squid_selinux(8)

1squid_selinux(8)             SELinux Policy squid             squid_selinux(8)
2
3
4

NAME

6       squid_selinux - Security Enhanced Linux Policy for the squid processes
7

DESCRIPTION

9       Security-Enhanced Linux secures the squid processes via flexible manda‐
10       tory access control.
11
12       The squid processes execute with the  squid_t  SELinux  type.  You  can
13       check  if  you have these processes running by executing the ps command
14       with the -Z qualifier.
15
16       For example:
17
18       ps -eZ | grep squid_t
19
20
21

ENTRYPOINTS

23       The squid_t SELinux type can be entered via the squid_exec_t file type.
24
25       The default entrypoint paths for the squid_t domain are the following:
26
27       /usr/sbin/squid
28

PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
32
33       You can see the context of a process using the -Z option to ps
34
35       Policy  governs  the  access confined processes have to files.  SELinux
36       squid policy is very flexible allowing users to setup their squid  pro‐
37       cesses in as secure a method as possible.
38
39       The following process types are defined for squid:
40
41       squid_t
42
43       Note:  semanage  permissive  -a squid_t can be used to make the process
44       type squid_t permissive. SELinux does not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
47
48

BOOLEANS

50       SELinux policy is customizable based on least access  required.   squid
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run squid with the tightest access possible.
53
54
55
56       If you want to allow squid to connect to all ports, not just HTTP, FTP,
57       and  Gopher  ports,  you  must  turn  on the squid_connect_any boolean.
58       Enabled by default.
59
60       setsebool -P squid_connect_any 1
61
62
63
64       If you want to allow squid to run as a transparent proxy (TPROXY),  you
65       must turn on the squid_use_tproxy boolean. Disabled by default.
66
67       setsebool -P squid_use_tproxy 1
68
69
70
71       If you want to allow all daemons to write corefiles to /, you must turn
72       on the allow_daemons_dump_core boolean. Disabled by default.
73
74       setsebool -P allow_daemons_dump_core 1
75
76
77
78       If you want to allow all daemons to use tcp wrappers, you must turn  on
79       the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
80
81       setsebool -P allow_daemons_use_tcp_wrapper 1
82
83
84
85       If  you  want to allow all daemons the ability to read/write terminals,
86       you  must  turn  on  the  allow_daemons_use_tty  boolean.  Disabled  by
87       default.
88
89       setsebool -P allow_daemons_use_tty 1
90
91
92
93       If you want to allow all domains to use other domains file descriptors,
94       you must turn on the allow_domain_fd_use boolean. Enabled by default.
95
96       setsebool -P allow_domain_fd_use 1
97
98
99
100       If you want to allow confined applications to run  with  kerberos,  you
101       must turn on the allow_kerberos boolean. Enabled by default.
102
103       setsebool -P allow_kerberos 1
104
105
106
107       If  you want to allow sysadm to debug or ptrace all processes, you must
108       turn on the allow_ptrace boolean. Disabled by default.
109
110       setsebool -P allow_ptrace 1
111
112
113
114       If you want to allow system to run with  NIS,  you  must  turn  on  the
115       allow_ypbind boolean. Disabled by default.
116
117       setsebool -P allow_ypbind 1
118
119
120
121       If  you  want  to enable cluster mode for daemons, you must turn on the
122       daemons_enable_cluster_mode boolean. Disabled by default.
123
124       setsebool -P daemons_enable_cluster_mode 1
125
126
127
128       If you want to allow all domains to have the kernel load  modules,  you
129       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
130       default.
131
132       setsebool -P domain_kernel_load_modules 1
133
134
135
136       If you want to allow all domains to execute in fips_mode, you must turn
137       on the fips_mode boolean. Enabled by default.
138
139       setsebool -P fips_mode 1
140
141
142
143       If you want to enable reading of urandom for all domains, you must turn
144       on the global_ssp boolean. Disabled by default.
145
146       setsebool -P global_ssp 1
147
148
149
150       If you want to enable support for upstart as the init program, you must
151       turn on the init_upstart boolean. Enabled by default.
152
153       setsebool -P init_upstart 1
154
155
156
157       If  you  want to allow confined applications to use nscd shared memory,
158       you must turn on the nscd_use_shm boolean. Enabled by default.
159
160       setsebool -P nscd_use_shm 1
161
162
163

PORT TYPES

165       SELinux defines port types to represent TCP and UDP ports.
166
167       You can see the types associated with a port  by  using  the  following
168       command:
169
170       semanage port -l
171
172
173       Policy  governs  the  access  confined  processes  have to these ports.
174       SELinux squid policy is very flexible allowing  users  to  setup  their
175       squid processes in as secure a method as possible.
176
177       The following port types are defined for squid:
178
179
180       squid_port_t
181
182
183
184       Default Defined Ports:
185                 tcp 3401,4827
186                 udp 3401,4827
187

MANAGED FILES

189       The SELinux process type squid_t can manage files labeled with the fol‐
190       lowing file types.  The paths listed are the default  paths  for  these
191       file types.  Note the processes UID still need to have DAC permissions.
192
193       cluster_conf_t
194
195            /etc/cluster(/.*)?
196
197       cluster_var_lib_t
198
199            /var/lib(64)?/openais(/.*)?
200            /var/lib(64)?/pengine(/.*)?
201            /var/lib(64)?/corosync(/.*)?
202            /usr/lib(64)?/heartbeat(/.*)?
203            /var/lib(64)?/heartbeat(/.*)?
204            /var/lib(64)?/pacemaker(/.*)?
205            /var/lib/cluster(/.*)?
206
207       cluster_var_run_t
208
209            /var/run/crm(/.*)?
210            /var/run/cman_.*
211            /var/run/rsctmp(/.*)?
212            /var/run/aisexec.*
213            /var/run/heartbeat(/.*)?
214            /var/run/cpglockd.pid
215            /var/run/corosync.pid
216            /var/run/rgmanager.pid
217            /var/run/cluster/rgmanager.sk
218
219       faillog_t
220
221            /var/log/btmp.*
222            /var/log/faillog.*
223            /var/log/tallylog.*
224            /var/run/faillock(/.*)?
225
226       initrc_tmp_t
227
228
229       krb5_host_rcache_t
230
231            /var/cache/krb5rcache(/.*)?
232            /var/tmp/host_0
233            /var/tmp/HTTP_23
234
235       mnt_t
236
237            /mnt(/[^/]*)
238            /mnt(/[^/]*)?
239            /rhev(/[^/]*)?
240            /media(/[^/]*)
241            /media(/[^/]*)?
242            /etc/rhgb(/.*)?
243            /media/.hal-.*
244            /net
245            /afs
246            /rhev
247            /misc
248
249       pcscd_var_run_t
250
251            /var/run/pcscd.events(/.*)?
252            /var/run/pcscd.pid
253            /var/run/pcscd.pub
254            /var/run/pcscd.comm
255
256       root_t
257
258            /
259            /initrd
260
261       security_t
262
263
264       squid_cache_t
265
266            /var/squidGuard(/.*)?
267            /var/cache/squid(/.*)?
268            /var/spool/squid(/.*)?
269
270       squid_log_t
271
272            /var/log/squid(/.*)?
273            /var/log/squidGuard(/.*)?
274
275       squid_var_run_t
276
277            /var/run/squid.*
278
279       tmp_t
280
281            /tmp
282            /usr/tmp
283            /var/tmp
284            /tmp-inst
285            /var/tmp-inst
286            /var/tmp/vi.recover
287
288       tmpfs_t
289
290            /dev/shm
291
292

FILE CONTEXTS

294       SELinux requires files to have an extended attribute to define the file
295       type.
296
297       You can see the context of a file using the -Z option to ls
298
299       Policy governs the access  confined  processes  have  to  these  files.
300       SELinux  squid  policy  is  very flexible allowing users to setup their
301       squid processes in as secure a method as possible.
302
303       EQUIVALENCE DIRECTORIES
304
305
306       squid policy stores data with multiple  different  file  context  types
307       under  the  /var/log/squid  directory.   If you would like to store the
308       data in a different directory you can use the semanage command to  cre‐
309       ate an equivalence mapping.  If you wanted to store this data under the
310       /srv dirctory you would execute the following command:
311
312       semanage fcontext -a -e /var/log/squid /srv/squid
313       restorecon -R -v /srv/squid
314
315       STANDARD FILE CONTEXT
316
317       SELinux defines the file context types for the squid, if you wanted  to
318       store  files  with  these types in a diffent paths, you need to execute
319       the semanage command  to  sepecify  alternate  labeling  and  then  use
320       restorecon to put the labels on disk.
321
322       semanage fcontext -a -t squid_var_run_t '/srv/mysquid_content(/.*)?'
323       restorecon -R -v /srv/mysquid_content
324
325       Note:  SELinux  often  uses  regular expressions to specify labels that
326       match multiple files.
327
328       The following file types are defined for squid:
329
330
331
332       squid_cache_t
333
334       - Set files with the squid_cache_t type, if you want to store the files
335       under the /var/cache directory.
336
337
338       Paths:
339            /var/squidGuard(/.*)?,                     /var/cache/squid(/.*)?,
340            /var/spool/squid(/.*)?
341
342
343       squid_conf_t
344
345       - Set files with the squid_conf_t type, if you want to treat the  files
346       as squid configuration data, usually stored under the /etc directory.
347
348
349       Paths:
350            /etc/squid(/.*)?, /usr/share/squid(/.*)?
351
352
353       squid_exec_t
354
355       -  Set  files  with the squid_exec_t type, if you want to transition an
356       executable to the squid_t domain.
357
358
359
360       squid_initrc_exec_t
361
362       - Set files with the squid_initrc_exec_t type, if you want  to  transi‐
363       tion an executable to the squid_initrc_t domain.
364
365
366
367       squid_log_t
368
369       - Set files with the squid_log_t type, if you want to treat the data as
370       squid log data, usually stored under the /var/log directory.
371
372
373       Paths:
374            /var/log/squid(/.*)?, /var/log/squidGuard(/.*)?
375
376
377       squid_var_run_t
378
379       - Set files with the squid_var_run_t type, if you  want  to  store  the
380       squid files under the /run or /var/run directory.
381
382
383
384       Note:  File context can be temporarily modified with the chcon command.
385       If you want to permanently change the file context you need to use  the
386       semanage fcontext command.  This will modify the SELinux labeling data‐
387       base.  You will need to use restorecon to apply the labels.
388
389

COMMANDS

391       semanage fcontext can also be used to manipulate default  file  context
392       mappings.
393
394       semanage  permissive  can  also  be used to manipulate whether or not a
395       process type is permissive.
396
397       semanage module can also be used to enable/disable/install/remove  pol‐
398       icy modules.
399
400       semanage port can also be used to manipulate the port definitions
401
402       semanage boolean can also be used to manipulate the booleans
403
404
405       system-config-selinux is a GUI tool available to customize SELinux pol‐
406       icy settings.
407
408

AUTHOR

410       This manual page was auto-generated using sepolicy manpage .
411
412