211 Note: File context can be temporarily modified with the chcon command.
212 If you want to permanently change the file context you need to use the
213 semanage fcontext command. This will modify the SELinux labeling data‐
214 base. You will need to use restorecon to apply the labels.
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218 semanage fcontext can also be used to manipulate default file context
219 mappings.
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221 semanage permissive can also be used to manipulate whether or not a
222 process type is permissive.
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224 semanage module can also be used to enable/disable/install/remove pol‐
225 icy modules.
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227 semanage boolean can also be used to manipulate the booleans
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230 system-config-selinux is a GUI tool available to customize SELinux pol‐
231 icy settings.
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235 This manual page was auto-generated using sepolicy manpage .
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239 selinux(8), postfix_master(8), semanage(8), restorecon(8), chcon(1),
240 sepolicy(8), setsebool(8)
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244postfix_master 23-10-20 postfix_master_selinux(8)