sshd_auth_selinux(8)

💖 NAME 💖

Okay bestie, gather round — sshd_auth_selinux is literally the Security Enhanced Linux Policy for the sshd_auth processes. That's it, that's the name. Slay.

✨ DESCRIPTION ✨

So Security-Enhanced Linux secures the sshd_auth processes via flexible mandatory access control. Iconic behavior, honestly.

The sshd_auth processes execute with the sshd_auth_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 sshd_auth_t

Periodt. That's how you vibe check your own processes.

🦋 ENTRYPOINTS 🦋

The sshd_auth_t SELinux type can be entered via the sshd_auth_exec_t file type. Like, that's the doorway, iykyk.

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

/usr/libexec/(open)?ssh/sshd-auth

🎀 PROCESS TYPES 🎀

SELinux defines process types (domains) for each process running on the system. Yes bestie, every single one.

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

Policy governs the access confined processes have to files. SELinux sshd_auth policy is very flexible allowing users to setup their sshd_auth processes in as secure a method as possible. We love flexible AND secure, no cap.

The following process types are defined for sshd_auth:

• sshd_auth_t

Note: semanage permissive -a sshd_auth_t can be used to make the process type sshd_auth_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, permissive doesn't mean invisible — the receipts still show up 😭.

🌈 BOOLEANS 🌈

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

• fips_mode — 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

• nis_enabled — 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

🍓 MANAGED FILES 🍓

The SELinux process type sshd_auth_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 — SELinux isn't out here doing everything for you, bestie.

• 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

💅 FILE CONTEXTS 💅

SELinux requires files to have an extended attribute to define the file type. Like a little name tag but for security, cute.

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 sshd_auth policy is very flexible allowing users to setup their sshd_auth processes in as secure a method as possible. Yes we're saying it again because it's true.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the sshd_auth, 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.

semanage fcontext -a -t sshd_auth_exec_t '/srv/sshd_auth/content(/.*)?'
restorecon -R -v /srv/mysshd_auth_content

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

The following file types are defined for sshd_auth:

• sshd_auth_exec_t — set files with the sshd_auth_exec_t type, if you want to transition an executable to the sshd_auth_t domain.

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 like, chcon is the temporary tattoo and semanage fcontext + restorecon is the real one 🫶.

👑 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. A bot wrote this, and honestly? It ate.

🔥 SEE ALSO 🔥

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

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And that's the whole page bestie! This one is the sshd_auth manual, dated 26-10-06, and it's the sshd_auth_selinux(8) page — go be iconic with your policy 💅✨