feat(securedns): add NetworkManager dispatcher#1370
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RoyalOughtness merged 5 commits intosecureblue:stagingfrom Sep 22, 2025
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feat(securedns): add NetworkManager dispatcher#1370RoyalOughtness merged 5 commits intosecureblue:stagingfrom
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Fixes an issue where Proton VPN does not set an explicit dns-search domain. Creates a NetworkManager dispatcher that applies key=value pairs in the [vpn] section of /etc/NetworkManager/sb-connection-defaults.conf to any new vpn/wireguard connections. It's quite generic as to allow per-connection hardening options (e.g. MAC randomisation) and per-connection DNS easily in future.
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files/system/etc/NetworkManager/dispatcher.d/pre-up.d/secureblue_vpn.py
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* feat(securedns): dispatcher, initially for VPNs (close #1368) Fixes an issue where Proton VPN does not set an explicit dns-search domain. Creates a NetworkManager dispatcher that applies key=value pairs in the [vpn] section of /etc/NetworkManager/sb-connection-defaults.conf to any new vpn/wireguard connections. It's quite generic as to allow per-connection hardening options (e.g. MAC randomisation) and per-connection DNS easily in future.
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Effects:
ipv4.dns-searchfrom~to.for all new VPN connections.Changelog:
/etc/NetworkManager/sb-connection-defaults.conf, a config file with a[vpn]section.key = valuepairs in this section are applied to all new VPN connections.It's written quite generically to allow for this possible roadmap:
[wan]section to the config file to apply e.g. custom DNS servers to each connection, which can then be opted out of manually on a case-by-case basis.Future work:
NetworkManager-dispatcher.serviceto give the dispatcher least privileges, in line with improve systemd sandboxing and autostart services #114.