+ dnsforward, config: add "parental_block_host" and "safebrowsing_block_host" settings

dnsforward/dnsforward.go

@@ -92,6 +92,10 @@ type FilteringConfig struct {
 	DisallowedClients []string `yaml:"disallowed_clients"` // IP addresses of clients that should be blocked
 	BlockedHosts      []string `yaml:"blocked_hosts"`      // hosts that should be blocked
 
+	// IP (or domain name) which is used to respond to DNS requests blocked by parental control or safe-browsing
+	ParentalBlockHost     string `yaml:"parental_block_host"`
+	SafeBrowsingBlockHost string `yaml:"safebrowsing_block_host"`
+
 	dnsfilter.Config `yaml:",inline"`
 }
 
@@ -258,6 +262,13 @@ func (s *Server) initDNSFilter() error {
 		}
 	}
 
+	if len(s.conf.ParentalBlockHost) == 0 {
+		s.conf.ParentalBlockHost = parentalBlockHost
+	}
+	if len(s.conf.SafeBrowsingBlockHost) == 0 {
+		s.conf.SafeBrowsingBlockHost = safeBrowsingBlockHost
+	}
+
 	s.dnsFilter = dnsfilter.New(&s.conf.Config, filters)
 	if s.dnsFilter == nil {
 		return fmt.Errorf("could not initialize dnsfilter")
@@ -515,9 +526,9 @@ func (s *Server) genDNSFilterMessage(d *proxy.DNSContext, result *dnsfilter.Resu
 
 	switch result.Reason {
 	case dnsfilter.FilteredSafeBrowsing:
-		return s.genBlockedHost(m, safeBrowsingBlockHost, d)
+		return s.genBlockedHost(m, s.conf.SafeBrowsingBlockHost, d)
 	case dnsfilter.FilteredParental:
-		return s.genBlockedHost(m, parentalBlockHost, d)
+		return s.genBlockedHost(m, s.conf.ParentalBlockHost, d)
 	default:
 		if result.IP != nil {
 			if m.Question[0].Qtype == dns.TypeA {