Global Flags¶

-h

Help message

-p

Attempt to make the output human readable or "pretty"

-t <seconds>

Set a timeout to be used when waiting for the NetLabel subsystem to respond

-v

Enable extra output

-V

Display the version information

Modules and Commands¶

mgmt

The management module is used to perform general queries about the NetLabel subsystem within the kernel. The different commands and their syntax are listed below.

version
Display the kernel's NetLabel management protocol version.

protocols
Display the kernel's list of supported labeling protocols.

map

The domain mapping module is used to map different NetLabel labeling protocols to either individual LSM domains or the default domain mapping. It is up to each LSM to determine what defines a domain. With SELinux, the normal SELinux domain should be used, i.e. "ping_t". In addition to protocol selection based only on the LSM domain, it is also possible to select the labeling protocol based on both the LSM domain and destination address. The network address selectors can specify either single hosts or entire networks and work for both IPv4 and IPv6, although the labeling protocol chosen must support the IP version chosen. When specifying the labeling protocol to use for each mapping there is an optional "extra" field which is used to further identify the specific labeling protocol configuration. When specifying the unlabeled protocol, "unlbl", an extra value of either "4" or "6" may be used. This restricts the mapping to IPv4 or IPv6 addresses. Omitting the extra value will result in a mapping for all address families. When specifying the CIPSO/IPv4 or the CALIPSO/IPv6 protocol, "cipso" or "calipso", the DOI value should be specified; see the EXAMPLES section for details. The different commands and their syntax are listed below.

add default|domain:<domain> [address:<ADDR>[/<MASK>]] protocol:<protocol>[,<extra>]
Add a new LSM domain / network address to NetLabel protocol mapping.

del default|domain:<domain>
Delete an existing LSM domain to NetLabel protocol mapping.

list
Display all of the configured LSM domain to NetLabel protocol mappings.

unlbl

The unlabeled (unlbl) module controls the unlabeled protocol which is used both when labeling outgoing traffic is not desired as well as when unlabeled traffic is received by the system. This module allows administrators to block all unlabeled packets from the system through the "accept" flag and assign static, or fallback, security labels to unlabeled traffic based on the inbound network interface and source address.

accept on|off
Toggle the unlabeled traffic accept flag.

add default|interface:<dev> address:<addr>[/<mask>] label:<label>
Add a new static/fallback entry.

del default|interface:<dev> address:<addr>[/<mask>]
Delete an existing static/fallback entry.

list
Display the status of the unlabeled accept flag.

cipso

The CIPSO/IPv4 (cipso) module controls the CIPSO/IPv4 labeling engine in the kernel. The CIPSO/IPv4 engine provided by NetLabel supports multiple Domains Of Interpretation (DOI) and the CIPSO/IPv4 module allows for different configurations for each DOI. At present there are three types of configurations, the "trans" configuration which allows on-the-fly translation of MLS sensitivity labels, the "pass" configuration which does not perform any translation of the MLS sensitivity label and the "local" configuration which conveys the full LSM security label over localhost/loopback connections. Regardless of which configuration type is chosen a DOI value must be specified and if the "trans" or "pass" configurations are specified then a list of the CIPSO/IPv4 tag types to use when generating the CIPSO/IPv4 packet labels must also be specified. The list of CIPSO/IPv4 tags is ordered such that when possible the first tag type listed is used when a CIPSO/IPv4 label is generated. However, if it is not possible to use the first tag type then each tag type is checked, in order, until a suitable tag type is found. If a valid tag type can not be found then the operation causing the CIPSO/IPv4 label will fail, typically this occurs whenever a new socket is created. The different commands and their syntax are listed below.

add trans doi:<DOI> tags:<T1>,<Tn> levels:<LL1>=<RL1>,<LLn>=<RLn> categories:<LC1>=<RC1>,<LCn>=<RCn>
Add a new CIPSO/IPv4 configuration using the standard/translated mapping with the given level and category translations. The levels are translated in such a way that the local level "LLn" is translated to the remote, on-the-wire level of "RLn"; the reverse translation is done for incoming packets. The same translation is done for the categories using "LCn" and "RCn". In order for a packet to be accepted, or a socket created by an application, there must be a translation for the sensitivity level and all the categories present in the MLS sensitivity label; if the entire requested sensitivity label can not be translated the application will fail.

add pass doi:<DOI> tags:<T1>,<Tn>
Add a new CIPSO/IPv4 configuration without any level or category translations.

add local doi:<DOI>
Add a new CIPSO/IPv4 configuration for localhost/loopback connections.

del doi:<DOI>
Delete an existing CIPSO/IPv4 configuration with the given DOI value. If any LSM domain mappings are present which make use of this DOI they will also be deleted.

list [doi:<DOI>]
Display a list of all the CIPSO/IPv4 configurations or just the configuration matching the optionally specified DOI.

calipso

The CALIPSO/IPv6 (calipso) module controls the CALIPSO/IPv6 labeling engine in the kernel. This behaves in a very similar way to the CIPSO/IPv4 engine, however the protocol only specifies one tag-type (equivalent to CIPSO tag-type 1) and so the tag-type should not be specified. In addition there is no support for the "local" or "trans" configuration. The different commands and their syntax are listed below.

add pass doi:<DOI>
Add a new CALIPSO/IPv6 configuration without any level or category translations.

del doi:<DOI>
Delete an existing CALIPSO/IPv6 configuration with the given DOI value. If any LSM domain mappings are present which make use of this DOI they will also be deleted.

list [doi:<DOI>]
Display a list of all the CALIPSO/IPv6 configurations or just the configuration matching the optionally specified DOI.