diff --git a/api/client/service/server.go b/api/client/service/server.go
index 1e554eb31..c6cea57b2 100644
--- a/api/client/service/server.go
+++ b/api/client/service/server.go
@@ -43,7 +43,7 @@ func (s *Server) GetFreeToken(ctx context.Context, request *proto.GetFreeTokenRe
 func (s *Server) Start(ip, port string) (*grpc.Server, error) {
 	// TODO(minhdoan): Currently not using ip. Fix it later.
 	addr := net.JoinHostPort("", port)
-	lis, err := net.Listen("tcp", addr)
+	lis, err := net.Listen("tcp4", addr)
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
 	}
diff --git a/api/proto/message/server.go b/api/proto/message/server.go
index 20b90d5db..da0f51174 100644
--- a/api/proto/message/server.go
+++ b/api/proto/message/server.go
@@ -81,7 +81,7 @@ func (s *Server) Process(ctx context.Context, message *Message) (*Response, erro
 // Start starts the Server on given ip and port.
 func (s *Server) Start() (*grpc.Server, error) {
 	addr := net.JoinHostPort(IP, Port)
-	lis, err := net.Listen("tcp", addr)
+	lis, err := net.Listen("tcp4", addr)
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
 	}
diff --git a/api/service/syncing/downloader/server.go b/api/service/syncing/downloader/server.go
index d1953aa8f..ea82c19b9 100644
--- a/api/service/syncing/downloader/server.go
+++ b/api/service/syncing/downloader/server.go
@@ -43,7 +43,7 @@ func (s *Server) Query(ctx context.Context, request *pb.DownloaderRequest) (*pb.
 // Start starts the Server on given ip and port.
 func (s *Server) Start(ip, port string) (*grpc.Server, error) {
 	addr := net.JoinHostPort("", port)
-	lis, err := net.Listen("tcp", addr)
+	lis, err := net.Listen("tcp4", addr)
 	if err != nil {
 		log.Fatalf("[SYNC] failed to listen: %v", err)
 	}
diff --git a/node/service_setup.go b/node/service_setup.go
index 8d4212d93..1818481df 100644
--- a/node/service_setup.go
+++ b/node/service_setup.go
@@ -27,8 +27,11 @@ func (node *Node) setupForValidator() {
 	node.serviceManager.RegisterService(service.Consensus, consensus.New(node.BlockChannel, node.Consensus, node.startConsensus))
 	// Register new block service.
 	node.serviceManager.RegisterService(service.BlockProposal, blockproposal.New(node.Consensus.ReadySignal, node.WaitForConsensusReadyV2))
-	// Register client support service.
-	node.serviceManager.RegisterService(service.ClientSupport, clientsupport.New(node.Blockchain().State, node.CallFaucetContract, node.SelfPeer.IP, node.SelfPeer.Port))
+
+	if node.NodeConfig.GetNetworkType() != nodeconfig.Mainnet {
+		// Register client support service.
+		node.serviceManager.RegisterService(service.ClientSupport, clientsupport.New(node.Blockchain().State, node.CallFaucetContract, node.SelfPeer.IP, node.SelfPeer.Port))
+	}
 	// Register new metrics service
 	if node.NodeConfig.GetMetricsFlag() {
 		node.serviceManager.RegisterService(service.Metrics, metrics.New(&node.SelfPeer, node.NodeConfig.ConsensusPubKey.SerializeToHexStr(), node.NodeConfig.GetPushgatewayIP(), node.NodeConfig.GetPushgatewayPort()))
diff --git a/scripts/node.sh b/scripts/node.sh
index b162d24ed..cb6b4e668 100755
--- a/scripts/node.sh
+++ b/scripts/node.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-version="v1 20190924.0"
+version="v1 20191105.1"
 
 unset -v progname
 progname="${0##*/}"