sslh_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

💖 sslh_selinux — the SELinux glow-up for sslh ✨

Okay bestie, so like, this is the sslh_selinux(8) manual page — the SELinux policy situation for all your sslh processes. Yes, we're getting into mandatory access control, but like, in a cute way. Stay with me, it's gonna slay. 💅

🌸 NAME 🌸

sslh_selinux — Security Enhanced Linux Policy for the sslh processes, periodt.

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the sslh processes via flexible mandatory access control. It's giving "I'm watching you, but lovingly." 🔥

The sslh processes execute with the sslh_t SELinux type. Wanna check if you've got these processes running? Run the ps command with the -Z qualifier, like:

ps -eZ | grep sslh_t

That's it. That's the vibe check. 💖

✨ ENTRYPOINTS ✨

So the sslh_t SELinux type can be entered via the sslh_exec_t file type. Iconic, honestly.

The default entrypoint paths for the sslh_t domain are literally:

/usr/bin/sslh, /usr/bin/sslh-select

No cap, that's the whole list. 🎀

👑 PROCESS TYPES 👑

SELinux defines process types (aka domains) for each process running on the system. Very organized of it. 💅

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

Policy governs the access confined processes have to files. SELinux sslh policy is very flexible, allowing users to setup their sslh processes in as secure a method as possible. Main character energy for security. 🛡️

The following process types are defined for sslh:

sslh_t

Note: semanage permissive -a sslh_t can be used to make the process type sslh_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So it's still snitching, just letting you pass. 🫶

💖 BOOLEANS 💖

SELinux policy is customizable based on least access required. The sslh policy is extremely flexible (the way it stays customizable 😭) and has several booleans that allow you to manipulate the policy and run sslh with the tightest access possible. Lowkey obsessed with this.

  • If you want to determine whether sslh can listen on any tcp port or if it is restricted to the standard http, you must turn on the sslh_can_bind_any_port boolean. Disabled by default.
setsebool -P sslh_can_bind_any_port 1
  • If you want to determine whether sslh can connect to any tcp port or if it is restricted to the standard http, openvpn and jabber ports, you must turn on the sslh_can_connect_any_port boolean. Disabled by default.
setsebool -P sslh_can_connect_any_port 1
  • 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 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 sslh_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note: the process's UID still needs to have DAC permissions. So like, SELinux isn't doing all the work, your UID's gotta pull its weight too. 😭

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

root_t

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

sslh_var_run_t

/run/sslh.*

🦋 FILE CONTEXTS 🦋

SELinux requires files to have an extended attribute to define the file type. It's all about the labels, bestie. 🏷️

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

Policy governs the access confined processes have to these files. SELinux sslh policy is very flexible allowing users to setup their sslh processes in as secure a method as possible. We love flexibility that doesn't compromise security. 💜

🌈 STANDARD FILE CONTEXT 🌈

SELinux defines the file context types for the sslh. 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. Like this:

semanage fcontext -a -t sslh_exec_t '/srv/sslh/content(/.*)?'
restorecon -R -v /srv/mysslh_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. Regex girlies rise. 🧚

The following file types are defined for sslh:

sslh_config_t

  • Set files with the sslh_config_t type, if you want to treat the files as sslh configuration data, usually stored under the /etc directory.

Paths:

/etc/sslh(/.*)?, /etc/sslh.cfg, /etc/conf.d/sslh,
/etc/default/sslh, /etc/sysconfig/sslh

sslh_exec_t

  • Set files with the sslh_exec_t type, if you want to transition an executable to the sslh_t domain.

Paths:

/usr/bin/sslh, /usr/bin/sslh-select

sslh_initrc_exec_t

  • Set files with the sslh_initrc_exec_t type, if you want to transition an executable to the sslh_initrc_t domain.

sslh_unit_file_t

  • Set files with the sslh_unit_file_t type, if you want to treat the files as sslh unit content.

sslh_var_run_t

  • Set files with the sslh_var_run_t type, if you want to store the sslh 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 is the quick fix and semanage fcontext is the commitment. Both valid, iykyk. 💅

🫶 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. For the visual learners, we salute you. 🖥️✨

⭐ AUTHOR ⭐

This manual page was auto-generated using sepolicy manpage. An algorithm wrote this and honestly? It ate. 💀🔥

🍓 SEE ALSO 🍓

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

Okay that's the whole page, bestie, you're officially an SELinux sslh expert now. This iconic lil manual is from the sslh package, dated 26-10-06, and it's the sslh_selinux(8) page. Stan. 💜🎀✨

📦 where this page comes from