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anonymize hostname: some clarifications

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https://github.com/QubesOS/qubes-issues/issues/7701
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3hhh 2022-08-20 12:37:45 +02:00
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docs/privacy/anonymizing-your-mac-address.md
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@ -51,7 +51,7 @@ You can check the MAC address currently in use by looking at the status pages of
## Anonymize 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. DHCP requests _may_ 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)). However the below alternatives exist. 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.
@ -62,7 +62,8 @@ Unfortunately `NetworkManager` currently doesn't provide an option to disable th
[main] [main]
dhcp=dhclient dhcp=dhclient
``` ```
Afterwards edit `/etc/dhcp/dhclient.conf` and remove or comment out the line starting with `send host-name`. Afterwards edit `/etc/dhcp/dhclient.conf` and remove or comment out the line starting with `send host-name`. If the file does not exist, you may be fine already.
In any case it makes sense to double check your results on e.g. your home router, `wireshark` or `tcpdump`.
If you want to decide per connection, `NetworkManager` also provides an option to not send the hostname: 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. 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.