IWD
IWD (iNet Wireless Daemon) is a wireless daemon for Linux that aims to replace WPA supplicant.
Installation
Install the iwd package and enable the dbus and iwd services.
Usage
The command-line client iwctl(1) can be
used to add, remove, and configure network connections. Commands can be passed
as arguments; when run without arguments, it provides an interactive session. To
list available commands, run iwctl help, or run iwctl and enter help at
the interactive prompt.
By default, only the root user and those in the wheel group have permission to
operate iwctl.
Configuration
Daemon configuration
The main configuration file is located in /etc/iwd/main.conf. If it does not
exist, you may create it. It is documented in
iwd.config(5).
Network configuration
Network configuration, including examples, is documented in
iwd.network(5). IWD stores
information on known networks, and reads information on pre-provisioned networks
from network configuration files located in /var/lib/iwd; IWD monitors the
directory for changes. Network configuration filenames consist of the encoding
of the SSID followed by .open, .psk, or .8021x as determined by the
security type.
As an example, a basic configuration file for a WPA2/PSK secured network would
be called <ssid>.psk, and it would contain the plain text password:
[Security]
Passphrase=<password>
Troubleshooting
By default, IWD will create and destroy the wireless interfaces (e.g. wlan0)
that it manages. This can interfere with udevd, which may attempt to rename
the interface using its rules for persistent network interface names. The
following messages may be printed to your screen as a symptom of this
interference:
[ 39.441723] udevd[1100]: Error changing net interface name wlan0 to wlp59s0: Device or resource busy
[ 39.442472] udevd[1100]: could not rename interface '3' from 'wlan0' to 'wlp59s0': Device or resource busy
A simple fix is to prevent IWD from manipulating the network interfaces in this
way by adding UseDefaultInterface=true to the [General] section of
/etc/iwd/main.conf.
An alternative approach is to disable the use of persistent network interface
names by udevd. This may be accomplished either by adding net.ifnames=0 to
your kernel cmdline or by creating a symbolic link to
/dev/null at /etc/udev/rules.d/80-net-name-slot.rules to mask the renaming
rule. This alternative approach will affect the naming of all network devices.