1rshd_selinux(8) SELinux Policy rshd rshd_selinux(8)
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6 rshd_selinux - Security Enhanced Linux Policy for the rshd processes
7
9 Security-Enhanced Linux secures the rshd processes via flexible manda‐
10 tory access control.
11 The rshd processes execute with the rshd_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 rshd_t
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23 The rshd_t SELinux type can be entered via the rshd_exec_t file type.
24 The default entrypoint paths for the rshd_t domain are the following:
26 /usr/sbin/in.rshd, /usr/sbin/in.rexecd, /usr/kerberos/sbin/kshd
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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 rshd policy is very flexible allowing users to setup their rshd pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for rshd:
40 rshd_t
42 Note: semanage permissive -a rshd_t can be used to make the process
44 type rshd_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. rshd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run rshd 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
89 If you want to enable polyinstantiated directory support, you must turn
93 on the polyinstantiation_enabled boolean. Disabled by default.
94 setsebool -P polyinstantiation_enabled 1
96
100 SELinux defines port types to represent TCP and UDP ports.
101 You can see the types associated with a port by using the following
103 command:
104 semanage port -l
106 Policy governs the access confined processes have to these ports.
109 SELinux rshd policy is very flexible allowing users to setup their rshd
110 processes in as secure a method as possible.
111 The following port types are defined for rshd:
113 rsh_port_t
116 Default Defined Ports:
120 tcp 514
121
123 The SELinux process type rshd_t can manage files labeled with the fol‐
124 lowing file types. The paths listed are the default paths for these
125 file types. Note the processes UID still need to have DAC permissions.
126 auth_cache_t
128 /var/cache/coolkey(/.*)?
130 auth_home_t
132 /root/.yubico(/.*)?
134 /root/.google_authenticator
135 /root/.google_authenticator~
136 /home/[^/]+/.yubico(/.*)?
137 /home/[^/]+/.google_authenticator
138 /home/[^/]+/.google_authenticator~
139 cgroup_t
141 /sys/fs/cgroup
143 faillog_t
145 /var/log/btmp.*
147 /var/log/faillog.*
148 /var/log/tallylog.*
149 /var/run/faillock(/.*)?
150 initrc_var_run_t
152 /var/run/utmp
154 /var/run/random-seed
155 /var/run/runlevel.dir
156 /var/run/setmixer_flag
157 kdbusfs_t
159 krb5_host_rcache_t
162 /var/cache/krb5rcache(/.*)?
164 /var/tmp/nfs_0
165 /var/tmp/DNS_25
166 /var/tmp/host_0
167 /var/tmp/imap_0
168 /var/tmp/HTTP_23
169 /var/tmp/HTTP_48
170 /var/tmp/ldap_55
171 /var/tmp/ldap_487
172 /var/tmp/ldapmap1_0
173 lastlog_t
175 /var/log/lastlog.*
177 pam_var_run_t
179 /var/(db|adm)/sudo(/.*)?
181 /var/lib/sudo(/.*)?
182 /var/run/sudo(/.*)?
183 /var/run/motd.d(/.*)?
184 /var/run/sepermit(/.*)?
185 /var/run/pam_mount(/.*)?
186 /var/run/motd
187 security_t
189 /selinux
191 user_tmp_t
193 /dev/shm/mono.*
195 /var/run/user(/.*)?
196 /tmp/.ICE-unix(/.*)?
197 /tmp/.X11-unix(/.*)?
198 /dev/shm/pulse-shm.*
199 /tmp/.X0-lock
200 /tmp/hsperfdata_root
201 /var/tmp/hsperfdata_root
202 /home/[^/]+/tmp
203 /home/[^/]+/.tmp
204 /tmp/gconfd-[^/]+
205 user_tmp_type
207 all user tmp files
209 var_auth_t
211 /var/ace(/.*)?
213 /var/rsa(/.*)?
214 /var/lib/abl(/.*)?
215 /var/lib/rsa(/.*)?
216 /var/lib/pam_ssh(/.*)?
217 /var/run/pam_ssh(/.*)?
218 /var/lib/pam_shield(/.*)?
219 /var/opt/quest/vas/vasd(/.*)?
220 /var/lib/google-authenticator(/.*)?
221 wtmp_t
223 /var/log/wtmp.*
225
228 SELinux requires files to have an extended attribute to define the file
229 type.
230 You can see the context of a file using the -Z option to ls
232 Policy governs the access confined processes have to these files.
234 SELinux rshd policy is very flexible allowing users to setup their rshd
235 processes in as secure a method as possible.
236 STANDARD FILE CONTEXT
238 SELinux defines the file context types for the rshd, if you wanted to
240 store files with these types in a diffent paths, you need to execute
241 the semanage command to sepecify alternate labeling and then use
242 restorecon to put the labels on disk.
243 semanage fcontext -a -t rshd_keytab_t '/srv/myrshd_content(/.*)?'
245 restorecon -R -v /srv/myrshd_content
246 Note: SELinux often uses regular expressions to specify labels that
248 match multiple files.
249 The following file types are defined for rshd:
251 rshd_exec_t
255 - Set files with the rshd_exec_t type, if you want to transition an
257 executable to the rshd_t domain.
258 Paths:
261 /usr/sbin/in.rshd, /usr/sbin/in.rexecd, /usr/kerberos/sbin/kshd
262 rshd_keytab_t
265 - Set files with the rshd_keytab_t type, if you want to treat the files
267 as kerberos keytab files.
268 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.
275
278 semanage fcontext can also be used to manipulate default file context
279 mappings.
280 semanage permissive can also be used to manipulate whether or not a
282 process type is permissive.
283 semanage module can also be used to enable/disable/install/remove pol‐
285 icy modules.
286 semanage port can also be used to manipulate the port definitions
288 semanage boolean can also be used to manipulate the booleans
290 system-config-selinux is a GUI tool available to customize SELinux pol‐
293 icy settings.
294
297 This manual page was auto-generated using sepolicy manpage .
298
301 selinux(8), rshd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
302 setsebool(8)
303rshd 19-12-02 rshd_selinux(8)