postfix_showq_selinux(8)

💅 postfix_showq_selinux(8) — the SELinux glow-up for postfix_showq

okay bestie, so this is the postfix_showq_selinux page from the SELinux Policy postfix_showq manual, and it's basically the whole vibe check for how SELinux babysits your postfix_showq processes. no cap, it's actually so useful. let's get into it ✨

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🎀 NAME

postfix_showq_selinux — Security Enhanced Linux Policy for the postfix_showq processes. that's it, that's the name. iconic.

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🌸 DESCRIPTION

Security-Enhanced Linux secures the postfix_showq processes via flexible mandatory access control. like, SELinux is the friend who checks your outfit before you leave the house, except the outfit is syscalls. 🫶

The postfix_showq processes execute with the postfix_showq_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 postfix_showq_t

literally just run it, bestie. the -Z is the makeup filter that shows you the labels. 🦋

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🚪 ENTRYPOINTS

The postfix_showq_t SELinux type can be entered via the postfix_showq_exec_t file type.

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

/usr/libexec/postfix/showq

that's the door. one door. walk through it and you're in the postfix_showq_t domain. main character energy fr fr. 👑

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🧚 PROCESS TYPES

SELinux defines process types (domains) for each process running on the system. one domain per little guy. so organized.

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

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

The following process types are defined for postfix_showq:

• postfix_showq_t

Note: semanage permissive -a postfix_showq_t can be used to make the process type postfix_showq_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it's like, you're not grounded anymore, but your mom is still taking notes. 😭

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🍓 BOOLEANS

SELinux policy is customizable based on least access required. postfix_showq policy is extremely flexible and has several booleans that allow you to manipulate the policy and run postfix_showq with the tightest access possible. tighten it like a corset, bestie. 💜

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

the -P is doing the heavy lifting so your choice actually persists across reboots. slay. ✨

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📁 MANAGED FILES

The SELinux process type postfix_showq_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 overriding regular permissions, it's an extra layer. ykyk. 🔥

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

postfix_var_run_t

/var/spool/postfix/pid/.*

look at all those paths. so many little homes. 🏠

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🦋 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. yes, -Z again. it's the same trick, different command. versatile icon. 💅

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

⭐ STANDARD FILE CONTEXT

SELinux defines the file context types for the postfix_showq, 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 postfix_showq_exec_t '/srv/postfix_showq/content(/.*)?'
restorecon -R -v /srv/mypostfix_showq_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex my beloved. 🎀

The following file types are defined for postfix_showq:

postfix_showq_exec_t

• Set files with the postfix_showq_exec_t type, if you want to transition an executable to the postfix_showq_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 a temp tattoo, semanage fcontext is the real piercing. choose wisely. 😭

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🛠️ 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.

yes bestie, there's even a GUI. point and click era. 🖱️✨

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👑 AUTHOR

This manual page was auto-generated using sepolicy manpage. auto-generated and still ate. 💀

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🌈 SEE ALSO

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

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and that's the whole page, bestie!! go forth and label responsibly 🫶💖

okay so final little sign-off: this was postfix_showq from postfix_showq_selinux(8), dated 26-10-06 🌸 — go be secure, mwah 💋