openvpn_selinux(8)

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

💅 openvpn_selinux(8) — the SELinux policy manual for openvpn, bestie edition 🎀

okay so you picked up the openvpn_selinux page (yeah, section 8, the admin section, we're fancy now) and it's literally all about how Security-Enhanced Linux keeps the openvpn processes in check. no cap, it's a good one. let's go 🦋

✨ NAME ✨

openvpn_selinux — the Security Enhanced Linux Policy for the openvpn processes. that's the whole vibe. 💖

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the openvpn processes via flexible mandatory access control. mandatory means you don't get a vote, and that's the point, bestie.

The openvpn processes execute with the openvpn_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 openvpn_t

like, that's it. that's the vibe check. 🔍

🚪 ENTRYPOINTS 🚪

The openvpn_t SELinux type can be entered via the openvpn_exec_t file type.

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

/usr/bin/openvpn

one (1) whole path. she's exclusive. 👑

👯 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 openvpn policy is very flexible allowing users to setup their openvpn processes in as secure a method as possible.

The following process types are defined for openvpn:

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

so like, permissive = "i'm not gonna stop you but i am gonna write it down in my diary." 📓💀

🎚️ BOOLEANS 🎚️

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

If you want to determine whether openvpn can change sysctl values (e.g. rp_filter), you must turn on the openvpn_allow_changing_sysctls boolean. Disabled by default.

setsebool -P openvpn_allow_changing_sysctls 1

If you want to determine whether openvpn can connect to the TCP network, you must turn on the openvpn_can_network_connect boolean. Enabled by default.

setsebool -P openvpn_can_network_connect 1

If you want to determine whether openvpn can read generic user home content files, you must turn on the openvpn_enable_homedirs boolean. Disabled by default.

setsebool -P openvpn_enable_homedirs 1

If you want to allow openvpn to run unconfined scripts, you must turn on the openvpn_run_unconfined boolean. Disabled by default.

setsebool -P openvpn_run_unconfined 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 run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 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

If you want to support ecryptfs home directories, you must turn on the use_ecryptfs_home_dirs boolean. Disabled by default.

setsebool -P use_ecryptfs_home_dirs 1

If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Enabled by default.

setsebool -P use_nfs_home_dirs 1

If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.

setsebool -P use_samba_home_dirs 1

eleven booleans, all iconic, all yours to flip. -P makes it persistent btw, so it survives a reboot. you're welcome. 🫶

🔌 PORT TYPES 🔌

SELinux defines port types to represent TCP and UDP ports.

You can see the types associated with a port by using the following command:

semanage port -l

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

The following port types are defined for openvpn:

openvpn_port_t

Default Defined Ports:

tcp 1194
udp 1194

1194 supremacy. both protocols. she contains multitudes. 🌈

🗂️ MANAGED FILES 🗂️

The SELinux process type openvpn_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.

lowkey important: SELinux is on top of normal Unix permissions, not instead of them. your UID still has to have DAC permission. no shortcuts, bestie. 🙈

NetworkManager_var_run_t

/run/teamd(/.*)?
/run/nm-xl2tpd.conf.*
/run/nm-dhclient.*
/run/NetworkManager(/.*)?
/run/wpa_supplicant(/.*)?
/run/wicd.pid
/run/NetworkManager.pid
/run/nm-dns-dnsmasq.conf
/run/wpa_supplicant-global

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

ecryptfs_t

/home/[^/]+/.Private(/.*)?
/home/[^/]+/.ecryptfs(/.*)?

faillog_t

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

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

lastlog_t

/var/log/lastlog.*
/var/lib/lastlog(/.*)?

openvpn_etc_rw_t

/etc/openvpn/ipp.txt

openvpn_status_t

/var/log/openvpn-status.log.*

openvpn_tmp_t

(no default paths listed for this one — she's mysterious like that 💅)

openvpn_var_lib_t

/var/lib/openvpn(/.*)?

openvpn_var_log_t

/var/log/openvpn.*

openvpn_var_run_t

/run/openvpn(/.*)?
/run/openvpn.client.*
/run/openvpn-server(/.*)?

root_t

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

security_t

/selinux

systemd_passwd_var_run_t

/run/systemd/ask-password(/.*)?
/run/systemd/ask-password-block(/.*)?

vpnc_var_run_t

/run/vpnc(/.*)?

wtmpdb_journal_t

/var/lib/wtmpdb/wtmp.db-journal

that's the whole list, all 21 of them, no skips, no "etc." slander. 😤

🏷️ 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 openvpn policy is very flexible allowing users to setup their openvpn processes in as secure a method as possible.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the openvpn, 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 openvpn_exec_t '/srv/openvpn/content(/.*)?'
restorecon -R -v /srv/myopenvpn_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for openvpn:

openvpn_etc_rw_t

  • Set files with the openvpn_etc_rw_t type, if you want to treat the files as openvpn etc read/write content.

openvpn_etc_t

  • Set files with the openvpn_etc_t type, if you want to store openvpn files in the /etc directories.

openvpn_exec_t

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

openvpn_initrc_exec_t

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

openvpn_status_t

  • Set files with the openvpn_status_t type, if you want to treat the files as openvpn status data.

openvpn_tmp_t

  • Set files with the openvpn_tmp_t type, if you want to store openvpn temporary files in the /tmp directories.

openvpn_unconfined_script_exec_t

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

openvpn_var_lib_t

  • Set files with the openvpn_var_lib_t type, if you want to store the openvpn files under the /var/lib directory.

openvpn_var_log_t

  • Set files with the openvpn_var_log_t type, if you want to treat the data as openvpn var log data, usually stored under the /var/log directory.

openvpn_var_run_t

  • Set files with the openvpn_var_run_t type, if you want to store the openvpn files under the /run or /var/run directory.

Paths:

/run/openvpn(/.*)?, /run/openvpn.client.*, /run/openvpn-server(/.*)?
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.

chcon = temporary glow-up. semanage fcontext = actual permanent change. don't confuse them or you'll be sad later. 😭

🛠️ 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 port can also be used to manipulate the port definitions

semanage boolean can also be used to manipulate the booleans

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

one tool to rule them all, and one GUI for when you simply cannot with the terminal today. 🖱️✨

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage.

a bot wrote this and honestly? she ate. 🤖💅

👀 SEE ALSO 👀

selinux(8), openvpn(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), openvpn_unconfined_script_selinux(8), openvpn_unconfined_script_selinux(8)

(yes, openvpn_unconfined_script_selinux(8) is listed twice. that's not a typo on my end, that's how the original rolls. she's just that relevant. 💀)

okay that's the whole page!! source is openvpn, dated 26-10-06, and it's openvpn_selinux(8) all the way down. go forth, label your files correctly, and don't forget your -Z flags. mwah!! 🍓🧚💜

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