nslcd_selinux(8)

💅 nslcd_selinux(8) — the SELinux tea for nslcd 🫶

okay so bestie, this is the manual page nslcd_selinux(8) from the nslcd section 8 pages, and it's literally all about the SELinux policy for the nslcd processes. pull up a chair, we're gonna get into it ✨

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🌸 NAME 🌸

nslcd_selinux — the Security Enhanced Linux Policy for the nslcd processes. that's it, that's the whole vibe check 💅

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✨ DESCRIPTION ✨

Security-Enhanced Linux secures the nslcd processes via flexible mandatory access control. iconic behavior honestly 👑

The nslcd processes execute with the nslcd_t SELinux type. and like, you can totally check if you have these processes running by executing the ps command with the -Z qualifier. fr fr.

For example:

ps -eZ | grep nslcd_t

go ahead bestie, run it, i'll wait 💖

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🚪 ENTRYPOINTS 🚪

The nslcd_t SELinux type can be entered via the nslcd_exec_t file type. that's the doorway, the main character entrance if you will 🎀

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

/usr/bin/nslcd

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👯 PROCESS TYPES 👯

SELinux defines process types (domains) for each process running on the system. yes, every single one gets a lil label, we love an organized queen 🌈

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

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

The following process types are defined for nslcd:

nslcd_t

Note: semanage permissive -a nslcd_t can be used to make the process type nslcd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's chill but it's still snitching to the logs 😭 not me reading the audit trail

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🔘 BOOLEANS 🔘

SELinux policy is customizable based on least access required. nslcd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run nslcd with the tightest access possible. tightest access = the outfit that fits just right 🎀

If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 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 allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

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📂 MANAGED FILES 📂

The SELinux process type nslcd_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. like, SELinux isn't gonna override your regular perms, she's just an extra layer 💅

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

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

cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

nslcd_var_run_t

/run/nslcd(/.*)?

root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

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🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type. yes, files have lil name tags, it's giving kindergarten field trip 🎀

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 nslcd policy is very flexible allowing users to setup their nslcd processes in as secure a method as possible. (yes she said that twice, she means it 💅)

🌟 STANDARD FILE CONTEXT 🌟

SELinux defines the file context types for the nslcd, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. ok so, move the files first, then relabel, got it bestie ✨

semanage fcontext -a -t nslcd_exec_t '/srv/nslcd/content(/.*)?'
restorecon -R -v /srv/mynslcd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙈

The following file types are defined for nslcd:

• nslcd_conf_t — Set files with the nslcd_conf_t type, if you want to treat the files as nslcd configuration data, usually stored under the /etc directory.
• nslcd_exec_t — Set files with the nslcd_exec_t type, if you want to transition an executable to the nslcd_t domain.
• nslcd_initrc_exec_t — Set files with the nslcd_initrc_exec_t type, if you want to transition an executable to the nslcd_initrc_t domain.
• nslcd_var_run_t — Set files with the nslcd_var_run_t type, if you want to store the nslcd 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. so chcon = temporary tattoo, semanage fcontext = actual permanent ink, and restorecon is the artist applying it 🎀💖

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🛠️ COMMANDS 🛠️

<pink>semanage fcontext</pink> can also be used to manipulate default file context mappings.

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

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

<pink>semanage boolean</pink> can also be used to manipulate the booleans

<pink>system-config-selinux</pink> is a GUI tool available to customize SELinux policy settings. ooh, clicky clicky bestie 🖱️✨

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👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage . (yes the robot wrote it, and she ate 💅)

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🦋 SEE ALSO 🦋

selinux(8), nslcd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

go read those next, iykyk 📚💖

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and that's the whole page bestie!! 🌈✨

this lil masterpiece is from nslcd, dated 26-10-06, and it's nslcd_selinux(8) — so yeah, that's the source, the version, and the date all in one cute lil bow 🎀 mwah, go forth and label responsibly 💜🫶