NAME¶

nagios_selinux - Security Enhanced Linux Policy for the nagios processes

DESCRIPTION¶

Security-Enhanced Linux secures the nagios processes via flexible mandatory access control.

The nagios processes execute with the nagios_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep nagios_t

ENTRYPOINTS¶

The nagios_t SELinux type can be entered via the nagios_exec_t file type.

The default entrypoint paths for the nagios_t domain are the following:

/usr/s?bin/nagios

PROCESS TYPES¶

SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to ps

Policy governs the access confined processes have to files. SELinux nagios policy is very flexible allowing users to setup their nagios processes in as secure a method as possible.

The following process types are defined for nagios:

nagios_t, nagios_mail_plugin_t, nagios_checkdisk_plugin_t, nagios_services_plugin_t, nagios_eventhandler_plugin_t, nagios_system_plugin_t, nagios_unconfined_plugin_t, nagios_admin_plugin_t

Note: semanage permissive -a nagios_t can be used to make the process type nagios_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS¶

SELinux policy is customizable based on least access required. nagios policy is extremely flexible and has several booleans that allow you to manipulate the policy and run nagios with the tightest access possible.

If you want to allow nagios/nrpe to call sudo from NRPE utils scripts, you must turn on the nagios_run_sudo boolean. Disabled by default.

setsebool -P nagios_run_sudo 1

If you want to allow all daemons to write corefiles to /, you must turn on the allow_daemons_dump_core boolean. Disabled by default.

setsebool -P allow_daemons_dump_core 1

If you want to allow all daemons to use tcp wrappers, you must turn on the allow_daemons_use_tcp_wrapper boolean. Disabled by default.

setsebool -P allow_daemons_use_tcp_wrapper 1

If you want to allow all daemons the ability to read/write terminals, you must turn on the allow_daemons_use_tty boolean. Disabled by default.

setsebool -P allow_daemons_use_tty 1

If you want to allow all domains to use other domains file descriptors, you must turn on the allow_domain_fd_use boolean. Enabled by default.

setsebool -P allow_domain_fd_use 1

If you want to allow confined applications to run with kerberos, you must turn on the allow_kerberos boolean. Enabled by default.

setsebool -P allow_kerberos 1

If you want to allow sysadm to debug or ptrace all processes, you must turn on the allow_ptrace boolean. Disabled by default.

setsebool -P allow_ptrace 1

If you want to allow system to run with NIS, you must turn on the allow_ypbind boolean. Disabled by default.

setsebool -P allow_ypbind 1

If you want to enable cluster mode for daemons, you must turn on the daemons_enable_cluster_mode boolean. Disabled by default.

setsebool -P daemons_enable_cluster_mode 1

If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by default.

setsebool -P domain_kernel_load_modules 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

setsebool -P global_ssp 1

If you want to enable support for upstart as the init program, you must turn on the init_upstart boolean. Enabled by default.

setsebool -P init_upstart 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

MANAGED FILES¶

The SELinux process type nagios_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

/var/lib(64)?/openais(/.*)?
/var/lib(64)?/pengine(/.*)?
/var/lib(64)?/corosync(/.*)?
/usr/lib(64)?/heartbeat(/.*)?
/var/lib(64)?/heartbeat(/.*)?
/var/lib(64)?/pacemaker(/.*)?
/var/lib/cluster(/.*)?

cluster_var_run_t

/var/run/crm(/.*)?
/var/run/cman_.*
/var/run/rsctmp(/.*)?
/var/run/aisexec.*
/var/run/heartbeat(/.*)?
/var/run/cpglockd.pid
/var/run/corosync.pid
/var/run/rgmanager.pid
/var/run/cluster/rgmanager.sk

faillog_t

/var/log/btmp.*
/var/log/faillog.*
/var/log/tallylog.*
/var/run/faillock(/.*)?

initrc_tmp_t

lastlog_t

/var/log/lastlog.*

mnt_t

/mnt(/[^/]*)
/mnt(/[^/]*)?
/rhev(/[^/]*)?
/media(/[^/]*)
/media(/[^/]*)?
/etc/rhgb(/.*)?
/media/.hal-.*
/net
/afs
/rhev
/misc

nagios_log_t

/var/log/nagios(/.*)?
/var/log/netsaint(/.*)?
/var/log/pnp4nagios(/.*)?

nagios_spool_t

/var/spool/nagios(/.*)?

nagios_tmp_t

nagios_var_lib_t

/var/lib/pnp4nagios(/.*)?
/usr/lib/pnp4nagios(/.*)?

nagios_var_run_t

/var/run/nagios.*

root_t

/
/initrd

security_t

sudo_db_t

/var/db/sudo(/.*)?

tmp_t

/tmp
/usr/tmp
/var/tmp
/tmp-inst
/var/tmp-inst
/var/tmp/vi.recover

FILE CONTEXTS¶

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls

Policy governs the access confined processes have to these files. SELinux nagios policy is very flexible allowing users to setup their nagios processes in as secure a method as possible.

STANDARD FILE CONTEXT

SELinux defines the file context types for the nagios, if you wanted to store files with these types in a diffent paths, you need to execute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t nagios_var_run_t '/srv/mynagios_content(/.*)?'
restorecon -R -v /srv/mynagios_content

Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for nagios:

nagios_admin_plugin_exec_t

- Set files with the nagios_admin_plugin_exec_t type, if you want to transition an executable to the nagios_admin_plugin_t domain.

nagios_checkdisk_plugin_exec_t

- Set files with the nagios_checkdisk_plugin_exec_t type, if you want to transition an executable to the nagios_checkdisk_plugin_t domain.

Paths:: /usr/lib(64)?/nagios/plugins/check_disk, /usr/lib(64)?/nagios/plugins/check_disk_smb, /usr/lib(64)?/nagios/plugins/check_ide_smart, /usr/lib(64)?/nagios/plugins/check_linux_raid

nagios_etc_t

- Set files with the nagios_etc_t type, if you want to store nagios files in the /etc directories.

Paths:: /etc/nagios(/.*)?, /etc/pnp4nagios(/.*)?

nagios_eventhandler_plugin_exec_t

- Set files with the nagios_eventhandler_plugin_exec_t type, if you want to transition an executable to the nagios_eventhandler_plugin_t domain.

nagios_eventhandler_plugin_tmp_t

- Set files with the nagios_eventhandler_plugin_tmp_t type, if you want to store nagios eventhandler plugin temporary files in the /tmp directories.

nagios_exec_t

- Set files with the nagios_exec_t type, if you want to transition an executable to the nagios_t domain.

nagios_initrc_exec_t

- Set files with the nagios_initrc_exec_t type, if you want to transition an executable to the nagios_initrc_t domain.

Paths:: /etc/rc.d/init.d/nrpe, /etc/rc.d/init.d/nagios

nagios_log_t

- Set files with the nagios_log_t type, if you want to treat the data as nagios log data, usually stored under the /var/log directory.

Paths:: /var/log/nagios(/.*)?, /var/log/netsaint(/.*)?, /var/log/pnp4nagios(/.*)?

nagios_mail_plugin_exec_t

- Set files with the nagios_mail_plugin_exec_t type, if you want to transition an executable to the nagios_mail_plugin_t domain.

nagios_services_plugin_exec_t

- Set files with the nagios_services_plugin_exec_t type, if you want to transition an executable to the nagios_services_plugin_t domain.

Paths:: /usr/lib(64)?/nagios/plugins/check_nt, /usr/lib(64)?/nagios/plugins/check_dig, /usr/lib(64)?/nagios/plugins/check_dns, /usr/lib(64)?/nagios/plugins/check_rpc, /usr/lib(64)?/nagios/plugins/check_tcp, /usr/lib(64)?/nagios/plugins/check_sip, /usr/lib(64)?/nagios/plugins/check_ssh, /usr/lib(64)?/nagios/plugins/check_ups, /usr/lib(64)?/nagios/plugins/check_dhcp, /usr/lib(64)?/nagios/plugins/check_game, /usr/lib(64)?/nagios/plugins/check_hpjd, /usr/lib(64)?/nagios/plugins/check_http, /usr/lib(64)?/nagios/plugins/check_icmp, /usr/lib(64)?/nagios/plugins/check_ircd, /usr/lib(64)?/nagios/plugins/check_ldap, /usr/lib(64)?/nagios/plugins/check_nrpe, /usr/lib(64)?/nagios/plugins/check_ping, /usr/lib(64)?/nagios/plugins/check_real, /usr/lib(64)?/nagios/plugins/check_time, /usr/lib(64)?/nagios/plugins/check_smtp, /usr/lib(64)?/nagios/plugins/check_dummy, /usr/lib(64)?/nagios/plugins/check_fping, /usr/lib(64)?/nagios/plugins/check_mysql, /usr/lib(64)?/nagios/plugins/check_ntp.*, /usr/lib(64)?/nagios/plugins/check_pgsql, /usr/lib(64)?/nagios/plugins/check_breeze, /usr/lib(64)?/nagios/plugins/check_oracle, /usr/lib(64)?/nagios/plugins/check_radius, /usr/lib(64)?/nagios/plugins/check_snmp.*, /usr/lib(64)?/nagios/plugins/check_cluster, /usr/lib(64)?/nagios/plugins/check_mysql_query

nagios_spool_t

- Set files with the nagios_spool_t type, if you want to store the nagios files under the /var/spool directory.

nagios_system_plugin_exec_t

- Set files with the nagios_system_plugin_exec_t type, if you want to transition an executable to the nagios_system_plugin_t domain.

Paths:: /usr/lib(64)?/nagios/plugins/check_log, /usr/lib(64)?/nagios/plugins/check_load, /usr/lib(64)?/nagios/plugins/check_mrtg, /usr/lib(64)?/nagios/plugins/check_swap, /usr/lib(64)?/nagios/plugins/check_wave, /usr/lib(64)?/nagios/plugins/check_procs, /usr/lib(64)?/nagios/plugins/check_users, /usr/lib(64)?/nagios/plugins/check_flexlm, /usr/lib(64)?/nagios/plugins/check_nagios, /usr/lib(64)?/nagios/plugins/check_nwstat, /usr/lib(64)?/nagios/plugins/check_overcr, /usr/lib(64)?/nagios/plugins/check_sensors, /usr/lib(64)?/nagios/plugins/check_ifstatus, /usr/lib(64)?/nagios/plugins/check_mrtgtraf, /usr/lib(64)?/nagios/plugins/check_ifoperstatus

nagios_system_plugin_tmp_t

- Set files with the nagios_system_plugin_tmp_t type, if you want to store nagios system plugin temporary files in the /tmp directories.

nagios_tmp_t

- Set files with the nagios_tmp_t type, if you want to store nagios temporary files in the /tmp directories.

nagios_unconfined_plugin_exec_t

- Set files with the nagios_unconfined_plugin_exec_t type, if you want to transition an executable to the nagios_unconfined_plugin_t domain.

nagios_var_lib_t

- Set files with the nagios_var_lib_t type, if you want to store the nagios files under the /var/lib directory.

Paths:: /var/lib/pnp4nagios(/.*)?, /usr/lib/pnp4nagios(/.*)?

nagios_var_run_t

- Set files with the nagios_var_run_t type, if you want to store the nagios files under the /run or /var/run directory.

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.

COMMANDS¶

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR¶

This manual page was auto-generated using sepolicy manpage .

Source file:	nagios_selinux.8.en.gz (from selinux-policy-doc 3.7.19-312.el6)
Source last updated:	2018-06-21 21:37:13
Converted to HTML:	2024-06-22 22:06:01