Ubuntu Manpages

usbguard

USBGuard command-line interface

usbguard OPTIONS command [COMMAND-OPTIONS] ...

usbguard list-devices

usbguard allow-device id

usbguard block-device id

usbguard reject-device id

usbguard list-rules

usbguard append-rule rule

usbguard remove-rule id

usbguard generate-policy

usbguard watch

usbguard read-descriptor file

usbguard add-user name

usbguard remove-user name

The usbguard command provides a command-line interface (CLI) to a running usbguard-daemon(8) instance. It also provides a tool for generating initial USBGuard policies based on USB devices connected to the system.

list-devices

List all USB devices recognized by the USBGuard daemon.

Available options:

-a, --allowed

List allowed devices.

-b, --blocked

List blocked devices.

-h, --help

Show help.

allow-device [OPTIONS] id

Authorize a device identified by the device id to interact with the system.

Available options:

-p, --permanent

Make the decision permanent. A device specific allow rule will be appended to the current policy.

-h, --help

Show help.

block-device [OPTIONS] id

Deauthorize a device identified by the device id.

Available options:

-p, --permanent

Make the decision permanent. A device specific block rule will be appended to the current policy.

-h, --help

Show help.

reject-device [OPTIONS] id

Deauthorize and remove a device identified by the device id.

Available options:

-p, --permanent

Make the decision permanent. A device specific reject rule will be appended to the current policy.

-h, --help

Show help.

list-rules [OPTIONS]

List the rule set (policy) used by the USBGuard daemon.

Available options:

-d, --show-devices

Show all devices which are affected by the specific rule.

-h, --help

Show help.

append-rule [OPTIONS] rule

Append the rule to the current rule set.

Available options:

-a, --after id

Append the new rule after a rule with the specified rule id.

-h, --help

Show help.

remove-rule [OPTIONS] id

Remove a rule identified by the rule id from the rule set.

Available options:

-h, --help

Show help.

generate-policy [OPTIONS]

Generate a rule set (policy) which authorizes the currently connected USB devices.

Available options:

-p, --with-ports

Generate port specific rules for all devices. By default, port specific rules are generated only for devices which do not export an iSerial value.

-P, --no-ports-sn

Don’t generate port specific rules for devices without an iSerial value. Without this option, the tool will add a via-port attribute to any device that doesn’t provide a serial number. This is a security measure to limit devices that cannot be uniquely identified to connect only via a specific port. This makes it harder to bypass the policy since the real device will occupy the allowed USB port most of the time.

-t, --target target

Generate an explicit "catch all" rule with the specified target. The target can be one of the following values: allow, block, reject

-X, --no-hashes

Don’t generate a hash attribute for each device.

-H, --hash-only

Generate a hash-only policy.

-h, --help

Show help.

watch [OPTIONS]

Watch the IPC interface events and print them to stdout.

Available options:

-w, --wait

Wait for IPC connection to become available.

-o, --once

Wait only when starting, if needed. Exit when the connection is lost.

-e, --exec path

Run an executable file located at path for every event. Pass event data to the process via environment variables.

-h, --help

Show help.

read-descriptor [OPTIONS] file

Read a USB descriptor from a file and print it in human-readable form.

Available options:

-h, --help

Show help.

add-user name [OPTIONS]

Create an IPC access control file allowing the user/group identified by name to use the USBGuard IPC bus. The change takes effect only after restarting the usbguard-daemon(8) instance.

Available options:

-u, --user

The specified name represents a username or UID (default).

-g, --group

The specified name represents a groupname or GID.

-p, --policy privileges

Policy related privileges.

-d, --devices privileges

Device related privileges.

-e, --exceptions privileges

Exceptions related privileges.

-P, --parameters privileges

Run-time parameter related privileges.

-h, --help

Show help.

Privileges:

The privileges are expected to be in the form of a list separated by a colon:

    $ sudo usbguard add-user joe --devices=listen,modify

Consult the usbguard-daemon.conf(5) man-page for a detailed list of available privileges in each section.

remove-user name [OPTIONS]

Remove an IPC access control file associated with the user/group identified by name. The change takes effect only after restarting the usbguard-daemon(8) instance.

Available options:

-u, --user

The specified name represents a username or UID (default).

-g, --group

The specified name represents a groupname or GID.

-h, --help

Show help.

Generating an initial policy:

    $ sudo usbguard generate-policy > rules.conf
    $ vi rules.conf
    (review/modify the rule set)
    $ sudo install -m 0600 -o root -g root rules.conf /etc/usbguard/rules.conf
    $ sudo systemctl restart usbguard

usbguard-daemon(8), usbguard-daemon.conf(5), usbguard-rules.conf(5)

Unresolved directive in usbguard.1.adoc - include::footer.adoc[]