diff --git a/docs/privacy/anonymizing-your-mac-address.md b/docs/privacy/anonymizing-your-mac-address.md index cc8c2c1..7b9a53c 100644 --- a/docs/privacy/anonymizing-your-mac-address.md +++ b/docs/privacy/anonymizing-your-mac-address.md @@ -64,13 +64,27 @@ Finally, shutdown all VMs and change the settings of sys-firewall, etc. to use t You can check the MAC address currently in use by looking at the status pages of your router device(s), or inside the NetVM with the command `sudo ip link show`. -## Randomize your hostname +## Anonymize your hostname DHCP requests also leak your hostname to your LAN. Since your hostname is usually `sys-net`, other network users can easily spot that you're using Qubes OS. -Unfortunately `NetworkManager` currently doesn't provide an option to disable that leak globally ([Gnome Bug 768076](https://bugzilla.gnome.org/show_bug.cgi?id=768076)). +Unfortunately `NetworkManager` currently doesn't provide an option to disable that leak globally ([Gnome Bug 768076](https://bugzilla.gnome.org/show_bug.cgi?id=768076)). However the below alternatives exist. -You may however use the following code to assign a random hostname to a VM during each of its startup. Please follow the instructions mentioned in the beginning to properly install it. +### Prevent hostname sending + +`NetworkManager` can be configured to use `dhclient` for DHCP requests. `dhclient` has options to prevent the hostname from being sent. To do that, add a file to your `sys-net` template (usually the Fedora or Debian base template) named e.g. `/etc/NetworkManager/conf.d/dhclient.conf` with the following content: +``` +[main] +dhcp=dhclient +``` +Afterwards edit `/etc/dhcp/dhclient.conf` and remove or comment out the line starting with `send host-name`. + +If you want to decide per connection, `NetworkManager` also provides an option to not send the hostname: +Edit the saved connection files at `/rw/config/NM-system-connections/*.nmconnection` and add the `dhcp-send-hostname=false` line to both the `[ipv4]` and the `[ipv6]` section. + +### Randomize the hostname + +Alternatively you may use the following code to assign a random hostname to a VM during each of its startup. Please follow the instructions mentioned in the beginning to properly install it. ```.bash #!/bin/bash