ntop_selinux(8)

💅 ntop_selinux — the SELinux glow-up for ntop

Okay bestie, so this page is literally the ntop_selinux manual, and it's all about the Security Enhanced Linux Policy for the ntop processes ✨ (that's the NAME section, we're not skipping it, we never skip).

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🌸 DESCRIPTION

Security-Enhanced Linux secures the ntop processes via flexible mandatory access control. That's the whole vibe — MAC, not the makeup kind 😭

The ntop processes execute with the ntop_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 ntop_t

Go ahead, run it, it's giving detective energy 🔍

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🚪 ENTRYPOINTS

The ntop_t SELinux type can be entered via the ntop_exec_t file type.

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

/usr/bin/ntop

That's the one door in, periodt.

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

The following process types are defined for ntop:

ntop_t

Note: semanage permissive -a ntop_t can be used to make the process type ntop_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 mode but the receipts still exist 🧾💀

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🎚️ BOOLEANS

SELinux policy is customizable based on least access required. ntop policy is extremely flexible and has several booleans that allow you to manipulate the policy and run ntop with the tightest access possible. Tightest access = main character security 💅

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 deny all system processes and Linux users to use bluetooth wireless technology, you must turn on the deny_bluetooth boolean. Disabled by default.

setsebool -P deny_bluetooth 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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🔌 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 ntop policy is very flexible allowing users to setup their ntop processes in as secure a method as possible.

The following port types are defined for ntop:

ntop_port_t

Default Defined Ports:

tcp 3000-3001
udp 3000-3001

Those ports are hers 🫶

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📁 MANAGED FILES

The SELinux process type ntop_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. (Yes, SELinux isn't a substitute for normal permissions, don't come for me 🙈)

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

ntop_tmp_t

(no default paths listed, she's a mystery 🎀)

ntop_var_lib_t

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

ntop_var_run_t

/run/ntop.pid

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.

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

✨ STANDARD FILE CONTEXT

SELinux defines the file context types for the ntop, 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 ntop_exec_t '/srv/ntop/content(/.*)?'
restorecon -R -v /srv/myntop_content

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

The following file types are defined for ntop:

• ntop_etc_t — Set files with the ntop_etc_t type, if you want to store ntop files in the /etc directories.
• ntop_exec_t — Set files with the ntop_exec_t type, if you want to transition an executable to the ntop_t domain.
• ntop_initrc_exec_t — Set files with the ntop_initrc_exec_t type, if you want to transition an executable to the ntop_initrc_t domain.
• ntop_tmp_t — Set files with the ntop_tmp_t type, if you want to store ntop temporary files in the /tmp directories.
• ntop_var_lib_t — Set files with the ntop_var_lib_t type, if you want to store the ntop files under the /var/lib directory.
• ntop_var_run_t — Set files with the ntop_var_run_t type, if you want to store the ntop 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. Temporary vs permanent, know the difference bestie 🔥

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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 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. A whole GUI, iconic 👑

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✍️ AUTHOR

This manual page was auto-generated using sepolicy manpage.

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👀 SEE ALSO

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

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And that's the whole page, bestie 💖 This was ntop from 26-10-06, page ntop_selinux(8) — go forth and label responsibly, mwah 🫶🌈