diff --git a/web/static/i18n/en-US.json b/web/static/i18n/en-US.json
index bf52aa7e..3ab8a6dc 100644
--- a/web/static/i18n/en-US.json
+++ b/web/static/i18n/en-US.json
@@ -789,6 +789,7 @@
     "nav": {
       "basic": "Basic",
       "knowledge": "Knowledge base",
+      "c2": "C2",
       "robots": "Bots",
       "terminal": "Terminal",
       "security": "Security",
@@ -800,6 +801,12 @@
     "knowledge": {
       "title": "Knowledge base"
     },
+    "c2": {
+      "title": "C2",
+      "sectionTitle": "Built-in C2",
+      "enableLabel": "Enable built-in C2 (listeners, sessions, payloads, MCP tools)",
+      "enableHint": "When off, listeners are not started and C2 MCP tools are not registered; the C2 sidebar is hidden—useful for local-only chat/knowledge deployments. Click Apply to save."
+    },
     "robots": {
       "title": "Bot settings",
       "description": "Configure WeCom, DingTalk and Lark bots so you can chat with CyberStrikeAI on your phone without opening the web UI.",
diff --git a/web/static/i18n/zh-CN.json b/web/static/i18n/zh-CN.json
index f060c313..adcbce99 100644
--- a/web/static/i18n/zh-CN.json
+++ b/web/static/i18n/zh-CN.json
@@ -778,6 +778,7 @@
     "nav": {
       "basic": "基本设置",
       "knowledge": "知识库",
+      "c2": "C2",
       "robots": "机器人设置",
       "terminal": "终端",
       "security": "安全设置",
@@ -789,6 +790,12 @@
     "knowledge": {
       "title": "知识库设置"
     },
+    "c2": {
+      "title": "C2 设置",
+      "sectionTitle": "内置 C2",
+      "enableLabel": "启用内置 C2（监听器、会话、Payload、MCP 工具等）",
+      "enableHint": "关闭后不再启动监听器、不注册 C2 相关 MCP 工具，侧栏 C2 入口将隐藏；仅本机使用对话与知识库时可关闭以节省资源。修改后请点击「应用配置」。"
+    },
     "robots": {
       "title": "机器人设置",
       "description": "配置企业微信、钉钉、飞书等机器人，在手机端直接与 CyberStrikeAI 对话，无需在服务器上打开网页。",
diff --git a/web/static/js/router.js b/web/static/js/router.js
index a53ee2a8..c5ae75d4 100644
--- a/web/static/js/router.js
+++ b/web/static/js/router.js
@@ -65,6 +65,9 @@ function initRouter() {
 
 // 切换页面
 function switchPage(pageId) {
+    if (typeof window.syncC2NavOnceFromServer === 'function') {
+        void window.syncC2NavOnceFromServer();
+    }
     // 隐藏所有页面
     document.querySelectorAll('.page').forEach(page => {
         page.classList.remove('active');
diff --git a/web/static/js/settings.js b/web/static/js/settings.js
index ebf30611..da45e95e 100644
--- a/web/static/js/settings.js
+++ b/web/static/js/settings.js
@@ -29,6 +29,42 @@ let toolsPagination = {
     totalPages: 0
 };
 
+let c2NavSyncedOnce = false;
+
+/** 首次进入仪表盘等页面前拉一次配置，隐藏侧栏 C2（避免禁用后仍显示） */
+window.syncC2NavOnceFromServer = async function syncC2NavOnceFromServer() {
+    if (c2NavSyncedOnce || typeof apiFetch === 'undefined') {
+        return;
+    }
+    c2NavSyncedOnce = true;
+    try {
+        const r = await apiFetch('/api/config');
+        if (r.ok) {
+            const cfg = await r.json();
+            syncC2NavFromConfig(cfg);
+        }
+    } catch (_) {
+        /* ignore */
+    }
+};
+
+// 根据 C2 是否启用显示主导航 C2 入口与仪表盘 C2 区块（与 /api/config 的 c2.enabled 一致）
+function syncC2NavFromConfig(cfg) {
+    const on = cfg && cfg.c2 && cfg.c2.enabled !== false;
+    const nav = document.getElementById('nav-c2');
+    if (nav) {
+        nav.style.display = on ? '' : 'none';
+    }
+    const dash = document.getElementById('dashboard-section-c2');
+    if (dash) {
+        if (!on) {
+            dash.hidden = true;
+        } else {
+            dash.removeAttribute('hidden');
+        }
+    }
+}
+
 // 切换设置分类
 function switchSettingsSection(section) {
     // 更新导航项状态
@@ -274,6 +310,12 @@ async function loadConfig(loadTools = true) {
             }
         }
 
+        const c2EnabledCb = document.getElementById('c2-enabled');
+        if (c2EnabledCb) {
+            c2EnabledCb.checked = currentConfig.c2?.enabled !== false;
+        }
+        syncC2NavFromConfig(currentConfig);
+
         // 填充机器人配置
         const robots = currentConfig.robots || {};
         const wecom = robots.wecom || {};
@@ -975,6 +1017,9 @@ async function applySettings() {
         const knowledgeEnabled = knowledgeEnabledCheckbox ? knowledgeEnabledCheckbox.checked : true;
         
         // 收集知识库配置
+        const c2EnabledCheckbox = document.getElementById('c2-enabled');
+        const c2Enabled = c2EnabledCheckbox ? c2EnabledCheckbox.checked : true;
+
         const knowledgeConfig = {
             enabled: knowledgeEnabled,
             base_path: document.getElementById('knowledge-base-path')?.value.trim() || 'knowledge_base',
@@ -1048,6 +1093,9 @@ async function applySettings() {
                 };
             })(),
             knowledge: knowledgeConfig,
+            c2: {
+                enabled: c2Enabled
+            },
             robots: {
                 wecom: {
                     enabled: document.getElementById('robot-wecom-enabled')?.checked === true,
@@ -1174,6 +1222,15 @@ async function applySettings() {
             ? window.t('settings.apply.applySuccess')
             : '配置已成功应用！';
         alert(successMsg);
+        try {
+            const cfgResp = await apiFetch('/api/config');
+            if (cfgResp.ok) {
+                const fresh = await cfgResp.json();
+                syncC2NavFromConfig(fresh);
+            }
+        } catch (e) {
+            console.warn('refresh C2 nav after apply', e);
+        }
         try {
             if (typeof initChatAgentModeFromConfig === 'function') {
                 await initChatAgentModeFromConfig();
diff --git a/web/templates/index.html b/web/templates/index.html
index d40c6095..981ceded 100644
--- a/web/templates/index.html
+++ b/web/templates/index.html
@@ -1937,6 +1937,9 @@
                                 <div class="settings-nav-item" data-section="knowledge" onclick="switchSettingsSection('knowledge')">
                                     <span data-i18n="settings.nav.knowledge">知识库</span>
                                 </div>
+                                <div class="settings-nav-item" data-section="c2" onclick="switchSettingsSection('c2')">
+                                    <span data-i18n="settings.nav.c2">C2</span>
+                                </div>
                                 <div class="settings-nav-item" data-section="robots" onclick="switchSettingsSection('robots')">
                                     <span data-i18n="settings.nav.robots">机器人设置</span>
                                 </div>
@@ -2222,6 +2225,29 @@
                                 </div>
                             </div>
 
+                            <!-- C2 总开关 -->
+                            <div id="settings-section-c2" class="settings-section-content">
+                                <div class="settings-section-header">
+                                    <h3 data-i18n="settings.c2.title">C2 设置</h3>
+                                </div>
+                                <div class="settings-subsection">
+                                    <h4 data-i18n="settings.c2.sectionTitle">内置 C2</h4>
+                                    <div class="settings-form">
+                                        <div class="form-group">
+                                            <label class="checkbox-label">
+                                                <input type="checkbox" id="c2-enabled" class="modern-checkbox" />
+                                                <span class="checkbox-custom"></span>
+                                                <span class="checkbox-text" data-i18n="settings.c2.enableLabel">启用内置 C2（监听器、会话、Payload、MCP 工具等）</span>
+                                            </label>
+                                            <small class="form-hint" data-i18n="settings.c2.enableHint">关闭后不再启动监听器、不注册 C2 相关 MCP 工具，侧栏 C2 入口将隐藏；仅本机使用对话与知识库时可关闭以节省资源。</small>
+                                        </div>
+                                    </div>
+                                </div>
+                                <div class="settings-actions">
+                                    <button class="btn-primary" onclick="applySettings()" data-i18n="settings.apply.button">应用配置</button>
+                                </div>
+                            </div>
+
                             <!-- 机器人设置 -->
                             <div id="settings-section-robots" class="settings-section-content">
                                 <div class="settings-section-header">