snmpd_selinux(8)

1snmpd_selinux(8)             SELinux Policy snmpd             snmpd_selinux(8)
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NAME

6       snmpd_selinux - Security Enhanced Linux Policy for the snmpd processes
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DESCRIPTION

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

ENTRYPOINTS

23       The snmpd_t SELinux type can be entered via the snmpd_exec_t file type.
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25       The default entrypoint paths for the snmpd_t domain are the following:
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27       /usr/sbin/snmpd, /usr/sbin/snmptrapd
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PROCESS TYPES

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

BOOLEANS

50       SELinux policy is customizable based on least access  required.   snmpd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run snmpd with the tightest access possible.
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55
56       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
60       setsebool -P authlogin_nsswitch_use_ldap 1
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62
63
64       If you want to allow all daemons to write corefiles to /, you must turn
65       on the daemons_dump_core boolean. Disabled by default.
66
67       setsebool -P daemons_dump_core 1
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70
71       If  you  want  to enable cluster mode for daemons, you must turn on the
72       daemons_enable_cluster_mode boolean. Enabled by default.
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74       setsebool -P daemons_enable_cluster_mode 1
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76
77
78       If you want to allow all daemons to use tcp wrappers, you must turn  on
79       the daemons_use_tcp_wrapper boolean. Disabled by default.
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81       setsebool -P daemons_use_tcp_wrapper 1
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84
85       If  you  want to allow all daemons the ability to read/write terminals,
86       you must turn on the daemons_use_tty boolean. Disabled by default.
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88       setsebool -P daemons_use_tty 1
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91
92       If you want to deny any process from ptracing or  debugging  any  other
93       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
94       default.
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96       setsebool -P deny_ptrace 1
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100       If you want to allow any process  to  mmap  any  file  on  system  with
101       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
102       ean. Enabled by default.
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104       setsebool -P domain_can_mmap_files 1
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107
108       If you want to allow all domains write to kmsg_device, while kernel  is
109       executed  with  systemd.log_target=kmsg parameter, you must turn on the
110       domain_can_write_kmsg boolean. Disabled by default.
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112       setsebool -P domain_can_write_kmsg 1
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115
116       If you want to allow all domains to use other domains file descriptors,
117       you must turn on the domain_fd_use boolean. Enabled by default.
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119       setsebool -P domain_fd_use 1
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122
123       If  you  want to allow all domains to have the kernel load modules, you
124       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
125       default.
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127       setsebool -P domain_kernel_load_modules 1
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130
131       If you want to allow all domains to execute in fips_mode, you must turn
132       on the fips_mode boolean. Enabled by default.
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134       setsebool -P fips_mode 1
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137
138       If you want to enable reading of urandom for all domains, you must turn
139       on the global_ssp boolean. Disabled by default.
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141       setsebool -P global_ssp 1
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144
145       If  you  want  to allow confined applications to run with kerberos, you
146       must turn on the kerberos_enabled boolean. Enabled by default.
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148       setsebool -P kerberos_enabled 1
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151
152       If you want to allow system to run with  NIS,  you  must  turn  on  the
153       nis_enabled boolean. Disabled by default.
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155       setsebool -P nis_enabled 1
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158
159       If  you  want to allow confined applications to use nscd shared memory,
160       you must turn on the nscd_use_shm boolean. Disabled by default.
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162       setsebool -P nscd_use_shm 1
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165

PORT TYPES

167       SELinux defines port types to represent TCP and UDP ports.
168
169       You can see the types associated with a port  by  using  the  following
170       command:
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172       semanage port -l
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174
175       Policy  governs  the  access  confined  processes  have to these ports.
176       SELinux snmpd policy is very flexible allowing  users  to  setup  their
177       snmpd processes in as secure a method as possible.
178
179       The following port types are defined for snmpd:
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181
182       snmp_port_t
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186       Default Defined Ports:
187                 tcp 199,1161,161-162
188                 udp 161-162
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MANAGED FILES

191       The SELinux process type snmpd_t can manage files labeled with the fol‐
192       lowing file types.  The paths listed are the default  paths  for  these
193       file types.  Note the processes UID still need to have DAC permissions.
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195       cluster_conf_t
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197            /etc/cluster(/.*)?
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199       cluster_var_lib_t
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201            /var/lib/pcsd(/.*)?
202            /var/lib/cluster(/.*)?
203            /var/lib/openais(/.*)?
204            /var/lib/pengine(/.*)?
205            /var/lib/corosync(/.*)?
206            /usr/lib/heartbeat(/.*)?
207            /var/lib/heartbeat(/.*)?
208            /var/lib/pacemaker(/.*)?
209
210       cluster_var_run_t
211
212            /var/run/crm(/.*)?
213            /var/run/cman_.*
214            /var/run/rsctmp(/.*)?
215            /var/run/aisexec.*
216            /var/run/heartbeat(/.*)?
217            /var/run/corosync-qnetd(/.*)?
218            /var/run/corosync-qdevice(/.*)?
219            /var/run/cpglockd.pid
220            /var/run/corosync.pid
221            /var/run/rgmanager.pid
222            /var/run/cluster/rgmanager.sk
223
224       root_t
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226            /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
227            /
228            /initrd
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230       snmpd_log_t
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232            /var/log/snmpd.log.*
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234       snmpd_var_lib_t
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236            /var/agentx(/.*)?
237            /var/net-snmp(/.*)
238            /var/lib/snmp(/.*)?
239            /var/net-snmp(/.*)?
240            /var/lib/net-snmp(/.*)?
241            /var/spool/snmptt(/.*)?
242            /usr/share/snmp/mibs/.index
243
244       snmpd_var_run_t
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246            /var/run/snmpd(/.*)?
247            /var/run/net-snmp(/.*)?
248            /var/run/snmpd.pid
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250

FILE CONTEXTS

252       SELinux requires files to have an extended attribute to define the file
253       type.
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255       You can see the context of a file using the -Z option to ls
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257       Policy governs the access  confined  processes  have  to  these  files.
258       SELinux  snmpd  policy  is  very flexible allowing users to setup their
259       snmpd processes in as secure a method as possible.
260
261       EQUIVALENCE DIRECTORIES
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263
264       snmpd policy stores data with multiple  different  file  context  types
265       under  the  /var/run/snmpd  directory.   If you would like to store the
266       data in a different directory you can use the semanage command to  cre‐
267       ate an equivalence mapping.  If you wanted to store this data under the
268       /srv dirctory you would execute the following command:
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270       semanage fcontext -a -e /var/run/snmpd /srv/snmpd
271       restorecon -R -v /srv/snmpd
272
273       STANDARD FILE CONTEXT
274
275       SELinux defines the file context types for the snmpd, if you wanted  to
276       store  files  with  these types in a diffent paths, you need to execute
277       the semanage command  to  sepecify  alternate  labeling  and  then  use
278       restorecon to put the labels on disk.
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280       semanage fcontext -a -t snmpd_var_run_t '/srv/mysnmpd_content(/.*)?'
281       restorecon -R -v /srv/mysnmpd_content
282
283       Note:  SELinux  often  uses  regular expressions to specify labels that
284       match multiple files.
285
286       The following file types are defined for snmpd:
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289
290       snmpd_exec_t
291
292       - Set files with the snmpd_exec_t type, if you want  to  transition  an
293       executable to the snmpd_t domain.
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295
296       Paths:
297            /usr/sbin/snmpd, /usr/sbin/snmptrapd
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299
300       snmpd_initrc_exec_t
301
302       -  Set  files with the snmpd_initrc_exec_t type, if you want to transi‐
303       tion an executable to the snmpd_initrc_t domain.
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307       snmpd_log_t
308
309       - Set files with the snmpd_log_t type, if you want to treat the data as
310       snmpd log data, usually stored under the /var/log directory.
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313
314       snmpd_var_lib_t
315
316       -  Set  files  with  the snmpd_var_lib_t type, if you want to store the
317       snmpd files under the /var/lib directory.
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319
320       Paths:
321            /var/agentx(/.*)?,    /var/net-snmp(/.*),     /var/lib/snmp(/.*)?,
322            /var/net-snmp(/.*)?,                      /var/lib/net-snmp(/.*)?,
323            /var/spool/snmptt(/.*)?, /usr/share/snmp/mibs/.index
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325
326       snmpd_var_run_t
327
328       - Set files with the snmpd_var_run_t type, if you  want  to  store  the
329       snmpd files under the /run or /var/run directory.
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331
332       Paths:
333            /var/run/snmpd(/.*)?, /var/run/net-snmp(/.*)?, /var/run/snmpd.pid
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335
336       Note:  File context can be temporarily modified with the chcon command.
337       If you want to permanently change the file context you need to use  the
338       semanage fcontext command.  This will modify the SELinux labeling data‐
339       base.  You will need to use restorecon to apply the labels.
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COMMANDS

343       semanage fcontext can also be used to manipulate default  file  context
344       mappings.
345
346       semanage  permissive  can  also  be used to manipulate whether or not a
347       process type is permissive.
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349       semanage module can also be used to enable/disable/install/remove  pol‐
350       icy modules.
351
352       semanage port can also be used to manipulate the port definitions
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354       semanage boolean can also be used to manipulate the booleans
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356
357       system-config-selinux is a GUI tool available to customize SELinux pol‐
358       icy settings.
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360

AUTHOR

362       This manual page was auto-generated using sepolicy manpage .
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