diff --git a/src/quic/sdlan_quic_channel.erl b/src/quic/sdlan_quic_channel.erl
index 3ca9368..f16ed4c 100644
--- a/src/quic/sdlan_quic_channel.erl
+++ b/src/quic/sdlan_quic_channel.erl
@@ -328,6 +328,12 @@ handle_event(internal, {frame, <<?PACKET_PING>>}, _StateName, State = #state{str
     quic_send(Stream, <<?PACKET_PONG>>),
     {keep_state, State#state{ping_counter = PingCounter + 1}};
 
+%% 取消注册
+handle_event(internal, {frame, <<?PACKET_UNREGISTER>>}, registered, State=#state{client_id = ClientId, mac = Mac, network_pid = NetworkPid}) when is_pid(NetworkPid) ->
+    logger:warning("[sdlan_channel] unregister client_id: ~p", [ClientId]),
+    sdlan_network:unregister(NetworkPid, ClientId, Mac),
+    {stop, normal, State};
+
 handle_event(info, {timeout, _, ping_ticker}, _, State = #state{client_id = ClientId, ping_counter = PingCounter}) ->
     %% 等待下一次的心跳检测
     erlang:start_timer(?PING_TICKER, self(), ping_ticker),
@@ -355,12 +361,6 @@ handle_event(cast, {command, Ref, ReceiverPid, SubCommand}, registered, State=#s
     quic_send(Stream, <<?PACKET_COMMAND, CommandPkt/binary>>),
     {keep_state, State#state{pkt_id = PktId + 1, pending_commands = maps:put(PktId, {Ref, ReceiverPid}, PendingCommands)}};
 
-%% 取消注册
-handle_event(info, {frame, <<?PACKET_UNREGISTER>>}, registered, State=#state{client_id = ClientId, mac = Mac, network_pid = NetworkPid}) when is_pid(NetworkPid) ->
-    logger:warning("[sdlan_channel] unregister client_id: ~p", [ClientId]),
-    sdlan_network:unregister(NetworkPid, ClientId, Mac),
-    {stop, normal, State};
-
 handle_event(info, {'EXIT', _, _}, _StateName, State) ->
     {stop, connection_closed, State};
 
diff --git a/src/sdlan_network_coordinator.erl b/src/sdlan_network_coordinator.erl
index 2d7053d..42aedcf 100644
--- a/src/sdlan_network_coordinator.erl
+++ b/src/sdlan_network_coordinator.erl
@@ -91,7 +91,7 @@ handle_cast({attach, NetworkPid, ThrottleKey}, State = #state{network_map = Netw
     {noreply, NewState :: #state{}} |
     {noreply, NewState :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term(), NewState :: #state{}}).
-handle_info({timeout, _, release_ticker}, State = #state{network_map = ChannelMap}) ->
+handle_info({timeout, _, release_ticker}, State = #state{network_map = NetworkMap}) ->
     %% 让渡资源定时器
     erlang:start_timer(100, self(), release_ticker),
     AccReleaseCount = lists:foldl(fun(ThrottleKey, Acc) ->
@@ -103,7 +103,7 @@ handle_info({timeout, _, release_ticker}, State = #state{network_map = ChannelMa
             {limit_exceeded, 0, _} ->
                 Acc
         end
-                                  end, 0, maps:keys(ChannelMap)),
+                                  end, 0, maps:values(NetworkMap)),
     % logger:debug("[sdlan_network_coordinator] can release count is: ~p", [AccReleaseCount]),
     {noreply, State#state{release_count = AccReleaseCount}};
 handle_info({'DOWN', _, process, NetworkPid, Reason}, State = #state{network_map = NetworkMap}) ->
diff --git a/src/sdlan_sup.erl b/src/sdlan_sup.erl
index c4edd9a..2134202 100644
--- a/src/sdlan_sup.erl
+++ b/src/sdlan_sup.erl
@@ -30,14 +30,14 @@ init([]) ->
 
     Specs = [
         %% 暂时注释掉dns的逻辑
-       % #{
-       %     id => dns_proxy_sup,
-       %     start => {dns_proxy_sup, start_link, []},
-       %     restart => permanent,
-       %     shutdown => 2000,
-       %     type => supervisor,
-       %     modules => ['dns_proxy_sup']
-       % },
+        #{
+            id => dns_server_sup,
+            start => {dns_server_sup, start_link, []},
+            restart => permanent,
+            shutdown => 2000,
+            type => supervisor,
+            modules => ['dns_server_sup']
+        },
         #{
             id => sdlan_network_coordinator,
             start => {sdlan_network_coordinator, start_link, []},