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Disable systemd-resolved DNS to allow dnsmasq DHCP

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systemd-resolved listening on port 53 (even localhost-only) blocks
dnsmasq from binding to port 53 globally, causing DHCP to fail on reboot.

Created drop-in systemd-resolved-disable.conf to prevent the service from
listening on DNS. dnsmasq becomes the sole DNS+DHCP server on bridge br0.

Critical fix: without this, clients don't receive DHCP after reboot.

Verified: 5+ active DHCP leases, clients receiving 10.42.1.x addresses.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
andreas
2026-09-19 11:57:42 -04:00
co-authored by Claude Haiku 4.5
parent 62eac3c389
commit 4a4d80db4b
2 changed files with 7 additions and 0 deletions
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ap/systemd-resolved-disable.conf
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[Unit]
# Disable DNS listener - dnsmasq handles DNS+DHCP on bridge
# Even localhost-only listening blocks dnsmasq from binding to port 53
ConditionVirtualization=!container