diff --git a/ClientTester/EchoClientTester/DummyService/DummyClientService.cs b/ClientTester/EchoClientTester/DummyService/DummyClientService.cs
index 400938f..1251862 100644
--- a/ClientTester/EchoClientTester/DummyService/DummyClientService.cs
+++ b/ClientTester/EchoClientTester/DummyService/DummyClientService.cs
@@ -11,10 +11,18 @@ public class DummyClientService
     // 모든거 강종
     public event Action? OnAllDisconnected;
 
-    public DummyClientService(int count, string ip, int port, string key, int sendIntervalMs = 1000)
+    public DummyClientService(int count, string ip, int port, string key, int sendIntervalMs = 1000, MapBounds? mapBounds = null)
     {
         sendInterval = sendIntervalMs;
-        clients = Enumerable.Range(1, count + 1).Select(i => new DummyClients(i, ip, port, key)).ToList();
+        clients = Enumerable.Range(1, count).Select(i =>
+        {
+            DummyClients client = new DummyClients(i, ip, port, key);
+            if (mapBounds != null)
+            {
+                client.Map = mapBounds;
+            }
+            return client;
+        }).ToList();
 
         Log.Information("[SERVICE] {Count}개 클라이언트 생성 → {Ip}:{Port}", count, ip, port);
     }
@@ -30,30 +38,23 @@ public class DummyClientService
         {
             foreach (DummyClients c in clients)
             {
-                c.PollEvents();
+                try
+                {
+                    c.PollEvents();
+                }
+                catch (Exception ex)
+                {
+                    Log.Error("[Client {ClientId}] PollEvents 예외: {Ex}", c.clientId, ex.Message);
+                }
             }
 
-            try
-            {
-                await Task.Delay(10, ct);
-            }
-            catch (OperationCanceledException)
-            {
-                break;
-            }
+            await Task.Delay(10);
         }
     }
 
     private async Task SendLoopAsync(CancellationToken ct)
     {
-        try
-        {
-            await Task.Delay(500, ct);
-        }
-        catch (OperationCanceledException)
-        {
-            return;
-        }
+        await Task.Delay(500);
 
         int tick = 0;
 
@@ -85,14 +86,7 @@ public class DummyClientService
             Log.Debug("[TICK {Tick:000}] {Sent}/{Total} 전송", tick, sent, total);
             tick++;
 
-            try
-            {
-                await Task.Delay(sendInterval, ct);
-            }
-            catch (OperationCanceledException)
-            {
-                break;
-            }
+            await Task.Delay(sendInterval);
         }
     }
 
diff --git a/ClientTester/EchoClientTester/DummyService/DummyClients.cs b/ClientTester/EchoClientTester/DummyService/DummyClients.cs
index ff01e3e..b00572c 100644
--- a/ClientTester/EchoClientTester/DummyService/DummyClients.cs
+++ b/ClientTester/EchoClientTester/DummyService/DummyClients.cs
@@ -28,6 +28,9 @@ public class DummyClients
     private float dirX = 0f;
     private float dirZ = 0f;
 
+    // 맵 경계
+    public MapBounds Map { get; set; } = new MapBounds(-50f, 50f, -50f, 50f);
+
     // 통계
     public int SentCount
     {
@@ -71,15 +74,6 @@ public class DummyClients
 
         listener.NetworkReceiveEvent += (peer, reader, channel, deliveryMethod) =>
         {
-            short code = reader.GetShort();
-            short bodyLength = reader.GetShort();
-            string? msg = reader.GetString();
-
-            if (msg != null)
-            {
-                RttCount++;
-            }
-
             ReceivedCount++;
             reader.Recycle();
         };
@@ -104,8 +98,12 @@ public class DummyClients
         // 남은 거리가 없으면 새 방향·목표 거리 설정
         if (distance <= 0f)
         {
-            // 현재 각도에서 -30~+30도 범위로 회전
-            rotY = (rotY + Random.Shared.Next(-30, 31) + 360) % 360;
+            // 벽에 붙어있으면 반대 방향 강제, 아니면 ±30도 회전
+            int wallRotY = Map.GetRotYAwayFromWall(posX, posZ);
+            rotY = wallRotY >= 0
+                ? (wallRotY + Random.Shared.Next(-30, 31) + 360) % 360
+                : (rotY     + Random.Shared.Next(-30, 31) + 360) % 360;
+
             float rad = rotY * MathF.PI / 180f;
             dirX = MathF.Sin(rad);
             dirZ = MathF.Cos(rad);
@@ -117,9 +115,14 @@ public class DummyClients
 
         // 이번 틱 이동량 (남은 거리 초과 방지)
         float step = MathF.Min(moveSpeed * delta, distance);
-        posX += dirX * step;
-        posZ += dirZ * step;
-        distance -= step;
+        float nextX = posX + dirX * step;
+        float nextZ = posZ + dirZ * step;
+
+        // 벽 충돌 시 clamp + 다음 틱에 방향 재설정
+        bool hitWall = Map.Clamp(ref nextX, ref nextZ);
+        posX = nextX;
+        posZ = nextZ;
+        distance = hitWall ? 0f : distance - step;
 
         // 정수 Vector3 갱신
         position.X = (int)MathF.Round(posX);
diff --git a/ClientTester/EchoClientTester/DummyService/MapBounds.cs b/ClientTester/EchoClientTester/DummyService/MapBounds.cs
new file mode 100644
index 0000000..e59ec13
--- /dev/null
+++ b/ClientTester/EchoClientTester/DummyService/MapBounds.cs
@@ -0,0 +1,116 @@
+namespace ClientTester.DummyService;
+
+public class MapBounds
+{
+    public float MinX
+    {
+        get;
+        set;
+    }
+
+    public float MaxX
+    {
+        get;
+        set;
+    }
+
+    public float MinZ
+    {
+        get;
+        set;
+    }
+
+    public float MaxZ
+    {
+        get;
+        set;
+    }
+
+    public MapBounds(float minX, float maxX, float minZ, float maxZ)
+    {
+        MinX = minX;
+        MaxX = maxX;
+        MinZ = minZ;
+        MaxZ = maxZ;
+    }
+
+    // 위치가 경계 안에 있는지 체크
+    public bool IsInside(float x, float z)
+    {
+        return x >= MinX && x <= MaxX && z >= MinZ && z <= MaxZ;
+    }
+
+    // 경계 초과 시 clamp, 벽에 부딪혔으면 true 반환
+    public bool Clamp(ref float x, ref float z)
+    {
+        bool hit = false;
+
+        if (x < MinX)
+        {
+            x = MinX;
+            hit = true;
+        }
+        else if (x > MaxX)
+        {
+            x = MaxX;
+            hit = true;
+        }
+
+        if (z < MinZ)
+        {
+            z = MinZ;
+            hit = true;
+        }
+        else if (z > MaxZ)
+        {
+            z = MaxZ;
+            hit = true;
+        }
+
+        return hit;
+    }
+
+    // 현재 위치 기준으로 벽 반대 방향 rotY 계산 (벽 없으면 -1)
+    public int GetRotYAwayFromWall(float x, float z, float margin = 0.5f)
+    {
+        bool atLeft = x <= MinX + margin;
+        bool atRight = x >= MaxX - margin;
+        bool atBottom = z <= MinZ + margin;
+        bool atTop = z >= MaxZ - margin;
+
+        if (!atLeft && !atRight && !atBottom && !atTop)
+        {
+            return -1; // 벽 근처 아님
+        }
+
+        // 벽 반대 방향 벡터 합산
+        float awayX = 0f, awayZ = 0f;
+        if (atLeft)
+        {
+            awayX += 1f;
+        }
+
+        if (atRight)
+        {
+            awayX -= 1f;
+        }
+
+        if (atBottom)
+        {
+            awayZ += 1f;
+        }
+
+        if (atTop)
+        {
+            awayZ -= 1f;
+        }
+
+        // 정규화
+        float len = MathF.Sqrt(awayX * awayX + awayZ * awayZ);
+        awayX /= len;
+        awayZ /= len;
+
+        // 방향 벡터 → rotY (degree)
+        return ((int)(MathF.Atan2(awayX, awayZ) * 180f / MathF.PI) + 360) % 360;
+    }
+}
diff --git a/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClientService.cs b/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClientService.cs
index ad0fc48..bcc285e 100644
--- a/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClientService.cs
+++ b/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClientService.cs
@@ -59,27 +59,13 @@ public class EchoDummyClientService
                 c.PollEvents();
             }
 
-            try
-            {
-                await Task.Delay(10, ct);
-            }
-            catch (OperationCanceledException)
-            {
-                break;
-            }
+            await Task.Delay(10);
         }
     }
 
     private async Task SendLoopAsync(CancellationToken ct)
     {
-        try
-        {
-            await Task.Delay(500, ct);
-        }
-        catch (OperationCanceledException)
-        {
-            return;
-        }
+        await Task.Delay(500);
 
         int tick = 0;
 
@@ -111,14 +97,7 @@ public class EchoDummyClientService
             Log.Debug("[TICK {Tick:000}] {Sent}/{Total} 전송", tick, sent, total);
             tick++;
 
-            try
-            {
-                await Task.Delay(sendInterval, ct);
-            }
-            catch (OperationCanceledException)
-            {
-                break;
-            }
+            await Task.Delay(sendInterval);
         }
     }
 
diff --git a/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClients.cs b/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClients.cs
index e809ef8..24f2b36 100644
--- a/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClients.cs
+++ b/ClientTester/EchoClientTester/EchoDummyService/EchoDummyClients.cs
@@ -1,5 +1,6 @@
 using System.Collections.Concurrent;
 using System.Diagnostics;
+using System.Text;
 using ClientTester.Packet;
 using LiteNetLib;
 using LiteNetLib.Utils;
@@ -131,12 +132,12 @@ public class EchoDummyClients
             }
         }
 
-        PacketHeader packetHeader = new PacketHeader();
-        packetHeader.Code = 0;
-        packetHeader.BodyLength = (ushort)$"Echo seq:{seq}".Length;
-        writer.Put((short)packetHeader.Code);
-        writer.Put((short)packetHeader.BodyLength);
-        writer.Put($"Echo seq:{seq}");
+        // string → raw bytes (길이 prefix 방지)
+        EchoPacket echoPacket = new EchoPacket();
+        echoPacket.Str = $"Echo seq:{seq}";
+
+        byte[] data = PacketSerializer.Serialize<EchoPacket>((ushort)PacketCode.ECHO, echoPacket);
+        writer.Put(data);
         // 순서보장 안함 HOL Blocking 제거
         peer.Send(writer, DeliveryMethod.ReliableUnordered);
         SentCount++;
diff --git a/ClientTester/EchoClientTester/Packet/PacketBody.cs b/ClientTester/EchoClientTester/Packet/PacketBody.cs
index aed4292..81d4214 100644
--- a/ClientTester/EchoClientTester/Packet/PacketBody.cs
+++ b/ClientTester/EchoClientTester/Packet/PacketBody.cs
@@ -4,6 +4,22 @@ using ProtoBuf;
 
 namespace ClientTester.Packet;
 
+// ============================================================
+// 에코용
+// ============================================================
+
+// ECHO
+[ProtoContract]
+public class EchoPacket
+{
+    [ProtoMember(1)]
+    public string Str
+    {
+        get;
+        set;
+    }
+}
+
 // ============================================================
 // 공통 타입
 // ============================================================
diff --git a/ClientTester/EchoClientTester/Packet/PacketHeader.cs b/ClientTester/EchoClientTester/Packet/PacketHeader.cs
index ee28321..faa6e06 100644
--- a/ClientTester/EchoClientTester/Packet/PacketHeader.cs
+++ b/ClientTester/EchoClientTester/Packet/PacketHeader.cs
@@ -2,6 +2,8 @@ namespace ClientTester.Packet;
 
 public enum PacketCode : ushort
 {
+    ECHO = 0,
+
     // 초기 클라이언트 시작시 jwt토큰 받아옴
     ACC_TOKEN = 1,
 
diff --git a/ClientTester/EchoClientTester/Packet/PacketSerializer.cs b/ClientTester/EchoClientTester/Packet/PacketSerializer.cs
index a9ed08c..d9c4067 100644
--- a/ClientTester/EchoClientTester/Packet/PacketSerializer.cs
+++ b/ClientTester/EchoClientTester/Packet/PacketSerializer.cs
@@ -11,7 +11,7 @@ namespace ClientTester.Packet
         public static byte[] Serialize<T>(ushort type, T packet)
         {
             using MemoryStream payloadMs = new MemoryStream();
-            Serializer.Serialize(payloadMs, packet);
+            Serializer.Serialize<T>(payloadMs, packet);
             byte[] payload = payloadMs.ToArray();
             ushort size = (ushort)payload.Length;
 
diff --git a/ClientTester/EchoClientTester/Program.cs b/ClientTester/EchoClientTester/Program.cs
index 857d3ee..167e9ed 100644
--- a/ClientTester/EchoClientTester/Program.cs
+++ b/ClientTester/EchoClientTester/Program.cs
@@ -7,7 +7,7 @@ class EcoClientTester
     public static readonly string SERVER_IP = "localhost";
     public static readonly int SERVER_PORT = 9500;
     public static readonly string CONNECTION_KEY = "test";
-    public static readonly int CLIENT_COUNT = 100;
+    public static readonly int CLIENT_COUNT = 10;
 
     private async Task StartEchoDummyTest()
     {
diff --git a/MMOTestServer/MMOserver/Game/Channel/ChannelManager.cs b/MMOTestServer/MMOserver/Game/Channel/ChannelManager.cs
index 2545d03..5862f3a 100644
--- a/MMOTestServer/MMOserver/Game/Channel/ChannelManager.cs
+++ b/MMOTestServer/MMOserver/Game/Channel/ChannelManager.cs
@@ -21,7 +21,7 @@ public class ChannelManager
 
     public void Initializer(int channelSize = 1)
     {
-        for (int i = 0; i < channelSize; i++)
+        for (int i = 0; i <= channelSize; i++)
         {
             channels.Add(new Channel(i));
         }
@@ -40,7 +40,7 @@ public class ChannelManager
     public void AddUser(int channelId, long userId, Player player)
     {
         // 유저 추가
-        connectUsers[userId] = channelId;
+        connectUsers.Add(userId, channelId);
         // 채널에 유저 추가
         channels[channelId].AddUser(userId, player);
     }
diff --git a/MMOTestServer/MMOserver/Game/GameServer.cs b/MMOTestServer/MMOserver/Game/GameServer.cs
index fa2bc83..26aedfe 100644
--- a/MMOTestServer/MMOserver/Game/GameServer.cs
+++ b/MMOTestServer/MMOserver/Game/GameServer.cs
@@ -1,4 +1,5 @@
 using LiteNetLib;
+using LiteNetLib.Utils;
 using MMOserver.Game.Channel;
 using MMOserver.Packet;
 using ProtoBuf;
@@ -24,6 +25,54 @@ public class GameServer : ServerBase
         };
     }
 
+    protected override void HandleEcho(NetPeer peer, byte[] payload)
+    {
+        if (payload.Length < 4)
+        {
+            Log.Warning("[Server] Echo 페이로드 크기 오류 PeerId={Id} Length={Len}", peer.Id, payload.Length);
+            return;
+        }
+
+        // 세션에 넣지는 않는다.
+        NetDataReader reader = new NetDataReader(payload);
+        short code = reader.GetShort();
+        short bodyLength = reader.GetShort();
+
+        EchoPacket echoPacket = Serializer.Deserialize<EchoPacket>(payload.AsMemory(4));
+        Log.Debug("[Echo] : addr={Addr}, str={Str}", peer.Address, echoPacket.Str);
+        // Echo메시지는 순서보장 안함 HOL Blocking 제거
+        SendTo(peer, payload, DeliveryMethod.ReliableUnordered);
+    }
+
+    protected override void HandleAuth(NetPeer peer, byte[] payload)
+    {
+        AccTokenPacket accTokenPacket = Serializer.Deserialize<AccTokenPacket>(new ReadOnlyMemory<byte>(payload));
+        long hashKey = accTokenPacket.Token;
+
+        if (sessions.TryGetValue(hashKey, out NetPeer? existing))
+        {
+            // WiFi → LTE 전환 등 재연결: 이전 피어 교체
+            existing.Tag = null;
+            sessions.Remove(hashKey);
+            Log.Information("[Server] 재연결 HashKey={Key} Old={Old} New={New}", hashKey, existing.Id, peer.Id);
+            existing.Disconnect();
+        }
+
+        peer.Tag = new Session(hashKey, peer);
+        sessions[hashKey] = peer;
+        pendingPeers.Remove(peer.Id);
+
+        if (hashKey <= 1000)
+        {
+            // 더미 클라다.
+            ChannelManager cm = ChannelManager.Instance;
+            cm.AddUser(1, hashKey, new Player());
+        }
+
+        Log.Information("[Server] 인증 완료 HashKey={Key} PeerId={Id}", hashKey, peer.Id);
+        OnSessionConnected(peer, hashKey);
+    }
+
     protected override void OnSessionConnected(NetPeer peer, long hashKey)
     {
         Log.Information("[GameServer] 세션 연결 HashKey={Key} PeerId={Id}", hashKey, peer.Id);
diff --git a/MMOTestServer/MMOserver/MMOserver.csproj b/MMOTestServer/MMOserver/MMOserver.csproj
index 3f9edfb..d8324ce 100644
--- a/MMOTestServer/MMOserver/MMOserver.csproj
+++ b/MMOTestServer/MMOserver/MMOserver.csproj
@@ -30,4 +30,8 @@
         <ProjectReference Include="..\ServerLib\ServerLib.csproj" />
     </ItemGroup>
 
+    <ItemGroup>
+      <Folder Include="RestApi\" />
+    </ItemGroup>
+
 </Project>
diff --git a/MMOTestServer/MMOserver/Packet/PacketBody.cs b/MMOTestServer/MMOserver/Packet/PacketBody.cs
index eb8cec3..171cda1 100644
--- a/MMOTestServer/MMOserver/Packet/PacketBody.cs
+++ b/MMOTestServer/MMOserver/Packet/PacketBody.cs
@@ -4,6 +4,22 @@ using ProtoBuf;
 
 namespace MMOserver.Packet;
 
+// ============================================================
+// 에코용
+// ============================================================
+
+// ECHO
+[ProtoContract]
+public class EchoPacket
+{
+    [ProtoMember(1)]
+    public string Str
+    {
+        get;
+        set;
+    }
+}
+
 // ============================================================
 // 공통 타입
 // ============================================================
diff --git a/MMOTestServer/MMOserver/Packet/PacketHeader.cs b/MMOTestServer/MMOserver/Packet/PacketHeader.cs
index 6a959cb..c8630ee 100644
--- a/MMOTestServer/MMOserver/Packet/PacketHeader.cs
+++ b/MMOTestServer/MMOserver/Packet/PacketHeader.cs
@@ -2,8 +2,10 @@ namespace MMOserver.Packet;
 
 public enum PacketCode : ushort
 {
+    ECHO = 0,
+
     // 초기 클라이언트 시작시 jwt토큰 받아옴
-    ACC_TOKEN,
+    ACC_TOKEN = 1,
 
     // 내 정보 로드 (서버 -> 클라)
     LOAD_GAME,
diff --git a/MMOTestServer/ServerLib/Packet/PacketSerializer.cs b/MMOTestServer/ServerLib/Packet/PacketSerializer.cs
index d3d308d..d2745d3 100644
--- a/MMOTestServer/ServerLib/Packet/PacketSerializer.cs
+++ b/MMOTestServer/ServerLib/Packet/PacketSerializer.cs
@@ -43,7 +43,7 @@ namespace ServerLib.Packet
 
             // 헤더에 명시된 size와 실제 데이터 길이 검증
             int actualPayloadLen = data.Length - 4;
-            if (size > actualPayloadLen)
+            if (size != actualPayloadLen)
             {
                 Log.Warning("[PacketSerializer] 페이로드 크기 불일치 HeaderSize={Size} ActualSize={Actual}", size, actualPayloadLen);
                 return (0, 0, null)!;
diff --git a/MMOTestServer/ServerLib/Service/ServerBase.cs b/MMOTestServer/ServerLib/Service/ServerBase.cs
index 6c8b4de..e39fcee 100644
--- a/MMOTestServer/ServerLib/Service/ServerBase.cs
+++ b/MMOTestServer/ServerLib/Service/ServerBase.cs
@@ -30,7 +30,7 @@ public abstract class ServerBase : INetEventListener
     protected NetManager netManager = null!;
 
     // 인증 전 대기 피어  (peer.Id → NetPeer)
-    private readonly Dictionary<int, NetPeer> pendingPeers = new();
+    protected readonly Dictionary<int, NetPeer> pendingPeers = new();
 
     // 인증된 세션      (hashKey → NetPeer)  재연결 조회용
     // peer → hashKey 역방향은 peer.Tag as Session 으로 대체
@@ -202,52 +202,11 @@ public abstract class ServerBase : INetEventListener
 
     // Echo 서버 테스트
 
-    private void HandleEcho(NetPeer peer, byte[] payload)
-    {
-        if (payload.Length < 4)
-        {
-            Log.Warning("[Server] Echo 페이로드 크기 오류 PeerId={Id} Length={Len}", peer.Id, payload.Length);
-            return;
-        }
-
-        // 세션에 넣지는 않는다.
-        NetDataReader reader = new NetDataReader(payload);
-        short code = reader.GetShort();
-        short bodyLength = reader.GetShort();
-        Log.Debug("[Echo] : addr={Addr}, str={Str}", peer.Address, reader.GetString());
-        // Echo메시지는 순서보장 안함 HOL Blocking 제거
-        SendTo(peer, payload, DeliveryMethod.ReliableUnordered);
-    }
+    protected abstract void HandleEcho(NetPeer peer, byte[] payload);
 
     // ─── Auth 처리 (내부) ────────────────────────────────────────────────
 
-    private void HandleAuth(NetPeer peer, byte[] payload)
-    {
-        if (payload.Length < sizeof(long))
-        {
-            Log.Warning("[Server] Auth 페이로드 크기 오류 PeerId={Id} Length={Len}", peer.Id, payload.Length);
-            peer.Disconnect();
-            return;
-        }
-
-        long hashKey = BitConverter.ToInt64(payload, 0);
-
-        if (sessions.TryGetValue(hashKey, out NetPeer? existing))
-        {
-            // WiFi → LTE 전환 등 재연결: 이전 피어 교체
-            existing.Tag = null;
-            sessions.Remove(hashKey);
-            Log.Information("[Server] 재연결 HashKey={Key} Old={Old} New={New}", hashKey, existing.Id, peer.Id);
-            existing.Disconnect();
-        }
-
-        peer.Tag = new Session(hashKey, peer);
-        sessions[hashKey] = peer;
-        pendingPeers.Remove(peer.Id);
-
-        Log.Information("[Server] 인증 완료 HashKey={Key} PeerId={Id}", hashKey, peer.Id);
-        OnSessionConnected(peer, hashKey);
-    }
+    protected abstract void HandleAuth(NetPeer peer, byte[] payload);
 
     // ─── 전송 헬퍼 ───────────────────────────────────────────────────────