1tcsd_selinux(8) SELinux Policy tcsd tcsd_selinux(8)
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6 tcsd_selinux - Security Enhanced Linux Policy for the tcsd processes
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9 Security-Enhanced Linux secures the tcsd processes via flexible manda‐
10 tory access control.
11 The tcsd processes execute with the tcsd_t SELinux type. You can check
13 if you have these processes running by executing the ps command with
14 the -Z qualifier.
15 For example:
17 ps -eZ | grep tcsd_t
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23 The tcsd_t SELinux type can be entered via the tcsd_exec_t file type.
24 The default entrypoint paths for the tcsd_t domain are the following:
26 /usr/sbin/tcsd
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30 SELinux defines process types (domains) for each process running on the
31 system
32 You can see the context of a process using the -Z option to ps
34 Policy governs the access confined processes have to files. SELinux
36 tcsd policy is very flexible allowing users to setup their tcsd pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for tcsd:
40 tcsd_t
42 Note: semanage permissive -a tcsd_t can be used to make the process
44 type tcsd_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
47
50 SELinux policy is customizable based on least access required. tcsd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run tcsd with the tightest access possible.
53 If you want to allow users to resolve user passwd entries directly from
57 ldap rather then using a sssd server, you must turn on the authlo‐
58 gin_nsswitch_use_ldap boolean. Disabled by default.
59 setsebool -P authlogin_nsswitch_use_ldap 1
61 If you want to allow all domains to execute in fips_mode, you must turn
65 on the fips_mode boolean. Enabled by default.
66 setsebool -P fips_mode 1
68 If you want to allow confined applications to run with kerberos, you
72 must turn on the kerberos_enabled boolean. Disabled by default.
73 setsebool -P kerberos_enabled 1
75 If you want to allow system to run with NIS, you must turn on the
79 nis_enabled boolean. Disabled by default.
80 setsebool -P nis_enabled 1
82 If you want to allow confined applications to use nscd shared memory,
86 you must turn on the nscd_use_shm boolean. Disabled by default.
87 setsebool -P nscd_use_shm 1
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93 SELinux defines port types to represent TCP and UDP ports.
94 You can see the types associated with a port by using the following
96 command:
97 semanage port -l
99 Policy governs the access confined processes have to these ports.
102 SELinux tcsd policy is very flexible allowing users to setup their tcsd
103 processes in as secure a method as possible.
104 The following port types are defined for tcsd:
106 tcs_port_t
109 Default Defined Ports:
113 tcp 30003
114
116 The SELinux process type tcsd_t can manage files labeled with the fol‐
117 lowing file types. The paths listed are the default paths for these
118 file types. Note the processes UID still need to have DAC permissions.
119 cluster_conf_t
121 /etc/cluster(/.*)?
123 cluster_var_lib_t
125 /var/lib/pcsd(/.*)?
127 /var/lib/cluster(/.*)?
128 /var/lib/openais(/.*)?
129 /var/lib/pengine(/.*)?
130 /var/lib/corosync(/.*)?
131 /usr/lib/heartbeat(/.*)?
132 /var/lib/heartbeat(/.*)?
133 /var/lib/pacemaker(/.*)?
134 cluster_var_run_t
136 /var/run/crm(/.*)?
138 /var/run/cman_.*
139 /var/run/rsctmp(/.*)?
140 /var/run/aisexec.*
141 /var/run/heartbeat(/.*)?
142 /var/run/corosync-qnetd(/.*)?
143 /var/run/corosync-qdevice(/.*)?
144 /var/run/corosync.pid
145 /var/run/cpglockd.pid
146 /var/run/rgmanager.pid
147 /var/run/cluster/rgmanager.sk
148 root_t
150 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
152 /
153 /initrd
154 tcsd_var_lib_t
156 /var/lib/tpm(/.*)?
158
161 SELinux requires files to have an extended attribute to define the file
162 type.
163 You can see the context of a file using the -Z option to ls
165 Policy governs the access confined processes have to these files.
167 SELinux tcsd policy is very flexible allowing users to setup their tcsd
168 processes in as secure a method as possible.
169 STANDARD FILE CONTEXT
171 SELinux defines the file context types for the tcsd, if you wanted to
173 store files with these types in a diffent paths, you need to execute
174 the semanage command to sepecify alternate labeling and then use
175 restorecon to put the labels on disk.
176 semanage fcontext -a -t tcsd_var_lib_t '/srv/mytcsd_content(/.*)?'
178 restorecon -R -v /srv/mytcsd_content
179 Note: SELinux often uses regular expressions to specify labels that
181 match multiple files.
182 The following file types are defined for tcsd:
184 tcsd_exec_t
188 - Set files with the tcsd_exec_t type, if you want to transition an
190 executable to the tcsd_t domain.
191 tcsd_initrc_exec_t
195 - Set files with the tcsd_initrc_exec_t type, if you want to transition
197 an executable to the tcsd_initrc_t domain.
198 tcsd_var_lib_t
202 - Set files with the tcsd_var_lib_t type, if you want to store the tcsd
204 files under the /var/lib directory.
205 Note: File context can be temporarily modified with the chcon command.
209 If you want to permanently change the file context you need to use the
210 semanage fcontext command. This will modify the SELinux labeling data‐
211 base. You will need to use restorecon to apply the labels.
212
215 semanage fcontext can also be used to manipulate default file context
216 mappings.
217 semanage permissive can also be used to manipulate whether or not a
219 process type is permissive.
220 semanage module can also be used to enable/disable/install/remove pol‐
222 icy modules.
223 semanage port can also be used to manipulate the port definitions
225 semanage boolean can also be used to manipulate the booleans
227 system-config-selinux is a GUI tool available to customize SELinux pol‐
230 icy settings.
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234 This manual page was auto-generated using sepolicy manpage .
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238 selinux(8), tcsd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
239 setsebool(8)
240tcsd 19-12-02 tcsd_selinux(8)