Provided by: iwd_1.26-3_amd64 
NAME
iwd.config - Configuration file for wireless daemon
SYNOPSIS
Configuration file main.conf
DESCRIPTION
The main.conf configuration file configures the system-wide settings for iwd. This file
lives in the configuration directory specified by the environment variable
$CONFIGURATION_DIRECTORY, which is normally provided by systemd. In the absence of such
an environment variable it defaults to /etc/iwd. If no main.conf is present, then default
values are chosen. The presence of main.conf is not required.
FILE FORMAT
See iwd.network for details on the file format.
SETTINGS
The settings are split into several categories. Each category has a group associated with
it and described in separate tables below.
General Settings
The group [General] contains general settings.
┌─────────────────────────────────┬──────────────────────────────────┐
│EnableNetworkConfiguration │ Values: true, false │
│ │ │
│ │ Enable network configuration. │
│ │ │
│ │ Setting this option to true │
│ │ enables iwd to configure the │
│ │ network interfaces with the IP │
│ │ addresses. There are two types │
│ │ IP addressing supported by iwd: │
│ │ static and dynamic. The static │
│ │ IP addresses are configured │
│ │ through the network │
│ │ configuration files. If no │
│ │ static IP configuration has been │
│ │ provided for a network, iwd will │
│ │ attempt to obtain the dynamic │
│ │ addresses from the network │
│ │ through the built-in DHCP │
│ │ client. │
│ │ │
│ │ This also enables network │
│ │ configuration and the DHCP │
│ │ server when in AP mode and the │
│ │ AP profile being activated does │
│ │ not override it. │
│ │ │
│ │ The network configuration │
│ │ feature is disabled by default. │
│ │ See [Network] settings for │
│ │ additional settings related to │
│ │ network configuration. │
└─────────────────────────────────┴──────────────────────────────────┘
│APRanges │ Values: <IP in prefix notation> │
│ │ │
│ │ Sets the range of IP's used for │
│ │ DHCP server (AP mode). The IP │
│ │ should be in prefix notation │
│ │ e.g. 192.168.1.0/24. AP's which │
│ │ are started in a profile-less │
│ │ configuration will use this pool │
│ │ of IP's to set the AP's │
│ │ interface address as well as │
│ │ default DHCP server options. │
│ │ Each AP will get a new subnet │
│ │ from the range and clients will │
│ │ be addressed in that subnet to │
│ │ avoid IP conflicts if multiple │
│ │ AP's are started. │
├─────────────────────────────────┼──────────────────────────────────┤
│UseDefaultInterface │ Values: true, false │
│ │ │
│ │ Do not allow iwd to destroy / │
│ │ recreate wireless interfaces at │
│ │ startup, including default │
│ │ interfaces. Enable this │
│ │ behavior if your wireless card │
│ │ driver is buggy or does not │
│ │ allow such an operation, or if │
│ │ you do not want iwd to manage │
│ │ netdevs for another reason. For │
│ │ most users with an upstream │
│ │ driver it should be safe to │
│ │ omit/disable this setting. │
├─────────────────────────────────┼──────────────────────────────────┤
│AddressRandomization │ Values: disabled, once, network │
│ │ │
│ │ If AddressRandomization is set │
│ │ to disabled, the default kernel │
│ │ behavior is used. This means │
│ │ the kernel will assign a mac │
│ │ address from the permanent mac │
│ │ address range provided by the │
│ │ hardware / driver. Thus it is │
│ │ possible for networks to track │
│ │ the user by the mac address │
│ │ which is permanent. │
│ │ │
│ │ If AddressRandomization is set │
│ │ to once, MAC address is │
│ │ randomized a single time when │
│ │ iwd starts or when the hardware │
│ │ is detected for the first time │
│ │ (due to hotplug, etc.) │
│ │ │
│ │ If AddressRandomization is set │
│ │ to network, the MAC address is │
│ │ randomized on each connection to │
│ │ a network. The MAC is generated │
│ │ based on the SSID and permanent │
│ │ address of the adapter. This │
│ │ allows the same MAC to be │
│ │ generated each time connecting │
│ │ to a given SSID while still │
│ │ hiding the permanent address. │
└─────────────────────────────────┴──────────────────────────────────┘
│AddressRandomizationRange │ Values: full, nic │
│ │ │
│ │ One can control which part of │
│ │ the address is randomized using │
│ │ this setting. │
│ │ │
│ │ When using │
│ │ AddressRandomizationRange set to │
│ │ nic, only the NIC specific │
│ │ octets (last 3 octets) are │
│ │ randomized. Note that the │
│ │ randomization range is limited │
│ │ to 00:00:01 to 00:00:FE. The │
│ │ permanent mac address of the │
│ │ card is used for the initial 3 │
│ │ octets. │
│ │ │
│ │ When using │
│ │ AddressRandomizationRange set to │
│ │ full, all 6 octets of the │
│ │ address are randomized. The │
│ │ locally-administered bit will be │
│ │ set. │
├─────────────────────────────────┼──────────────────────────────────┤
│RoamThreshold │ Value: rssi dBm value, from -100 │
│ │ to 1, default: -70 │
│ │ │
│ │ This value can be used to │
│ │ control how aggressively iwd │
│ │ roams when connected to a 2.4Ghz │
│ │ access point. │
├─────────────────────────────────┼──────────────────────────────────┤
│RoamThreshold5G │ Value: rssi dBm value, from -100 │
│ │ to 1, default: -76 │
│ │ │
│ │ This value can be used to │
│ │ control how aggressively iwd │
│ │ roams when connected to a 5GHz │
│ │ access point. │
├─────────────────────────────────┼──────────────────────────────────┤
│RoamRetryInterval │ Value: unsigned int value in │
│ │ seconds (default: 60) │
│ │ │
│ │ Specifies how long iwd will wait │
│ │ before attempting to roam again │
│ │ if the last roam attempt failed, │
│ │ or if the signal of the newly │
│ │ connected BSS is still │
│ │ considered weak. │
└─────────────────────────────────┴──────────────────────────────────┘
│ManagementFrameProtection │ Values: 0, 1 or 2 │
│ │ │
│ │ When ManagementFrameProtection │
│ │ is 0, MFP is completely turned │
│ │ off, even if the hardware is │
│ │ capable. This setting is not │
│ │ recommended. │
│ │ │
│ │ When ManagementFrameProtection │
│ │ is 1, MFP is enabled if the │
│ │ local hardware and remote AP │
│ │ both support it. │
│ │ │
│ │ When ManagementFrameProtection │
│ │ is 2, MFP is always required. │
│ │ This can prevent successful │
│ │ connection establishment on some │
│ │ hardware or to some networks. │
├─────────────────────────────────┼──────────────────────────────────┤
│ControlPortOverNL80211 │ Values: false, true │
│ │ │
│ │ Enable/Disable sending EAPoL │
│ │ packets over NL80211. Enabled │
│ │ by default if kernel support is │
│ │ available. Doing so sends all │
│ │ EAPoL traffic over directly to │
│ │ the supplicant process (iwd) │
│ │ instead of putting these on the │
│ │ Ethernet device. Since only the │
│ │ supplicant can usually make │
│ │ sense / decrypt these packets, │
│ │ enabling this option can save │
│ │ some CPU cycles on your system │
│ │ and avoids certain long-standing │
│ │ race conditions. │
├─────────────────────────────────┼──────────────────────────────────┤
│DisableANQP │ Values: false, true │
│ │ │
│ │ Enable/disable ANQP queries. The │
│ │ way IWD does ANQP queries is │
│ │ dependent on a recent kernel │
│ │ patch (available in Kernel 5.3). │
│ │ If your kernel does not have │
│ │ this functionality this should │
│ │ be disabled (default). Some │
│ │ drivers also do a terrible job │
│ │ of sending public action frames │
│ │ (freezing or crashes) which is │
│ │ another reason why this has been │
│ │ turned off by default. If you │
│ │ want to easily utilize Hotspot │
│ │ 2.0 networks, then setting │
│ │ DisableANQP to false is │
│ │ recommended. │
├─────────────────────────────────┼──────────────────────────────────┤
│DisableOCV │ Value: false, true │
│ │ │
│ │ Disable Operating Channel │
│ │ Validation. Support for this is │
│ │ not advertised by the kernel so │
│ │ if kernels/drivers exist which │
│ │ don't support OCV it can be │
│ │ disabled here. │
└─────────────────────────────────┴──────────────────────────────────┘
│SystemdEncrypt │ Value: Systemd key ID │
│ │ │
│Warning: This is a highly │ Enables network profile │
│experimental feature │ encryption using a systemd │
│ │ provided secret key. Once │
│ │ enabled all PSK/8021x network │
│ │ profiles will be encrypted │
│ │ automatically. Once the profile │
│ │ is encrypted there is no way of │
│ │ going back using IWD alone. A │
│ │ tool, iwd-decrypt-profile, is │
│ │ provided assuming the secret is │
│ │ known which will decrypt a │
│ │ profile. This decrypted profile │
│ │ could manually be set to │
│ │ /var/lib/iwd to 'undo' any │
│ │ profile encryption, but its │
│ │ going to be a manual process. │
│ │ │
│ │ Setting up systemd to provide │
│ │ the secret is left up to the │
│ │ user as IWD has no way of │
│ │ performing this automatically. │
│ │ The systemd options required are │
│ │ LoadCredentialEncrypted or │
│ │ SetCredentialEncrypted, and the │
│ │ secret identifier should be │
│ │ named whatever SystemdEncrypt is │
│ │ set to. │
└─────────────────────────────────┴──────────────────────────────────┘
Network
The group [Network] contains network configuration related settings.
┌─────────────────────┬──────────────────────────────────┐
│EnableIPv6 │ Values: true, false │
│ │ │
│ │ Sets the global default that │
│ │ tells iwd whether it should │
│ │ configure IPv6 addresses and │
│ │ routes (either provided via │
│ │ static settings, Router │
│ │ Advertisements or DHCPv6 │
│ │ protocol). This setting is │
│ │ disabled by default. This │
│ │ setting can also be overridden │
│ │ on a per-network basis. │
├─────────────────────┼──────────────────────────────────┤
│NameResolvingService │ Values: resolvconf, systemd │
│ │ │
│ │ Configures a DNS resolution │
│ │ method used by the system. │
│ │ │
│ │ This configuration option must │
│ │ be used in conjunction with │
│ │ EnableNetworkConfiguration and │
│ │ provides the choice of system │
│ │ resolver integration. │
│ │ │
│ │ If not specified, systemd is │
│ │ used as default. │
└─────────────────────┴──────────────────────────────────┘
│RoutePriorityOffset │ Values: uint32 value (default: │
│ │ 300) │
│ │ │
│ │ Configures a route priority │
│ │ offset used by the system to │
│ │ prioritize the default routes. │
│ │ The route with lower priority │
│ │ offset is preferred. │
│ │ │
│ │ If not specified, 300 is used as │
│ │ default. │
├─────────────────────┼──────────────────────────────────┤
│MulticastDNS │ Values: true, false, resolve │
│ │ │
│ │ Configures multicast DNS on each │
│ │ interface. If not specified, │
│ │ systemd-resolved's default value │
│ │ will remain untouched. See man │
│ │ 5 systemd.network for details. │
│ │ │
│ │ Only applies when │
│ │ NameResolvingService=systemd. │
└─────────────────────┴──────────────────────────────────┘
Blacklist
The group [Blacklist] contains settings related to blacklisting of BSSes. If iwd
determines that a connection to a BSS fails for a reason that indicates the BSS is
currently misbehaving or misconfigured (e.g. timeouts, unexpected status/reason codes,
etc), then iwd will blacklist this BSS and avoid connecting to it for a period of time.
These options let the user control how long a misbehaved BSS spends on the blacklist.
┌───────────────┬──────────────────────────────────┐
│InitialTimeout │ Values: uint64 value in seconds │
│ │ (default: 60) │
│ │ │
│ │ The initial time that a BSS │
│ │ spends on the blacklist. │
├───────────────┼──────────────────────────────────┤
│Multiplier │ Values: unsigned int value in │
│ │ seconds (default: 30) │
│ │ │
│ │ If the BSS was blacklisted │
│ │ previously and another │
│ │ connection attempt has failed │
│ │ after the initial timeout has │
│ │ expired, then the BSS blacklist │
│ │ time will be extended by a │
│ │ multiple of Multiplier for each │
│ │ unsuccessful attempt up to │
│ │ MaxiumTimeout time in seconds. │
├───────────────┼──────────────────────────────────┤
│MaximumTimeout │ Values: uint64 value in seconds │
│ │ (default: 86400) │
│ │ │
│ │ Maximum time that a BSS is │
│ │ blacklisted. │
└───────────────┴──────────────────────────────────┘
Rank
The group [Rank] contains settings related to ranking of networks for autoconnect
purposes.
┌─────────────────┬──────────────────────────────────┐
│BandModifier5Ghz │ Values: floating point value │
│ │ (default: 1.0) │
│ │ │
│ │ Increase or decrease the │
│ │ preference for 5GHz access │
│ │ points by increasing or │
│ │ decreasing the value of this │
│ │ modifier. 5GHz networks are │
│ │ already preferred due to their │
│ │ increase throughput / data rate. │
│ │ However, 5GHz networks are │
│ │ highly RSSI sensitive, so it is │
│ │ still possible for IWD to prefer │
│ │ 2.4Ghz APs in certain │
│ │ circumstances. │
└─────────────────┴──────────────────────────────────┘
Scan
The group [Scan] contains settings related to scanning functionality. No modification
from defaults is normally required.
┌────────────────────────────┬──────────────────────────────────┐
│DisablePeriodicScan │ Values: true, false │
│ │ │
│ │ Disable periodic scan. Setting │
│ │ this option to 'true' will │
│ │ prevent iwd from issuing the │
│ │ periodic scans for the available │
│ │ networks while disconnected. │
│ │ The behavior of the │
│ │ user-initiated scans isn't │
│ │ affected. The periodic scan is │
│ │ enabled by default. │
├────────────────────────────┼──────────────────────────────────┤
│InitialPeriodicScanInterval │ Values: unsigned int value in │
│ │ seconds (default: 10) │
│ │ │
│ │ The initial periodic scan │
│ │ interval upon disconnect. │
├────────────────────────────┼──────────────────────────────────┤
│MaximumPeriodicScanInterval │ Values: unsigned int value in │
│ │ seconds (default: 300) │
│ │ │
│ │ The maximum periodic scan │
│ │ interval. │
├────────────────────────────┼──────────────────────────────────┤
│DisableRoamingScan │ Values: true, false │
│ │ │
│ │ Disable roaming scan. Setting │
│ │ this option to 'true' will │
│ │ prevent iwd from trying to scan │
│ │ when roaming decisions are │
│ │ activated. This can prevent iwd │
│ │ from roaming properly, but can │
│ │ be useful for networks operating │
│ │ under extremely low rssi levels │
│ │ where roaming isn't possible. │
└────────────────────────────┴──────────────────────────────────┘
IPv4
The group [IPv4] contains settings related to IPv4 network configuration.
┌──────────────┬──────────────────────────────────┐
│APAddressPool │ Values: comma-separated list of │
│ │ prefix-notation IP strings │
│ │ │
│ │ Defines the space of IPs used │
│ │ for the Access Point-mode subnet │
│ │ addresses and the DHCP server. │
│ │ Defaults to 192.168.0.0/16. The │
│ │ prefix length decides the size │
│ │ of the pool from which an │
│ │ address is selected but the │
│ │ actual subnet size (netmask) is │
│ │ based on the AP profile being │
│ │ activated and defaults to 28 │
│ │ bits. The AP profile's │
│ │ [IPv4].Address setting overrides │
│ │ the global value set here. │
│ │ Setting a too small address │
│ │ space will limit the number of │
│ │ access points that can be │
│ │ running simultaneously on │
│ │ different interfaces. │
└──────────────┴──────────────────────────────────┘
SEE ALSO
iwd(8), iwd.network(5)
AUTHOR
Marcel Holtmann <marcel@holtmann.org>, Denis Kenzior <denkenz@gmail.com>, Andrew
Zaborowski <andrew.zaborowski@intel.com>, Tim Kourt <tim.a.kourt@linux.intel.com>, James
Prestwood <prestwoj@gmail.com>
COPYRIGHT
2013-2019 Intel Corporation