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[client] Explicitly disable DNSOverTLS for systemd-resolved #4579

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Merged
merged 1 commit into from
Oct 10, 2025
Merged

[client] Explicitly disable DNSOverTLS for systemd-resolved #4579

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6 changes: 6 additions & 0 deletions client/internal/dns/systemd_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ const (
systemdDbusSetDefaultRouteMethodSuffix = systemdDbusLinkInterface + ".SetDefaultRoute"
systemdDbusSetDomainsMethodSuffix = systemdDbusLinkInterface + ".SetDomains"
systemdDbusSetDNSSECMethodSuffix = systemdDbusLinkInterface + ".SetDNSSEC"
systemdDbusSetDNSOverTLSMethodSuffix = systemdDbusLinkInterface + ".SetDNSOverTLS"
systemdDbusResolvConfModeForeign = "foreign"

dbusErrorUnknownObject = "org.freedesktop.DBus.Error.UnknownObject"
Expand Down Expand Up @@ -102,6 +103,11 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig, stateMana
log.Warnf("failed to set DNSSEC to 'no': %v", err)
}

// We don't support DNSOverTLS. On some machines this is default on so we explicitly set it to off
if err := s.callLinkMethod(systemdDbusSetDNSOverTLSMethodSuffix, dnsSecDisabled); err != nil {
log.Warnf("failed to set DNSOverTLS to 'no': %v", err)
}

var (
searchDomains []string
matchDomains []string
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