Arch Linux

xanderlord

Member

Registered: 2022-04-09

Posts: 1

Cannot get MAC address randomization to work

I am using systemd-networkd. Here's the contents of my 00-default.link file, taken from https://wiki.archlinux.org/title/MAC_address_spoofing:

    [Match]
    MACAddress=10:3d:xx:xx:xx:xx <- changed
   
    [Link]
    MACAddressPolicy=random
    NamePolicy=kernel database onboard slot path

Verification that systemd-networkd is running:

# systemctl status systemd-networkd
systemd-networkd.service - Network Configuration
     Loaded: loaded (/usr/lib/systemd/system/systemd-networkd.service; enabled; vendor prese>
     Active: active (running) since Sat 2022-04-09 15:17:30 MDT; 6min ago

I use iwd to manage the wireless adapter, and enabled randomization per https://iwd.wiki.kernel.org/addressrandomization:

    $ cat /etc/iwd/main.conf
    [General]
    UseDefaultInterface=true
    AddressRandomization=network
    AlwaysRandomizeAddress=true
    [Service]
    ExecStartPre=/usr/bin/sleep 2
    [Network]
    NameResolvingService=systemd

When I enabled this, it changed the MAC address once, but subsequent boots/reboots have not had any change. I've tried one or the other (systemd and iwd) randomization, and both together, with no actual every-boot randomization.

I've done my best to read the manual and must be missing something. Thanks in advance!

Last edited by xanderlord (2022-04-09 21:31:41)

Arisa

Member

From: Valhalla

Registered: 2019-11-12

Posts: 9

Re: Cannot get MAC address randomization to work

You used "AlwaysRandomizeAddress=true" in wrong config file, it's suppose to be used in [Settings] section in iwd network file (/var/lib/iwd/) for each network and in the main config you should have in section [General] "AddressRandomization=once" and every link file should have in [Link] section "MACAddressPolicy=random"

Last edited by Arisa (2022-04-20 20:13:54)