diff --git a/README.md b/README.md
index fd1e404..7d6af44 100644
--- a/README.md
+++ b/README.md
@@ -184,9 +184,35 @@ nodeagent/
 | **v3+** | **审计日志**（谁在何时调了什么 + 查询能力）+ **限速** | ✅ 已实现 |
 | **v4** | 无感体验：**局域网自动发现** + **断线自动重连** | ✅ 已实现 |
 | **v5** | **多设备管理** + **文件传输**（分块 / 大文件 / 原子写） | ✅ 已实现 |
+| **v6** | **Hub 中转**：跨网段 / 公网接入（被控端主动外连，穿 NAT） | ✅ 已实现 |
 
 > **输入控制安全默认**：`input.*` 为高危能力，**默认禁用**。需在被控端 `agent.json` 设 `"allow_input": true` 重启后生效，或用 `install.ps1 -AllowInput` 安装。
 
+## Hub 中转（v6，跨网段 / 公网）
+
+被控端与 Mac 不在同一局域网时，用 Hub 中转：
+
+```
+Mac ──► Hub（VPS / 公网）──► Windows（NAT 后也可）
+           ↑ 只透传，不解密
+```
+
+```bash
+# 1) 在 VPS 上启动 Hub
+node apps/hub/dist/index.js
+#    输出 Hub 令牌（首次启动自动生成，存于 ~/.nodeagent/hub.json）
+
+# 2) 被控端 agent.json 增加：
+#    "hub": { "enabled": true, "url": "ws://<VPS>:9443/hub/agent", "token": "<Hub 令牌>" }
+#    启动后 agent 会主动外连 Hub 注册 —— 无需公网 IP、无需开放入站端口
+
+# 3) Mac 侧经 Hub 接入
+node apps/cli/dist/index.js connect <VPS> --port 9443 --hub-token <Hub 令牌> \
+     --hub-node win_01 --key <设备密钥> --name win_01
+```
+
+**安全模型**：Hub **只做字节透传**，不解析内容、不持有设备密钥 —— 控制端与被控端之间仍执行 Ed25519/PSK 端到端握手，因此 **Hub 无法窃听也无法伪造**。生产环境建议在 Hub 前挂 Caddy/Nginx 终止 TLS。
+
 ## 关键决策速览
 
 | 决策点 | 结论 |
diff --git a/apps/agent/src/config.ts b/apps/agent/src/config.ts
index bb3d1c7..b3b7b30 100644
--- a/apps/agent/src/config.ts
+++ b/apps/agent/src/config.ts
@@ -52,6 +52,19 @@ export interface AgentConfig {
    * 非空 = 只允许读写这些目录之下的路径。
    */
   fs_roots?: string[];
+  /**
+   * v6：Hub 模式。启用后**不再监听本地端口**，改为主动外连 Hub 注册，
+   * 适用于被控端位于 NAT / 无公网 IP 的环境。
+   */
+  hub?: {
+    enabled: boolean;
+    /** Hub 地址，例如 wss://hub.example.com/hub/agent */
+    url: string;
+    /** Hub 令牌 */
+    token: string;
+    /** 跳过 Hub 证书校验（自签证书场景） */
+    insecure?: boolean;
+  };
 }
 
 /** 数据目录：优先 NODEAGENT_HOME（跨平台一致），否则 ~/.nodeagent。 */
diff --git a/apps/agent/src/hub-mode.ts b/apps/agent/src/hub-mode.ts
new file mode 100644
index 0000000..4f1afcb
--- /dev/null
+++ b/apps/agent/src/hub-mode.ts
@@ -0,0 +1,106 @@
+import { WebSocket } from 'ws';
+import type { AgentConfig } from './config.js';
+import { createAgentCore } from './server.js';
+
+export interface HubClientOptions {
+  /** 例如 wss://hub.example.com/hub/agent */
+  url: string;
+  token: string;
+  /** 跳过 Hub 证书校验（自签证书场景） */
+  insecure?: boolean;
+  /** 重连基础退避（默认 1s，指数增长至 30s） */
+  reconnectBaseMs?: number;
+}
+
+export interface HubClient {
+  isRegistered(): boolean;
+  stop(): void;
+}
+
+/**
+ * 被控端 Hub 模式：主动外连 Hub 注册，随后在该连接上提供 RPC 服务。
+ * 出站连接使其可工作于 NAT / 无公网 IP 的环境。
+ *
+ * 注册成功后 Hub 不再解析内容 —— 该连接上跑的就是与控制端的端到端 RPC。
+ */
+export function startHubClient(
+  cfg: AgentConfig,
+  opts: HubClientOptions,
+  log: (level: 'info' | 'warn', msg: string) => void,
+): HubClient {
+  const core = createAgentCore(cfg);
+  const baseMs = opts.reconnectBaseMs ?? 1000;
+
+  let sock: WebSocket | null = null;
+  let registered = false;
+  let stopped = false;
+  let attempts = 0;
+  let timer: NodeJS.Timeout | null = null;
+
+  const scheduleReconnect = (reason: string): void => {
+    registered = false;
+    if (stopped) return;
+    const delay = Math.min(baseMs * 2 ** attempts, 30_000);
+    attempts += 1;
+    log('warn', `${reason}，${delay}ms 后重连 Hub（第 ${attempts} 次）`);
+    timer = setTimeout(connect, delay);
+    timer.unref?.();
+  };
+
+  function connect(): void {
+    if (stopped) return;
+    log('info', `正在连接 Hub ${opts.url}`);
+    const s = new WebSocket(opts.url, { rejectUnauthorized: opts.insecure !== true });
+    sock = s;
+
+    // 注册阶段的控制面处理；注册成功后即卸载，交由 core 接管 RPC
+    const onHubMessage = (raw: { toString(): string }): void => {
+      let msg: { type?: string; message?: string };
+      try {
+        msg = JSON.parse(raw.toString()) as { type?: string; message?: string };
+      } catch {
+        return;
+      }
+      if (msg.type === 'registered') {
+        registered = true;
+        attempts = 0;
+        log('info', `已注册到 Hub（node_id=${cfg.node_id}），进入服务状态`);
+        s.off('message', onHubMessage);
+        core.attach(s, 'hub');
+        return;
+      }
+      if (msg.type === 'error') {
+        log('warn', `Hub 拒绝: ${msg.message ?? ''}`);
+      }
+    };
+
+    s.on('open', () => {
+      s.send(
+        JSON.stringify({
+          type: 'register',
+          node_id: cfg.node_id,
+          token: opts.token,
+          meta: { platform: process.platform, auth_mode: cfg.auth_mode ?? 'psk' },
+        }),
+      );
+    });
+    s.on('message', onHubMessage);
+    s.on('close', () => scheduleReconnect('Hub 连接已关闭'));
+    s.on('error', (err: Error) => log('warn', `Hub 连接错误: ${err.message}`));
+  }
+
+  connect();
+
+  return {
+    isRegistered: () => registered,
+    stop: () => {
+      stopped = true;
+      if (timer) clearTimeout(timer);
+      try {
+        sock?.close();
+      } catch {
+        /* 忽略 */
+      }
+    },
+  };
+}
diff --git a/apps/agent/src/index.ts b/apps/agent/src/index.ts
index 71638ab..28b0a00 100644
--- a/apps/agent/src/index.ts
+++ b/apps/agent/src/index.ts
@@ -5,6 +5,7 @@ import { ensureCert } from './certs.js';
 import { createAgentServer } from './server.js';
 import { initAudit, audit, auditFilePath } from './audit.js';
 import { startBeacon, DEFAULT_DISCOVERY_PORT, type Beacon } from './discovery.js';
+import { startHubClient, type HubClient } from './hub-mode.js';
 
 function listLocalIps(): string[] {
   const out: string[] = [];
@@ -24,8 +25,19 @@ async function main(): Promise<void> {
     maxFiles: config.audit?.max_files,
     logArgs: config.audit?.log_args,
   });
-  const tls = config.tls ? ensureCert() : null;
-  const server = await createAgentServer(config, tls);
+  // v6：Hub 模式下不监听本地端口，改为主动外连 Hub（穿 NAT）
+  const useHub = config.hub?.enabled === true;
+  const tls = !useHub && config.tls ? ensureCert() : null;
+  const server = useHub ? null : await createAgentServer(config, tls);
+
+  let hubClient: HubClient | null = null;
+  if (useHub && config.hub) {
+    hubClient = startHubClient(
+      config,
+      { url: config.hub.url, token: config.hub.token, insecure: config.hub.insecure },
+      (level, msg) => console.log(`[${new Date().toISOString()}] [${level.toUpperCase()}] ${msg}`),
+    );
+  }
 
   const auditMode = config.auth_mode ?? 'psk';
   audit({
@@ -38,7 +50,7 @@ async function main(): Promise<void> {
   // v4：局域网心跳广播（报文不含任何凭据）
   const beacon: Beacon | null = startBeacon(
     {
-      enabled: config.discovery?.enabled !== false,
+      enabled: !useHub && config.discovery?.enabled !== false,
       port: config.discovery?.port ?? DEFAULT_DISCOVERY_PORT,
       broadcast: config.discovery?.broadcast ?? '255.255.255.255',
       intervalMs: config.discovery?.interval_ms ?? 5000,
@@ -58,7 +70,13 @@ async function main(): Promise<void> {
   console.log('  nodeagent 被控端已启动');
   console.log('  ─────────────────────────────────────────────');
   console.log(`  节点 ID    : ${config.node_id}`);
-  console.log(`  监听地址   : ${config.host}:${config.port} (${config.tls ? 'wss / TLS' : 'ws / 明文'})`);
+  console.log(
+    `  接入方式   : ${
+      useHub
+        ? `Hub 中转 → ${config.hub?.url ?? ''}`
+        : `本地监听 ${config.host}:${config.port} (${config.tls ? 'wss / TLS' : 'ws / 明文'})`
+    }`,
+  );
   console.log(`  本机 IP    : ${ips.join(', ') || '未检测到'}`);
   console.log(`  能力       : ${CAPABILITY_MANIFEST.length} 项`);
   console.log(`  认证模式   : ${auditMode}${auditMode === 'ed25519' ? `（已登记 ${config.acl?.clients.length ?? 0} 个调用方）` : ''}`);
@@ -80,8 +98,9 @@ async function main(): Promise<void> {
   const shutdown = async (): Promise<void> => {
     console.log('\n正在关闭...');
     beacon?.stop();
+    hubClient?.stop();
     audit({ type: 'agent.stop', reason: 'signal' });
-    await server.close();
+    if (server) await server.close();
     process.exit(0);
   };
   process.on('SIGINT', () => void shutdown());
diff --git a/apps/agent/src/server.ts b/apps/agent/src/server.ts
index 022745e..7b5224c 100644
--- a/apps/agent/src/server.ts
+++ b/apps/agent/src/server.ts
@@ -48,7 +48,13 @@ export interface AgentServer {
 type LogLevel = 'debug' | 'info' | 'warn';
 
 /** 创建并启动被控端 WebSocket 服务。 */
-export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Promise<AgentServer> {
+/** 连接级 RPC 处理 —— 监听模式与 Hub 模式共用同一套鉴权 / ACL / 能力分发。 */
+export interface AgentCore {
+  /** 在给定连接上提供被控端服务（连接已建立）。 */
+  attach(ws: WebSocket, remote: string): void;
+}
+
+export function createAgentCore(cfg: AgentConfig): AgentCore {
   const capabilityRegistry = createCapabilityRegistry(cfg);
   /** v3：本次实例采用的认证模式（psk 向后兼容 / ed25519 零信任） */
   const authMode: 'psk' | 'ed25519' = cfg.auth_mode === 'ed25519' ? 'ed25519' : 'psk';
@@ -75,13 +81,6 @@ export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Pr
     }
   };
 
-  // TLS 必须由 https server 承载：ws 的 WebSocketServer 不识别 cert/key 选项，
-  // 直接传入会被静默忽略，导致「自称 wss、实为明文」的降级。
-  const httpServer = tls
-    ? createHttpsServer({ cert: tls.cert, key: tls.key })
-    : createHttpServer();
-  const wss = new WebSocketServer({ server: httpServer });
-
   const states = new WeakMap<WebSocket, ConnState>();
 
   const send = (ws: WebSocket, msg: unknown): void => {
@@ -102,6 +101,10 @@ export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Pr
     state.nonce = generateNonce();
     state.nonceExpiresAt = Date.now() + NONCE_TTL_MS;
     state.clientId = params?.client_id ?? null;
+    // 新一轮握手开始：清除上一轮的认证态与授权
+    // （Hub 模式下同一连接会被不同控制端先后复用，必须重置，否则存在越权风险）
+    state.authenticated = false;
+    state.authorized = null;
     sendResult(ws, req.id, { nonce: state.nonce, expires_at: state.nonceExpiresAt });
   }
 
@@ -318,8 +321,7 @@ export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Pr
     }
   }
 
-  wss.on('connection', (ws, req) => {
-    const remote = req.socket.remoteAddress ?? '?';
+  function attachConnection(ws: WebSocket, remote: string): void {
     log('info', `新连接: ${remote}`);
     states.set(ws, {
       authenticated: false,
@@ -334,7 +336,29 @@ export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Pr
     });
     ws.on('close', () => log('info', `连接关闭: ${remote}`));
     ws.on('error', (err: Error) => log('warn', `连接错误: ${err.message}`));
-  });
+  }
+
+  return { attach: attachConnection };
+}
+
+/** 监听模式：被控端在本地起 HTTP(S) + WebSocket 服务。 */
+export function createAgentServer(cfg: AgentConfig, tls: TlsMaterial | null): Promise<AgentServer> {
+  const core = createAgentCore(cfg);
+  const levelOrder: Record<LogLevel, number> = { debug: 0, info: 1, warn: 2 };
+  const log = (level: LogLevel, msg: string): void => {
+    if (levelOrder[level] >= levelOrder[cfg.log_level]) {
+      console.log(`[${new Date().toISOString()}] [${level.toUpperCase()}] ${msg}`);
+    }
+  };
+
+  // TLS 必须由 https server 承载：ws 的 WebSocketServer 不识别 cert/key 选项，
+  // 直接传入会被静默忽略，导致「自称 wss、实为明文」的降级。
+  const httpServer = tls
+    ? createHttpsServer({ cert: tls.cert, key: tls.key })
+    : createHttpServer();
+  const wss = new WebSocketServer({ server: httpServer });
+
+  wss.on('connection', (ws, req) => core.attach(ws, req.socket.remoteAddress ?? '?'));
 
   // WebSocket 层保活：30s ping，探测死连接
   const heartbeat = setInterval(() => {
diff --git a/apps/cli/src/index.ts b/apps/cli/src/index.ts
index 744208b..e899c48 100644
--- a/apps/cli/src/index.ts
+++ b/apps/cli/src/index.ts
@@ -107,6 +107,9 @@ interface Options {
   recursive?: boolean;
   pattern?: string;
   createDirs?: boolean;
+  /** v6 Hub */
+  hubToken?: string;
+  hubNode?: string;
 }
 
 function getClientConfig(): ClientConfig {
@@ -137,6 +140,7 @@ async function withClient<T>(fn: (client: NodeAgentClient) => Promise<T>, nodeNa
     insecure: profile.insecure,
     authMode: profile.auth_mode,
     privateKey: keys?.privateKey,
+    hub: profile.hub ? { token: profile.hub.token, nodeId: profile.hub.node_id } : undefined,
   });
   try {
     await client.connect();
@@ -206,6 +210,8 @@ async function cmdConnect(host: string, opts: Options): Promise<void> {
     auth_mode: authMode,
   };
   if (opts.note) profile.note = opts.note;
+  // v6：经 Hub 中转
+  if (opts.hubToken) profile.hub = { token: opts.hubToken, node_id: opts.hubNode ?? name };
 
   const keys = authMode === 'ed25519' ? loadKeys() : null;
   if (authMode === 'ed25519' && !keys) {
@@ -219,6 +225,7 @@ async function cmdConnect(host: string, opts: Options): Promise<void> {
     insecure: profile.insecure,
     authMode,
     privateKey: keys?.privateKey,
+    hub: profile.hub ? { token: profile.hub.token, nodeId: profile.hub.node_id } : undefined,
   });
   try {
     const caps = await client.connect();
@@ -231,8 +238,9 @@ async function cmdConnect(host: string, opts: Options): Promise<void> {
     cfg.current = name;
     saveConfig(cfg);
 
+    const via = profile.hub ? `经 Hub ${profile.host}:${profile.port}` : `${profile.host}:${profile.port}`;
     console.log(
-      `✓ 已连接并保存设备「${name}」${profile.host}:${profile.port}（${profile.tls ? 'wss' : 'ws'}，${authMode}）`,
+      `✓ 已连接并保存设备「${name}」${via}（${profile.tls ? 'wss' : 'ws'}，${authMode}）`,
     );
     console.log(`  配置: ${configPath()}（当前设备 ${name}，共 ${Object.keys(cfg.nodes).length} 台）`);
 
@@ -802,6 +810,8 @@ function parseOptions(rest: string[]): { opts: Options; positionals: string[] }
       recursive: { type: 'boolean', default: false },
       pattern: { type: 'string' },
       'create-dirs': { type: 'boolean', default: false },
+      'hub-token': { type: 'string' },
+      'hub-node': { type: 'string' },
     },
     allowPositionals: true,
     strict: false,
@@ -834,6 +844,8 @@ function parseOptions(rest: string[]): { opts: Options; positionals: string[] }
       recursive: Boolean(values['recursive']),
       pattern: values['pattern'] as string | undefined,
       createDirs: Boolean(values['create-dirs']),
+      hubToken: values['hub-token'] as string | undefined,
+      hubNode: values['hub-node'] as string | undefined,
     },
     positionals,
   };
diff --git a/apps/hub/package.json b/apps/hub/package.json
new file mode 100644
index 0000000..bd4eb33
--- /dev/null
+++ b/apps/hub/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "@nodeagent/hub",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "main": "./dist/index.js",
+  "bin": {
+    "nodeagent-hub": "./dist/index.js"
+  },
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "clean": "rm -rf dist",
+    "start": "node dist/index.js"
+  },
+  "dependencies": {
+    "@nodeagent/protocol": "workspace:*",
+    "ws": "^8.18.0"
+  },
+  "devDependencies": {
+    "@types/ws": "^8.5.13"
+  }
+}
diff --git a/apps/hub/src/config.ts b/apps/hub/src/config.ts
new file mode 100644
index 0000000..e7f73bb
--- /dev/null
+++ b/apps/hub/src/config.ts
@@ -0,0 +1,47 @@
+import { randomBytes } from 'node:crypto';
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'node:fs';
+import { homedir } from 'node:os';
+import { dirname, join } from 'node:path';
+
+export interface HubConfig {
+  node_id: string;
+  host: string;
+  port: number;
+  /** 鉴权令牌：被控端注册、控制端接入均需携带 */
+  token: string;
+  /**
+   * 可选 TLS。生产环境通常由反向代理（Caddy/Nginx）终止 TLS，
+   * 故此项默认关闭；如需 Hub 直接提供 TLS，给出 PEM 文件路径即可。
+   */
+  tls?: { cert_file: string; key_file: string };
+  log_level: 'debug' | 'info' | 'warn';
+}
+
+export function hubDir(): string {
+  return process.env['NODEAGENT_HOME'] ?? join(homedir(), '.nodeagent');
+}
+
+export function hubConfigPath(): string {
+  return join(hubDir(), 'hub.json');
+}
+
+export function defaultHubConfig(): HubConfig {
+  return {
+    node_id: 'hub_01',
+    host: '0.0.0.0',
+    port: 9443,
+    token: randomBytes(24).toString('hex'),
+    log_level: 'info',
+  };
+}
+
+export function loadHubConfig(): { config: HubConfig; isNew: boolean } {
+  const p = hubConfigPath();
+  if (existsSync(p)) {
+    return { config: JSON.parse(readFileSync(p, 'utf8')) as HubConfig, isNew: false };
+  }
+  const config = defaultHubConfig();
+  mkdirSync(dirname(p), { recursive: true });
+  writeFileSync(p, `${JSON.stringify(config, null, 2)}\n`, { mode: 0o600 });
+  return { config, isNew: true };
+}
diff --git a/apps/hub/src/hub.ts b/apps/hub/src/hub.ts
new file mode 100644
index 0000000..dea9a9d
--- /dev/null
+++ b/apps/hub/src/hub.ts
@@ -0,0 +1,236 @@
+import { readFileSync } from 'node:fs';
+import { createServer as createHttpServer, type IncomingMessage } from 'node:http';
+import { createServer as createHttpsServer } from 'node:https';
+import { WebSocket, WebSocketServer, type RawData } from 'ws';
+import type { HubConfig } from './config.js';
+import type {
+  HubClientConnect,
+  HubError,
+  HubInbound,
+  HubListRequest,
+  HubOutbound,
+  HubPaired,
+  HubRegistered,
+} from './types.js';
+
+type LogLevel = 'debug' | 'info' | 'warn';
+
+export interface AgentView {
+  node_id: string;
+  platform?: string;
+  version?: string;
+  connected_at: number;
+  paired: boolean;
+}
+
+interface AgentEntry {
+  node_id: string;
+  ws: WebSocket;
+  platform?: string;
+  version?: string;
+  connected_at: number;
+  /** 当前配对的客户端；同一时刻仅允许一个，避免多路复用复杂度 */
+  paired: WebSocket | null;
+}
+
+export interface HubServer {
+  url: string;
+  agents(): AgentView[];
+  close(): Promise<void>;
+}
+
+export function createHubServer(cfg: HubConfig): Promise<HubServer> {
+  const levelOrder: Record<LogLevel, number> = { debug: 0, info: 1, warn: 2 };
+  const log = (level: LogLevel, msg: string): void => {
+    if (levelOrder[level] >= levelOrder[cfg.log_level]) {
+      console.log(`[${new Date().toISOString()}] [${level.toUpperCase()}] ${msg}`);
+    }
+  };
+
+  const agents = new Map<string, AgentEntry>();
+
+  const httpServer = cfg.tls
+    ? createHttpsServer({ cert: readFileSync(cfg.tls.cert_file), key: readFileSync(cfg.tls.key_file) })
+    : createHttpServer();
+  const wss = new WebSocketServer({ server: httpServer });
+
+  const send = (ws: WebSocket, msg: HubOutbound): void => {
+    if (ws.readyState === WebSocket.OPEN) ws.send(JSON.stringify(msg));
+  };
+  const fail = (ws: WebSocket, code: HubError['code'], message: string): void => {
+    send(ws, { type: 'error', code, message });
+    setTimeout(() => ws.close(), 50);
+  };
+
+  /** 配对后双向透传；Hub 不再解析内容，端到端安全由双方自身的握手保证。 */
+  function pair(clientWs: WebSocket, entry: AgentEntry): void {
+    const agentWs = entry.ws;
+    entry.paired = clientWs;
+
+    const onClientMsg = (data: RawData, isBinary: boolean): void => {
+      if (agentWs.readyState === WebSocket.OPEN) agentWs.send(data, { binary: isBinary });
+    };
+    const onAgentMsg = (data: RawData, isBinary: boolean): void => {
+      if (clientWs.readyState === WebSocket.OPEN) clientWs.send(data, { binary: isBinary });
+    };
+    const detach = (): void => {
+      clientWs.off('message', onClientMsg);
+      agentWs.off('message', onAgentMsg);
+      if (entry.paired === clientWs) entry.paired = null;
+    };
+
+    clientWs.removeAllListeners('message');
+    agentWs.removeAllListeners('message');
+    clientWs.on('message', onClientMsg);
+    agentWs.on('message', onAgentMsg);
+
+    // 控制端断开：仅解绑，被控端保持在线等待下一个控制端
+    clientWs.once('close', detach);
+    // 被控端掉线：连带关闭控制端，让控制端及时感知
+    agentWs.once('close', () => {
+      detach();
+      if (clientWs.readyState === WebSocket.OPEN) clientWs.close();
+    });
+
+    send(clientWs, { type: 'paired', node_id: entry.node_id } satisfies HubPaired);
+    log('info', `配对成功 ${entry.node_id} ↔ 控制端`);
+  }
+
+  /** 解析 + 令牌校验；失败时已回错误消息并关闭连接。 */
+  function readControl(ws: WebSocket, raw: string, remote: string): HubInbound | null {
+    let msg: HubInbound;
+    try {
+      msg = JSON.parse(raw) as HubInbound;
+    } catch {
+      fail(ws, 'E_BAD_REQUEST', '消息不是合法 JSON');
+      return null;
+    }
+    if (msg.token !== cfg.token) {
+      log('warn', `鉴权失败（令牌不匹配）from ${remote}`);
+      fail(ws, 'E_HUB_AUTH', 'Hub 令牌错误');
+      return null;
+    }
+    return msg;
+  }
+
+  // ---------------- 被控端接入 ----------------
+
+  function handleAgentSocket(ws: WebSocket, remote: string): void {
+    let registeredId: string | null = null;
+
+    const onMessage = (data: RawData): void => {
+      if (registeredId) return; // 注册后不再受理控制面消息
+      const msg = readControl(ws, data.toString(), remote);
+      if (!msg) return;
+      if (msg.type !== 'register') {
+        fail(ws, 'E_BAD_REQUEST', `被控端不应发送 ${msg.type}`);
+        return;
+      }
+
+      const nodeId = msg.node_id;
+      const existing = agents.get(nodeId);
+      if (existing && existing.ws.readyState === WebSocket.OPEN) {
+        log('warn', `节点 ${nodeId} 重复注册，踢掉旧连接`);
+        existing.ws.close();
+      }
+
+      const entry: AgentEntry = {
+        node_id: nodeId,
+        ws,
+        platform: msg.meta?.platform,
+        version: msg.meta?.version,
+        connected_at: Date.now(),
+        paired: null,
+      };
+      agents.set(nodeId, entry);
+      registeredId = nodeId;
+      send(ws, { type: 'registered', node_id: nodeId } satisfies HubRegistered);
+      log('info', `被控端已注册 ${nodeId} from ${remote}（platform=${msg.meta?.platform ?? '?'}）`);
+    };
+
+    ws.on('message', onMessage);
+    ws.once('close', () => {
+      if (registeredId && agents.get(registeredId)?.ws === ws) {
+        agents.delete(registeredId);
+        log('info', `被控端已离线 ${registeredId}`);
+      }
+    });
+  }
+
+  // ---------------- 控制端接入 ----------------
+
+  function handleClientSocket(ws: WebSocket, remote: string): void {
+    const onMessage = (data: RawData): void => {
+      const msg = readControl(ws, data.toString(), remote);
+      if (!msg) return;
+
+      if (msg.type === 'list') {
+        send(ws, {
+          type: 'list.result',
+          agents: [...agents.values()].map((a) => ({
+            node_id: a.node_id,
+            platform: a.platform,
+            connected_at: a.connected_at,
+            paired: a.paired !== null,
+          })),
+        });
+        return;
+      }
+
+      if (msg.type !== 'connect') {
+        fail(ws, 'E_BAD_REQUEST', `控制端不应发送 ${msg.type}`);
+        return;
+      }
+
+      const entry = agents.get((msg as HubClientConnect).node_id);
+      if (!entry || entry.ws.readyState !== WebSocket.OPEN) {
+        fail(ws, 'E_NODE_OFFLINE', `设备离线: ${msg.node_id}`);
+        return;
+      }
+      if (entry.paired) {
+        fail(ws, 'E_NODE_BUSY', `设备正被其他控制端占用: ${msg.node_id}`);
+        return;
+      }
+      log('info', `控制端请求接入 ${msg.node_id} from ${remote}`);
+      pair(ws, entry);
+    };
+
+    ws.on('message', onMessage);
+  }
+
+  wss.on('connection', (ws: WebSocket, req: IncomingMessage) => {
+    const url = new URL(req.url ?? '/', 'http://localhost');
+    const path = url.pathname.replace(/\/+$/, '');
+    const remote = req.socket.remoteAddress ?? '?';
+
+    if (path === '/hub/agent') handleAgentSocket(ws, remote);
+    else if (path === '/hub/client') handleClientSocket(ws, remote);
+    else fail(ws, 'E_BAD_REQUEST', `未知路径: ${path}（应使用 /hub/agent 或 /hub/client）`);
+  });
+
+  return new Promise<HubServer>((resolve, reject) => {
+    httpServer.once('error', reject);
+    httpServer.once('listening', () => {
+      const scheme = cfg.tls ? 'wss' : 'ws';
+      log('info', `Hub 已监听 ${scheme}://${cfg.host}:${cfg.port}`);
+      resolve({
+        url: `${scheme}://${cfg.host}:${cfg.port}`,
+        agents: () =>
+          [...agents.values()].map((a) => ({
+            node_id: a.node_id,
+            platform: a.platform,
+            version: a.version,
+            connected_at: a.connected_at,
+            paired: a.paired !== null,
+          })),
+        close: () =>
+          new Promise<void>((res) => {
+            for (const a of agents.values()) a.ws.terminate();
+            for (const ws of wss.clients) ws.terminate();
+            wss.close(() => httpServer.close(() => res()));
+          }),
+      });
+    });
+    httpServer.listen(cfg.port, cfg.host);
+  });
+}
diff --git a/apps/hub/src/index.ts b/apps/hub/src/index.ts
new file mode 100644
index 0000000..fa04a5c
--- /dev/null
+++ b/apps/hub/src/index.ts
@@ -0,0 +1,36 @@
+import { hubConfigPath, loadHubConfig } from './config.js';
+import { createHubServer } from './hub.js';
+
+async function main(): Promise<void> {
+  const { config, isNew } = loadHubConfig();
+  const server = await createHubServer(config);
+
+  console.log('');
+  console.log('  nodeagent Hub 已启动（中转节点）');
+  console.log('  ─────────────────────────────────────────────');
+  console.log(`  节点 ID   : ${config.node_id}`);
+  console.log(`  监听      : ${server.url}`);
+  console.log(`  配置文件  : ${hubConfigPath()}`);
+  console.log(`  Hub 令牌  : ${config.token}`);
+  console.log('');
+  console.log('  被控端接入 : 在 agent.json 配置 hub: { url, token } 后启动 agent');
+  console.log(`  控制端接入 : nodeagent connect <hub-主机> --port ${config.port} --hub --key <设备密钥>`);
+  console.log('');
+  console.log('  安全说明   : Hub 只透传字节流，不解析内容 ——');
+  console.log('               控制端与被控端仍执行自有握手，Hub 无法解密或伪造。');
+  if (isNew) {
+    console.log('');
+    console.log('  ⚠️  首次启动，已生成 Hub 令牌，请一并配置到被控端与控制端。');
+  }
+  console.log('');
+
+  const shutdown = async (): Promise<void> => {
+    console.log('\n正在关闭...');
+    await server.close();
+    process.exit(0);
+  };
+  process.on('SIGINT', () => void shutdown());
+  process.on('SIGTERM', () => void shutdown());
+}
+
+await main();
diff --git a/apps/hub/src/types.ts b/apps/hub/src/types.ts
new file mode 100644
index 0000000..40ca282
--- /dev/null
+++ b/apps/hub/src/types.ts
@@ -0,0 +1,52 @@
+/**
+ * Hub 控制面消息。
+ *
+ * 配对成功后即进入**透传**模式 —— Hub 不再解析内容，
+ * 控制端与被控端之间的鉴权/加密由各自的 v3 握手保证（端到端）。
+ */
+
+export interface HubAgentRegister {
+  type: 'register';
+  node_id: string;
+  token: string;
+  meta?: {
+    platform?: string;
+    version?: string;
+    auth_mode?: string;
+  };
+}
+
+export interface HubClientConnect {
+  type: 'connect';
+  node_id: string;
+  token: string;
+}
+
+export interface HubListRequest {
+  type: 'list';
+  token: string;
+}
+
+export interface HubRegistered {
+  type: 'registered';
+  node_id: string;
+}
+
+export interface HubPaired {
+  type: 'paired';
+  node_id: string;
+}
+
+export interface HubListResult {
+  type: 'list.result';
+  agents: Array<{ node_id: string; platform?: string; connected_at: number; paired: boolean }>;
+}
+
+export interface HubError {
+  type: 'error';
+  code: 'E_HUB_AUTH' | 'E_NODE_OFFLINE' | 'E_NODE_BUSY' | 'E_BAD_REQUEST';
+  message: string;
+}
+
+export type HubInbound = HubAgentRegister | HubClientConnect | HubListRequest;
+export type HubOutbound = HubRegistered | HubPaired | HubListResult | HubError;
diff --git a/apps/hub/tsconfig.json b/apps/hub/tsconfig.json
new file mode 100644
index 0000000..c99ec7b
--- /dev/null
+++ b/apps/hub/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*.ts"]
+}
diff --git a/docs/DEVELOPMENT.md b/docs/DEVELOPMENT.md
index 748f512..422450d 100644
--- a/docs/DEVELOPMENT.md
+++ b/docs/DEVELOPMENT.md
@@ -600,6 +600,35 @@ CLI 便捷命令：`ls` / `stat` / `cat` / `pull` / `push`（pull 与 push 自
 
 > **实测**：E2E 覆盖 —— 写入 → 读回 → 递归列表 → **1.5MB 分块重组 sha256 一致** → append 语义 → 白名单越界被拒。
 
+### 6.8 Hub 中转（v6）
+
+用于被控端位于 NAT 后 / 与控制端不在同一网段的场景。
+
+```
+控制端 ──► Hub ──► 被控端
+             ↑ 字节透传，不认识 RPC 内容
+```
+
+| 环节 | 设计 |
+|---|---|
+| 被控端接入 | **主动外连** `ws(s)://hub/hub/agent`，发 `register`（node_id + Hub 令牌 + 元信息）→ 免公网 IP、免入站放行 |
+| 控制端接入 | 连 `ws(s)://hub/hub/client`，发 `connect`（node_id + Hub 令牌）→ Hub 回 `paired` |
+| 配对之后 | **双向字节透传**：Hub 卸载自身消息监听，仅做 `send` 转发，不再解析 |
+| 连接语义 | 控制端断开 → 仅解绑配对，**被控端保持在线**；被控端掉线 → 连带关闭控制端 |
+| 并发模型 | 同一被控端同一时刻只服务一个控制端（避免多路复用复杂度），占用时返回 `E_NODE_BUSY` |
+| 鉴权 | Hub 令牌（被控端/控制端共用）；`list` 可查在线设备 |
+
+**安全边界**：Hub 位于信任边界之外 —— 它不持有设备密钥，也无法解密业务流量（端到端握手绕不过去）。因此：
+
+- Hub 被攻陷 ≠ 设备被接管（攻击者仍需通过设备侧鉴权）
+- Hub 能审计「哪些设备在线」，但看不到「做了什么」（那是被控端本地审计的职责）
+
+**连接复用注意**：Hub 模式下同一连接会被不同控制端先后复用，故被控端在 `hello` 时必须**重置认证态与授权**（已实现），否则存在越权风险。
+
+**TLS**：默认由反向代理终止（Caddy/Nginx），Hub 也可通过 `tls.cert_file` / `tls.key_file` 直接提供。
+
+> **实测**：E2E 覆盖 —— 经 Hub 完成端到端握手并调用 / Hub 令牌错误被拒 / 目标设备不存在 / 控制端断开后被控端仍可再次接入。
+
 ---
 
 ## 第 7 章 各端实现指南
diff --git a/packages/client/src/client.ts b/packages/client/src/client.ts
index f3e8e79..f211254 100644
--- a/packages/client/src/client.ts
+++ b/packages/client/src/client.ts
@@ -52,6 +52,8 @@ export interface ClientOptions {
   maxReconnectDelayMs?: number;
   /** v4：连接状态变化回调 */
   onStateChange?: (state: 'connected' | 'reconnecting' | 'closed') => void;
+  /** v6：经 Hub 中转（URL 需指向 `/hub/client`） */
+  hub?: { token: string; nodeId: string };
   /** 日志回调 */
   onLog?: (msg: string) => void;
 }
@@ -96,7 +98,19 @@ export class NodeAgentClient {
       ws.once('open', () => {
         clearTimeout(timer);
         onLog?.(`已连接 ${url}`);
-        resolve();
+        // Hub 模式下先完成配对，再挂 RPC 处理器（否则控制面消息会被误当响应）
+        const ready: Promise<void> = this.opts.hub
+          ? this.pairViaHub(ws, this.opts.hub, handshakeTimeoutMs)
+          : Promise.resolve();
+        ready
+          .then(() => {
+            ws.on('message', (raw: WebSocket.RawData) => this.handleMessage(raw.toString()));
+            resolve();
+          })
+          .catch((err: unknown) => {
+            ws.terminate();
+            reject(err instanceof Error ? err : new Error(String(err)));
+          });
       });
       ws.once('error', (err: Error) => {
         clearTimeout(timer);
@@ -108,7 +122,6 @@ export class NodeAgentClient {
         }
       });
 
-      ws.on('message', (raw: WebSocket.RawData) => this.handleMessage(raw.toString()));
       ws.on('close', () => this.handleClose());
     });
 
@@ -216,6 +229,42 @@ export class NodeAgentClient {
     }
   }
 
+  /** v6：Hub 配对（控制面消息，非 JSON-RPC）。配对后该连接即为到被控端的透明通道。 */
+  private pairViaHub(ws: WebSocket, hub: { token: string; nodeId: string }, timeoutMs: number): Promise<void> {
+    return new Promise<void>((resolve, reject) => {
+      const onMessage = (raw: WebSocket.RawData): void => {
+        let msg: { type?: string; code?: string; message?: string };
+        try {
+          msg = JSON.parse(raw.toString()) as { type?: string; code?: string; message?: string };
+        } catch {
+          return;
+        }
+        if (msg.type === 'paired') {
+          clearTimeout(timer);
+          ws.off('message', onMessage);
+          this.opts.onLog?.(`Hub 配对成功（node_id=${hub.nodeId}）`);
+          resolve();
+          return;
+        }
+        if (msg.type === 'error') {
+          clearTimeout(timer);
+          ws.off('message', onMessage);
+          // Hub 令牌错误属鉴权问题，其余（离线/占用）归为不可达
+          const code = msg.code === 'E_HUB_AUTH' ? ErrorCodes.AUTH_FAILED : ErrorCodes.NODE_OFFLINE;
+          reject(new ClientError(code, msg.code ?? 'E_HUB', msg.message ?? 'Hub 拒绝接入'));
+        }
+      };
+
+      const timer = setTimeout(() => {
+        ws.off('message', onMessage);
+        reject(new ClientError(ErrorCodes.TIMEOUT, 'E_TIMEOUT', 'Hub 配对超时'));
+      }, timeoutMs);
+
+      ws.on('message', onMessage);
+      ws.send(JSON.stringify({ type: 'connect', node_id: hub.nodeId, token: hub.token }));
+    });
+  }
+
   private handleClose(): void {
     if (this.closed) return;
     this.closed = true;
diff --git a/packages/client/src/config.ts b/packages/client/src/config.ts
index 96eb971..bd5712b 100644
--- a/packages/client/src/config.ts
+++ b/packages/client/src/config.ts
@@ -15,6 +15,16 @@ export interface NodeProfile {
   auth_mode?: 'psk' | 'ed25519';
   /** 覆盖全局 client_id（同一控制端接入多台时可区分身份） */
   client_id?: string;
+  /**
+   * v6：经 Hub 中转接入。填写后连接走 `/hub/client`，
+   * 并在握手前完成 Hub 配对（Hub 只透传，端到端安全不受影响）。
+   */
+  hub?: {
+    /** Hub 令牌 */
+    token: string;
+    /** 目标被控端的 node_id */
+    node_id: string;
+  };
   /** 备注，便于识别 */
   note?: string;
 }
@@ -105,10 +115,11 @@ export function resolveTarget(cfg: ClientConfig, name?: string): ResolvedTarget
   return { name: target, profile, clientId: profile.client_id ?? cfg.client_id };
 }
 
-/** 解析连接目标为 WebSocket URL。 */
-export function toWsUrl(profile: { host: string; port: number; tls: boolean }): string {
+/** 解析连接目标为 WebSocket URL（经 Hub 时附上 /hub/client 路径）。 */
+export function toWsUrl(profile: { host: string; port: number; tls: boolean; hub?: unknown }): string {
   const scheme = profile.tls ? 'wss' : 'ws';
-  return `${scheme}://${profile.host}:${profile.port}`;
+  const path = profile.hub ? '/hub/client' : '';
+  return `${scheme}://${profile.host}:${profile.port}${path}`;
 }
 
 export function emptyConfig(clientId = 'mac_01'): ClientConfig {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2617fb1..e0f4eec 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -40,6 +40,19 @@ importers:
         specifier: workspace:*
         version: link:../../packages/protocol
 
+  apps/hub:
+    dependencies:
+      '@nodeagent/protocol':
+        specifier: workspace:*
+        version: link:../../packages/protocol
+      ws:
+        specifier: ^8.18.0
+        version: 8.21.3
+    devDependencies:
+      '@types/ws':
+        specifier: ^8.5.13
+        version: 8.18.1
+
   apps/mcp:
     dependencies:
       '@modelcontextprotocol/sdk':
diff --git a/tests/e2e/run.mjs b/tests/e2e/run.mjs
index 4e11008..c68785b 100644
--- a/tests/e2e/run.mjs
+++ b/tests/e2e/run.mjs
@@ -28,6 +28,10 @@ const RECONNECT_PORT = 18798;
 const RECONNECT_KEY = 'reconnect-key-0123456789abcdef0123456789';
 const FS_PORT = 18799;
 const FS_KEY = 'fs-key-0123456789abcdef0123456789abcdef';
+const HUB_PORT = 18800;
+const HUB_AGENT_PORT = 18801;
+const HUB_TOKEN = 'hub-e2e-token-0123456789abcdef';
+const HUB_AGENT_KEY = 'hub-agent-key-0123456789abcdef0123';
 const KEY = 'e2e-test-key-0123456789abcdef0123456789abcdef';
 const URL = `ws://127.0.0.1:${PORT}`;
 
@@ -524,6 +528,86 @@ async function testFileTransfer() {
   }
 }
 
+/** v6 场景：Hub 中转 —— 被控端主动注册，控制端经 Hub 配对后跑端到端握手。 */
+async function testHubMode() {
+  const hubHome = mkdtempSync(join(tmpdir(), 'nodeagent-hub-'));
+  const agentHome = mkdtempSync(join(tmpdir(), 'nodeagent-hubagent-'));
+  const spawnWith = (home, script) =>
+    spawn(process.execPath, [join(root, script)], {
+      env: { ...process.env, NODEAGENT_HOME: home, HOME: home, USERPROFILE: home },
+      stdio: ['ignore', 'pipe', 'pipe'],
+    });
+
+  writeFileSync(
+    join(hubHome, 'hub.json'),
+    JSON.stringify({ node_id: 'hub_e2e', host: '127.0.0.1', port: HUB_PORT, token: HUB_TOKEN, log_level: 'warn' }),
+  );
+  writeFileSync(
+    join(agentHome, 'agent.json'),
+    JSON.stringify({
+      node_id: 'hub_node',
+      host: '127.0.0.1',
+      port: HUB_AGENT_PORT,
+      tls: false,
+      key: HUB_AGENT_KEY,
+      log_level: 'warn',
+      discovery: { enabled: false },
+      hub: { enabled: true, url: `ws://127.0.0.1:${HUB_PORT}/hub/agent`, token: HUB_TOKEN },
+    }),
+  );
+
+  const hubProc = spawnWith(hubHome, 'apps/hub/dist/index.js');
+  const agentProc = spawnWith(agentHome, 'apps/agent/dist/index.js');
+  hubProc.stderr.on('data', (d) => process.stderr.write(`[hub] ${d}`));
+  agentProc.stderr.on('data', (d) => process.stderr.write(`[hub-agent] ${d}`));
+
+  const url = `ws://127.0.0.1:${HUB_PORT}/hub/client`;
+  const mk = (token, nodeId) =>
+    new NodeAgentClient({ url, key: HUB_AGENT_KEY, clientId: 'hub_test', hub: { token, nodeId } });
+
+  try {
+    // 等被控端注册到 Hub
+    await new Promise((r) => setTimeout(r, 2500));
+
+    // 1. 正常链路：经 Hub 握手并调用
+    const c = mk(HUB_TOKEN, 'hub_node');
+    const caps = await c.connect();
+    assert.ok(caps.length >= 19, `经 Hub 应拿到完整能力清单，实际 ${caps.length}`);
+    const info = await c.invoke('system.info');
+    assert.equal(info.status, 'ok', '经 Hub 的调用应成功');
+    c.close();
+
+    // 2. Hub 令牌错误 → 鉴权失败
+    await assert.rejects(
+      () => mk('wrong-token', 'hub_node').connect(),
+      (e) => {
+        assert.equal(e.code, -32401, `期望 -32401（鉴权失败），实际 ${e.code}`);
+        return true;
+      },
+    );
+
+    // 3. 目标设备不存在 → 不可达
+    await assert.rejects(
+      () => mk(HUB_TOKEN, 'ghost_node').connect(),
+      (e) => {
+        assert.equal(e.code, -32405, `期望 -32405（设备离线），实际 ${e.code}`);
+        return true;
+      },
+    );
+
+    // 4. 被控端应保持在线（前一次控制端断开不应把它踢下线）
+    const c2 = mk(HUB_TOKEN, 'hub_node');
+    await c2.connect();
+    const st = await c2.invoke('system.status');
+    assert.equal(st.status, 'ok', '被控端应仍在线可再次接入');
+    c2.close();
+  } finally {
+    hubProc.kill();
+    agentProc.kill();
+    await new Promise((r) => setTimeout(r, 400));
+  }
+}
+
 async function main() {
   console.log('\nnodeagent 端到端测试\n');
   const agent = startAgent();
@@ -716,6 +800,9 @@ async function main() {
 
     // ---------- v5 文件传输 ----------
     await test('v5 文件传输：写入→读回→列表→分块重组→append→白名单', testFileTransfer);
+
+    // ---------- v6 Hub 中转 ----------
+    await test('v6 Hub 中转：注册→配对→端到端握手→多次接入', testHubMode);
   } finally {
     agent.kill('SIGTERM');
     await new Promise((r) => setTimeout(r, 300));