diff --git a/README.md b/README.md
index 224edfa4..48bf4d65 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ CrossDesk 支持 Windows、macOS、Linux 之间的远程访问，也可从浏览
 | 实时画面与声音 | H.264 / AV1、30 / 60 fps 设置、硬件编解码选项、远端声音播放；实际能力取决于设备与构建配置 |
 | 多设备与多显示器 | 近期连接、设备别名、会话标签与远端显示器切换 |
 | 输入与协作 | 键鼠输入、远端光标同步、组合键、文本剪贴板同步、文件传输 |
-| 网络与部署 | P2P 直连、TURN 中继、SRTP 加密选项、自托管信令与中继服务 |
+| 网络与部署 | P2P 直连与默认增强打洞、TURN 中继、默认 SRTP、自托管信令与中继服务 |
 | Windows 锁屏控制 | 通过 CrossDesk Service 支持锁屏、登录界面及安全桌面的输入转发 |
 
 各客户端的入口和能力有所不同；桌面会话操作见下文，iOS 的具体功能见 [开发说明](apps/ios/README.md)。
@@ -93,7 +93,7 @@ sudo apt install "./crossdesk-linux-amd64-<version>.deb"
 
 ### 从浏览器连接
 
-1. 保持被控电脑上的 CrossDesk 运行，并确认已连接服务器；在被控端“设置”中保持 **启用 SRTP** 开启。
+1. 保持被控电脑上的 CrossDesk 运行，并确认已连接服务器；新版本默认请求 SRTP，无需在设置中开启。
 2. 打开 [Web 客户端](https://web.crossdesk.cn/)，输入 **远程设备 ID** 和 **密码**，点击“连接”。
 3. 连接后使用页面提供的显示器、鼠标模式和键盘控件操作远端；手机和平板也可通过浏览器访问。
 
@@ -125,16 +125,19 @@ sudo apt install "./crossdesk-linux-amd64-<version>.deb"
 点击主窗口右上角 **☰ → 设置**，修改后点击“确认”保存。建议在建立连接前调整；会话进行中部分选项不可修改。设置列表可向下滚动，查看自托管、启动方式与文件保存路径。
 
 <p align="center">
-  <img src="docs/images/desktop-settings-zh.png" width="720" alt="当前设置界面：画质、帧率、画面偏好、编解码、中继与 SRTP" />
+  <img src="docs/images/desktop-settings-zh.png" width="720" alt="设置界面参考：画质、帧率、画面偏好、编解码与中继；旧图中的 SRTP 开关已移除" />
 </p>
 
+SRTP 已默认开启，参考图中的旧 SRTP 开关不再提供。原生桌面默认使用 pool-wide 增强打洞；只有双方支持且认证、映射条件满足时才启动。无 DTLS 指纹旧端仍可兼容连接，但可能回退到未加密 RTP，此类连接不启用增强打洞。
+
+
 | 设置 | 说明 |
 | --- | --- |
 | 画面质量 / 帧率 | 选择低、中、高画质与 30 / 60 fps；实际帧率取决于网络和设备 |
 | 画面偏好 | 在帧率优先、画质优先、平衡之间选择 |
 | 视频编码格式 | H.264 / AV1；硬件编解码是否可用取决于平台、硬件与构建选项 |
 | 启用中继服务 | 允许借助 TURN 中继建立连接；P2P 连接失败时先检查此项 |
-| 启用 SRTP | 媒体传输加密选项，两端配置需兼容 |
+| SRTP | 默认请求媒体加密，无本地关闭开关；无指纹旧端保留兼容回退 |
 | 自托管配置 | 设置服务器地址、信令端口与中继端口，并勾选启用 |
 | 开机自启 / 启用守护进程 | 调整启动与进程守护行为，按界面提示重启后生效 |
 | 文件保存路径 | 选择接收文件的目录 |
diff --git a/README_EN.md b/README_EN.md
index 4c772f94..9759d36b 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -51,7 +51,7 @@ See the [screenshot notes](docs/images/README.md) for image sources and refresh
 | Live video and audio | H.264 / AV1, 30 / 60 fps settings, hardware codec options, and remote audio; availability depends on hardware and build configuration |
 | Devices and displays | Recent connections, device aliases, session tabs, and remote display switching |
 | Input and sharing | Keyboard/mouse input, remote cursor synchronization, shortcuts, text clipboard synchronization, and file transfer |
-| Networking and deployment | Direct P2P connections, TURN relay, an SRTP encryption option, and self-hosted signaling/relay services |
+| Networking and deployment | Direct P2P with hole punching enabled by default, TURN relay, SRTP by default, and self-hosted signaling/relay services |
 | Windows protected desktops | CrossDesk Service forwards input on lock screens, sign-in screens, and secure desktops |
 
 Controls and capabilities vary by client. Desktop controls are described below; see the [iOS guide](apps/ios/README.md) for native mobile features.
@@ -93,7 +93,7 @@ The eye button shows or hides the local password; the pencil button changes it.
 
 ### Connect from a browser
 
-1. Keep CrossDesk running and connected to the server on the host computer, with **Enable SRTP** enabled in its Settings.
+1. Keep CrossDesk running and connected to the server on the host computer; current versions request SRTP by default, with no Settings switch.
 2. Open the [Web Client](https://web.crossdesk.cn/), enter the **Remote Device ID** and **Password**, and click **Connect**.
 3. Use the page's display, mouse-mode, and keyboard controls during the session. Phone and tablet browsers can also connect.
 
@@ -125,16 +125,19 @@ Desktop clients synchronize text clipboard contents. Configure the receiving dir
 Open **☰ → Settings** in the top-right corner and click **OK** to save. Configure the session before connecting; some settings are disabled during an active session. Scroll down for self-hosting, startup behavior, and the file save path.
 
 <p align="center">
-  <img src="docs/images/desktop-settings-en.png" width="720" alt="Current settings for quality, frame rate, video preference, codecs, relay, and SRTP" />
+  <img src="docs/images/desktop-settings-en.png" width="720" alt="Settings reference for quality, frame rate, video preference, codecs, and relay; the old SRTP switch has been removed" />
 </p>
 
+SRTP is enabled by default; the SRTP switch in this reference image is no longer available. Native desktop builds use pool-wide punching when both peers support it and authentication and mapping conditions are met. Legacy peers without DTLS fingerprints remain compatible through a possible unencrypted RTP fallback, which cannot use enhanced punching.
+
+
 | Setting | Purpose |
 | --- | --- |
 | Video Quality / Video Capture Frame Rate | Low, medium, or high quality and 30 / 60 fps; actual performance depends on the connection and device |
 | Video Preference | Choose frame-rate priority, quality priority, or balanced adaptation |
 | Video Encode Format | H.264 / AV1; hardware codec availability depends on the platform, device, and build options |
 | Enable TURN Service | Allow relay-assisted connections; check this setting if P2P fails |
-| SRTP | Media encryption option; configurations on both ends must be compatible |
+| SRTP | Requests media encryption by default, with no local off switch; retains fallback for legacy peers without fingerprints |
 | Self-Hosted Config | Set the host, signaling port, and TURN port, then enable the checkbox |
 | Auto Start / Enable Daemon | Configure startup and process supervision; restart as indicated by the UI |
 | File Save Path | Choose where received files are saved |
diff --git a/apps/desktop/src/config_center/config_center.cpp b/apps/desktop/src/config_center/config_center.cpp
index 5df11de5..86225b93 100644
--- a/apps/desktop/src/config_center/config_center.cpp
+++ b/apps/desktop/src/config_center/config_center.cpp
@@ -103,7 +103,12 @@ int ConfigCenter::Load() {
     ini_.SetLongValue(section_, "turn_mode", static_cast<long>(turn_mode_));
     persist_config_migration = true;
   }
-  enable_srtp_ = ini_.GetBoolValue(section_, "enable_srtp", enable_srtp_);
+  // Migrate the former user switch. Keep true in the file for older builds,
+  // while the current application always requests encrypted native media.
+  if (!ini_.GetBoolValue(section_, "enable_srtp", false)) {
+    ini_.SetBoolValue(section_, "enable_srtp", true);
+    persist_config_migration = true;
+  }
   enable_self_hosted_ =
       ini_.GetBoolValue(section_, "enable_self_hosted", enable_self_hosted_);
 
@@ -165,7 +170,7 @@ int ConfigCenter::Save() {
   ini_.SetLongValue(section_, "turn_mode", static_cast<long>(turn_mode_));
   ini_.SetBoolValue(section_, "enable_turn",
                     turn_mode_ != TURN_MODE::DISABLED);
-  ini_.SetBoolValue(section_, "enable_srtp", enable_srtp_);
+  ini_.SetBoolValue(section_, "enable_srtp", true);
   ini_.SetBoolValue(section_, "enable_self_hosted", enable_self_hosted_);
 
   // only save when self hosted
@@ -301,16 +306,6 @@ int ConfigCenter::SetTurn(bool enable_turn) {
   return SetTurnMode(turn_mode_);
 }
 
-int ConfigCenter::SetSrtp(bool enable_srtp) {
-  enable_srtp_ = enable_srtp;
-  ini_.SetBoolValue(section_, "enable_srtp", enable_srtp_);
-  SI_Error rc = ini_.SaveFile(config_path_.c_str());
-  if (rc < 0) {
-    return -1;
-  }
-  return 0;
-}
-
 int ConfigCenter::SetServerHost(const std::string& signal_server_host) {
   signal_server_host_ = signal_server_host;
   ini_.SetValue(section_, "signal_server_host", signal_server_host_.c_str());
@@ -472,7 +467,7 @@ bool ConfigCenter::IsEnableTurn() const {
   return turn_mode_ != TURN_MODE::DISABLED;
 }
 
-bool ConfigCenter::IsEnableSrtp() const { return enable_srtp_; }
+bool ConfigCenter::IsEnableSrtp() const { return true; }
 
 std::string ConfigCenter::GetSignalServerHost() const {
   return signal_server_host_;
diff --git a/apps/desktop/src/config_center/config_center.h b/apps/desktop/src/config_center/config_center.h
index 7e6fe61e..9047eb00 100644
--- a/apps/desktop/src/config_center/config_center.h
+++ b/apps/desktop/src/config_center/config_center.h
@@ -47,7 +47,6 @@ class ConfigCenter {
   int SetHardwareVideoCodec(bool hardware_video_codec);
   int SetTurnMode(TURN_MODE turn_mode);
   int SetTurn(bool enable_turn);
-  int SetSrtp(bool enable_srtp);
   int SetServerHost(const std::string& signal_server_host);
   int SetServerPort(int signal_server_port);
   int SetSelfHosted(bool enable_self_hosted);
@@ -99,7 +98,6 @@ class ConfigCenter {
   VIDEO_ENCODE_FORMAT video_encode_format_ = VIDEO_ENCODE_FORMAT::H264;
   bool hardware_video_codec_ = false;
   TURN_MODE turn_mode_ = TURN_MODE::AUTO_UDP_TCP;
-  bool enable_srtp_ = false;
   std::string signal_server_host_ = "";
   std::string signal_server_host_default_ = "api.crossdesk.cn";
   int signal_server_port_ = 0;
diff --git a/apps/desktop/src/gui/application/gui_application.cpp b/apps/desktop/src/gui/application/gui_application.cpp
index 5b518230..6dc25667 100644
--- a/apps/desktop/src/gui/application/gui_application.cpp
+++ b/apps/desktop/src/gui/application/gui_application.cpp
@@ -1230,7 +1230,6 @@ void GuiApplication::ResetSettingsUi() {
   ui_->main->set_hardware_codec_enabled(hardware_codec_available &&
                                        enable_hardware_video_codec_);
   ui_->main->set_turn_enabled(enable_turn_);
-  ui_->main->set_srtp_enabled(enable_srtp_);
   ui_->main->set_self_hosted_enabled(enable_self_hosted_);
   ui_->main->set_autostart_enabled(enable_autostart_);
   ui_->main->set_daemon_enabled(enable_daemon_);
@@ -2419,7 +2418,6 @@ void GuiApplication::SyncStreamWindow() {
     return;
   }
   (*ui_->stream)->set_window_maximized((*ui_->stream)->window().is_maximized());
-  (*ui_->stream)->set_srtp_enabled(enable_srtp_);
 #if defined(__APPLE__)
   if (ui_->stream_live_resize_configuration_attempts > 0) {
     if (ConfigureStreamWindowLiveResize(
@@ -2987,7 +2985,6 @@ void GuiApplication::SaveSettingsFromUi() {
   enable_hardware_video_codec_ = ConfigCenter::IsHardwareVideoCodecAvailable() &&
                                   main->get_hardware_codec_enabled();
   enable_turn_ = main->get_turn_enabled();
-  enable_srtp_ = main->get_srtp_enabled();
   enable_self_hosted_ = main->get_self_hosted_enabled();
   enable_autostart_ = main->get_autostart_enabled();
   enable_daemon_ = main->get_daemon_enabled();
@@ -3010,7 +3007,6 @@ void GuiApplication::SaveSettingsFromUi() {
           video_encode_format_button_value_));
   config_center_->SetHardwareVideoCodec(enable_hardware_video_codec_);
   config_center_->SetTurn(enable_turn_);
-  config_center_->SetSrtp(enable_srtp_);
   config_center_->SetSelfHosted(enable_self_hosted_);
   config_center_->SetAutostart(enable_autostart_);
   config_center_->SetDaemon(enable_daemon_);
@@ -3056,7 +3052,6 @@ void GuiApplication::SaveSettingsFromUi() {
   video_encode_format_button_value_last_ = video_encode_format_button_value_;
   enable_hardware_video_codec_last_ = enable_hardware_video_codec_;
   enable_turn_last_ = enable_turn_;
-  enable_srtp_last_ = enable_srtp_;
   enable_self_hosted_last_ = enable_self_hosted_;
   enable_autostart_last_ = enable_autostart_;
   enable_daemon_last_ = enable_daemon_;
diff --git a/apps/desktop/src/gui/assets/layouts/layout.h b/apps/desktop/src/gui/assets/layouts/layout.h
index d5b83742..27748a76 100644
--- a/apps/desktop/src/gui/assets/layouts/layout.h
+++ b/apps/desktop/src/gui/assets/layouts/layout.h
@@ -53,8 +53,6 @@
 #define ENABLE_HARDWARE_VIDEO_CODEC_CHECKBOX_PADDING_EN 218 * dpi_scale_
 #define ENABLE_TURN_CHECKBOX_PADDING_CN 171 * dpi_scale_
 #define ENABLE_TURN_CHECKBOX_PADDING_EN 218 * dpi_scale_
-#define ENABLE_SRTP_CHECKBOX_PADDING_CN 171 * dpi_scale_
-#define ENABLE_SRTP_CHECKBOX_PADDING_EN 218 * dpi_scale_
 #define ENABLE_SELF_HOSTED_SERVER_CHECKBOX_PADDING_CN 171 * dpi_scale_
 #define ENABLE_SELF_HOSTED_SERVER_CHECKBOX_PADDING_EN 218 * dpi_scale_
 #define ENABLE_AUTOSTART_PADDING_CN 171 * dpi_scale_
diff --git a/apps/desktop/src/gui/assets/layouts/layout_relative.h b/apps/desktop/src/gui/assets/layouts/layout_relative.h
index e58a0e44..687627dd 100644
--- a/apps/desktop/src/gui/assets/layouts/layout_relative.h
+++ b/apps/desktop/src/gui/assets/layouts/layout_relative.h
@@ -57,8 +57,6 @@
 #define ENABLE_HARDWARE_VIDEO_CODEC_CHECKBOX_PADDING_EN 218
 #define ENABLE_TURN_CHECKBOX_PADDING_CN 171
 #define ENABLE_TURN_CHECKBOX_PADDING_EN 218
-#define ENABLE_SRTP_CHECKBOX_PADDING_CN 171
-#define ENABLE_SRTP_CHECKBOX_PADDING_EN 218
 #define ENABLE_SELF_HOSTED_SERVER_CHECKBOX_PADDING_CN 171
 #define ENABLE_SELF_HOSTED_SERVER_CHECKBOX_PADDING_EN 218
 #define ENABLE_AUTOSTART_PADDING_CN 171
diff --git a/apps/desktop/src/gui/assets/localization/localization_data.h b/apps/desktop/src/gui/assets/localization/localization_data.h
index 82e9dc2d..a269ca59 100644
--- a/apps/desktop/src/gui/assets/localization/localization_data.h
+++ b/apps/desktop/src/gui/assets/localization/localization_data.h
@@ -149,7 +149,6 @@ struct TranslationRow {
     "Enable Hardware Video Codec:", u8"Использовать аппаратный кодек:")        \
   X(enable_turn, u8"启用中继服务:",                                            \
     "Enable TURN Service:", u8"Включить TURN-сервис:")                         \
-  X(enable_srtp, u8"启用SRTP:", "Enable SRTP:", u8"Включить SRTP:")            \
   X(self_hosted_server_config, u8"自托管配置", "Self-Hosted Config",           \
     u8"Конфигурация self-hosted")                                              \
   X(self_hosted_server_settings, u8"自托管设置", "Self-Hosted Settings",       \
diff --git a/apps/desktop/src/gui/features/settings/settings_manager.cpp b/apps/desktop/src/gui/features/settings/settings_manager.cpp
index 89abcdea..87585851 100644
--- a/apps/desktop/src/gui/features/settings/settings_manager.cpp
+++ b/apps/desktop/src/gui/features/settings/settings_manager.cpp
@@ -308,7 +308,6 @@ int SettingsManager::Load() {
   owner_.enable_hardware_video_codec_ =
       owner_.config_center_->IsHardwareVideoCodec();
   owner_.enable_turn_ = owner_.config_center_->IsEnableTurn();
-  owner_.enable_srtp_ = owner_.config_center_->IsEnableSrtp();
   owner_.enable_self_hosted_ = owner_.config_center_->IsSelfHosted();
   owner_.enable_autostart_ = owner_.config_center_->IsEnableAutostart();
   owner_.enable_daemon_ = owner_.config_center_->IsEnableDaemon();
@@ -335,7 +334,6 @@ int SettingsManager::Load() {
   owner_.enable_hardware_video_codec_last_ =
       owner_.enable_hardware_video_codec_;
   owner_.enable_turn_last_ = owner_.enable_turn_;
-  owner_.enable_srtp_last_ = owner_.enable_srtp_;
   owner_.enable_self_hosted_last_ = owner_.enable_self_hosted_;
   owner_.enable_autostart_last_ = owner_.enable_autostart_;
 
diff --git a/apps/desktop/src/gui/runtime/runtime_state.h b/apps/desktop/src/gui/runtime/runtime_state.h
index 464df2b1..e50a85cb 100644
--- a/apps/desktop/src/gui/runtime/runtime_state.h
+++ b/apps/desktop/src/gui/runtime/runtime_state.h
@@ -136,7 +136,6 @@ struct UserSettingsState {
   int video_encode_format_button_value_ = 0;
   bool enable_hardware_video_codec_ = true;
   bool enable_turn_ = true;
-  bool enable_srtp_ = false;
   char signal_server_ip_[256] = "api.crossdesk.cn";
   char signal_server_port_[6] = "9099";
   bool enable_self_hosted_ = false;
@@ -147,7 +146,6 @@ struct UserSettingsState {
   int video_encode_format_button_value_last_ = 0;
   bool enable_hardware_video_codec_last_ = false;
   bool enable_turn_last_ = true;
-  bool enable_srtp_last_ = false;
   bool enable_self_hosted_last_ = false;
   bool enable_autostart_ = false;
   bool enable_autostart_last_ = false;
diff --git a/apps/desktop/src/gui/ui/main_window.slint b/apps/desktop/src/gui/ui/main_window.slint
index 7d9255f1..aeb2fafa 100644
--- a/apps/desktop/src/gui/ui/main_window.slint
+++ b/apps/desktop/src/gui/ui/main_window.slint
@@ -48,7 +48,6 @@ export global UiStrings {
     in-out property <string> codec: "Video codec";
     in-out property <string> hardware-codec: "Hardware video codec";
     in-out property <string> turn-relay: "TURN relay";
-    in-out property <string> srtp: "SRTP encryption";
     in-out property <string> self-hosted: "Self-hosted server";
     in-out property <string> autostart: "Start with system";
     in-out property <string> daemon: "Run in background";
@@ -247,7 +246,6 @@ export component MainWindow inherits Window {
     in-out property <int> codec-index: 0;
     in-out property <bool> hardware-codec-enabled: true;
     in-out property <bool> turn-enabled: true;
-    in-out property <bool> srtp-enabled: false;
     in-out property <bool> self-hosted-enabled: false;
     in-out property <bool> autostart-enabled: false;
     in-out property <bool> daemon-enabled: false;
@@ -1488,11 +1486,6 @@ export component MainWindow inherits Window {
                         Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.turn-relay; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
                         ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.turn-enabled; enabled: !root.settings-session-active; }
                     }
-                    Rectangle {
-                        height: 30px;
-                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.srtp; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.srtp-enabled; enabled: !root.settings-session-active; }
-                    }
                     Rectangle {
                         height: 30px;
                         Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.privacy-on-connect; color: root.privacy-setting-available ? #202124 : #8b8f95; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
diff --git a/apps/desktop/src/gui/ui/stream_window.slint b/apps/desktop/src/gui/ui/stream_window.slint
index 1e419c68..7fd408fc 100644
--- a/apps/desktop/src/gui/ui/stream_window.slint
+++ b/apps/desktop/src/gui/ui/stream_window.slint
@@ -160,7 +160,6 @@ export component StreamWindow inherits Window {
     in property <bool> remote-cursor-active: false;
     in property <int> remote-cursor-shape: 0;
     in property <bool> audio-enabled: true;
-    in property <bool> srtp-enabled: false;
     in property <bool> fullscreen-enabled: false;
     in property <bool> stats-visible: false;
     in property <[NetworkStatsRow]> stats-rows;
@@ -506,20 +505,8 @@ export component StreamWindow inherits Window {
                         width: parent.width - 27px;
                         height: parent.height;
                         background: transparent;
-                        if root.srtp-enabled: Text {
-                            x: 0px;
-                            width: 12px;
-                            height: parent.height;
-                            text: FontAwesomeIcons.shield-halved;
-                            color: #30343b;
-                            font-family: "Font Awesome 6 Free";
-                            font-weight: 900;
-                            font-size: ImGuiFontStyle.base;
-                            horizontal-alignment: center;
-                            vertical-alignment: center;
-                        }
                         Text {
-                            x: root.srtp-enabled ? 16px : 0px;
+                            x: 0px;
                             width: parent.width - self.x;
                             height: parent.height;
                             text: tab.title;
diff --git a/apps/desktop/src/gui/ui/ui_localization.h b/apps/desktop/src/gui/ui/ui_localization.h
index c848def4..1ee4a127 100644
--- a/apps/desktop/src/gui/ui/ui_localization.h
+++ b/apps/desktop/src/gui/ui/ui_localization.h
@@ -69,7 +69,6 @@ inline int ApplyMainWindowStrings(
   strings.set_hardware_codec(
       Text(localization::enable_hardware_video_codec[language]));
   strings.set_turn_relay(Text(localization::enable_turn[language]));
-  strings.set_srtp(Text(localization::enable_srtp[language]));
   strings.set_self_hosted(
       Text(localization::self_hosted_server_config[language]));
   strings.set_autostart(Text(localization::enable_autostart[language]));
diff --git a/apps/desktop/src/gui/views/windows/main_settings_window.cpp b/apps/desktop/src/gui/views/windows/main_settings_window.cpp
index c304493c..d2f85dde 100644
--- a/apps/desktop/src/gui/views/windows/main_settings_window.cpp
+++ b/apps/desktop/src/gui/views/windows/main_settings_window.cpp
@@ -268,25 +268,6 @@ int GuiApplication::SettingWindow() {
 
       ImGui::Separator();
 
-      {
-        settings_items_offset += settings_items_padding;
-        ImGui::SetCursorPosY(settings_items_offset);
-        ImGui::AlignTextToFramePadding();
-        ImGui::Text(
-            "%s",
-            localization::enable_srtp[localization_language_index_].c_str());
-        ImGui::SameLine();
-        if (ConfigCenter::LANGUAGE::CHINESE == localization_language_) {
-          ImGui::SetCursorPosX(title_bar_button_width_ * 4.275f);
-        } else {
-          ImGui::SetCursorPosX(title_bar_button_width_ * 5.955f);
-        }
-
-        ImGui::Checkbox("##enable_srtp", &enable_srtp_);
-      }
-
-      ImGui::Separator();
-
       {
         settings_items_offset += settings_items_padding;
         ImGui::SetCursorPosY(settings_items_offset + 1);
@@ -569,14 +550,6 @@ int GuiApplication::SettingWindow() {
         }
         enable_turn_last_ = enable_turn_;
 
-        // SRTP
-        if (enable_srtp_) {
-          config_center_->SetSrtp(true);
-        } else {
-          config_center_->SetSrtp(false);
-        }
-        enable_srtp_last_ = enable_srtp_;
-
         if (enable_self_hosted_) {
           config_center_->SetSelfHosted(true);
         } else {
diff --git a/apps/desktop/src/gui/views/windows/stream_window.cpp b/apps/desktop/src/gui/views/windows/stream_window.cpp
index fa6450b0..7b54eb47 100644
--- a/apps/desktop/src/gui/views/windows/stream_window.cpp
+++ b/apps/desktop/src/gui/views/windows/stream_window.cpp
@@ -136,10 +136,7 @@ int GuiApplication::StreamWindow() {
           continue;
         }
 
-        std::string tab_label =
-            enable_srtp_
-                ? std::string(ICON_FA_SHIELD_HALVED) + " " + props->remote_id_
-                : props->remote_id_;
+        const std::string& tab_label = props->remote_id_;
         if (ImGui::BeginTabItem(tab_label.c_str(), &props->tab_opened_)) {
           props->tab_selected_ = true;
           ImGui::SetWindowFontScale(0.6f);
@@ -308,4 +305,4 @@ int GuiApplication::StreamWindow() {
 
   return 0;
 }
-} // namespace crossdesk
\ No newline at end of file
+} // namespace crossdesk
diff --git a/apps/desktop/tests/config_center_srtp_test.cpp b/apps/desktop/tests/config_center_srtp_test.cpp
new file mode 100644
index 00000000..ed45ca00
--- /dev/null
+++ b/apps/desktop/tests/config_center_srtp_test.cpp
@@ -0,0 +1,50 @@
+#include "config_center.h"
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <stdexcept>
+
+using crossdesk::ConfigCenter;
+
+static void Check(bool result, const char* message) {
+  if (!result) throw std::runtime_error(message);
+}
+
+int main(int argc, char** argv) {
+  try {
+    Check(argc == 2, "provide a new isolated output directory");
+    const std::filesystem::path root(argv[1]);
+    Check(std::filesystem::create_directory(root), "output directory must be new");
+    unsigned cases = 0;
+    for (const auto* setting : {"new", "missing", "false", "true", "invalid"}) {
+      const auto path = root / (std::string(setting) + ".ini");
+      if (std::string(setting) != "new") {
+        std::ofstream file(path);
+        file << "[Settings]\nlanguage=2\nturn_mode=2\nfile_transfer_save_path=/saved-path\n";
+        if (std::string(setting) != "missing") file << "enable_srtp=" << setting << '\n';
+      }
+      ConfigCenter config(path.string());
+      Check(config.IsEnableSrtp(), "fresh and legacy settings must request SRTP");
+      if (std::string(setting) != "new") {
+        Check(config.GetLanguage() == ConfigCenter::LANGUAGE::RUSSIAN &&
+                  config.GetTurnMode() == ConfigCenter::TURN_MODE::FORCE_UDP &&
+                  config.GetFileTransferSavePath() == "/saved-path",
+              "SRTP migration preserves unrelated preferences");
+      }
+      CSimpleIniA saved;
+      Check(saved.LoadFile(path.string().c_str()) >= 0 &&
+                saved.GetBoolValue("Settings", "enable_srtp", false),
+            "SRTP migration persists before any later settings save");
+      Check(config.Save() == 0 && config.Load() == 0 && config.IsEnableSrtp(),
+            "settings save/reload cannot disable SRTP");
+      ConfigCenter reopened(path.string());
+      Check(reopened.IsEnableSrtp(), "SRTP survives restart");
+      ++cases;
+    }
+    std::cout << "PASS SRTP configuration migration cases=" << cases << '\n';
+  } catch (const std::exception& error) {
+    std::cerr << "FAIL: " << error.what() << '\n';
+    return 1;
+  }
+}
diff --git a/apps/desktop/xmake/targets.lua b/apps/desktop/xmake/targets.lua
index 0c5d1f91..4b5fbd0d 100644
--- a/apps/desktop/xmake/targets.lua
+++ b/apps/desktop/xmake/targets.lua
@@ -339,6 +339,12 @@ function setup_targets()
         add_includedirs("apps/desktop/src", "apps/desktop/src/config_center",
             {public = true})
 
+    target("config_center_srtp_test")
+        set_kind("binary")
+        set_default(false)
+        add_deps("config_center")
+        add_files("apps/desktop/tests/config_center_srtp_test.cpp")
+
     target("assets")
         set_kind("headeronly")
         add_includedirs("apps/desktop/src/gui/assets/localization",
diff --git a/deps/submodules/minirtc b/deps/submodules/minirtc
index 5e1b4381..ce3c41c0 160000
--- a/deps/submodules/minirtc
+++ b/deps/submodules/minirtc
@@ -1 +1 @@
-Subproject commit 5e1b4381fbd243893289ec434a8fe4030be2f79e
+Subproject commit ce3c41c05c62a622ddf4ebb30866d7c487d1392e
diff --git a/docs/p2p-punching-implementation-plan.md b/docs/p2p-punching-implementation-plan.md
index cee83d53..62530e45 100644
--- a/docs/p2p-punching-implementation-plan.md
+++ b/docs/p2p-punching-implementation-plan.md
@@ -1,6 +1,6 @@
 # CrossDesk 双端 UDP 打洞增强实现方案
 
-状态：P0 门槛已通过；P1–P4 默认关闭原型、受控运行与跨平台构建已实现；真实异网 C 组已有两次增强直连通过双端日志及抓包核验，正式 P5 对照仍待执行。按用户要求，画面、声音、控制和切换质量不纳入本次验收。日期：2026-09-14。第 15 节保留 P0 历史记录，最新进展与边界见第 16 节。
+状态：P0 门槛已通过，P1–P4 原型、受控运行与跨平台构建已实现。按用户最新要求，原生桌面默认且仅提供 pool-wide，CrossDesk 本机 SRTP 固定开启；无指纹旧端保留原有兼容回退。真实异网已有增强直连证据，默认调整不代表正式收益验收通过。按用户要求，画面、声音、控制和切换质量不纳入本次验收。日期：2026-09-14。第 15 节保留 P0 历史记录，最新进展与边界见第 16 节。
 
 源码基线：CrossDesk `73e3bf709d7c054df7bd75cfafceda0721c6cda1`；MiniRTC 子模块 `f169a696cb4e6cb59037ec02e85532e30d3c1262`；libnice `0.1.24` 加仓库已有补丁。
 
@@ -54,7 +54,7 @@ Mac 先前发往 :11968 的短包没有出现在 Windows 捕获中；成功开
 3. **新 socket 由 libnice 管理。** 不在 GUI、业务数据通道或独立线程中建立脱离 ICE 生命周期的临时 socket 池。
 4. **探索和 ICE 检查分开调度。** 数百个目的端口属于有限的探索集合；只有少量命中端点进入普通检查表。
 5. **保留普通 ICE 与已有 30 秒升级窗口。** 增强操作不能重置该窗口、重启 DTLS，或延迟正常的中继可用状态。
-6. **默认关闭。** 编译扩展存在、运行配置开启、双方声明支持、网络和连接状态满足条件时才启动。
+6. **默认 pool-wide。** 原生桌面包含扩展、无公开模式选择；双方声明支持、加密认证、网络和连接状态满足条件时才启动。未满足条件仍使用原 ICE/中继。iOS/WebRTC 不启用。
 
 这会使第一版主要改善“已通过中继连接，但希望随后升为 P2P”的场景。将来需要在没有中继时运行同类算法，应另行设计可验证的信令协调通道。
 
@@ -232,7 +232,7 @@ HELLO 的重发额度耗尽只停止主动发送，在原升级截止内继续
 
 控制包与新增 PROBE/ACK 单独计数；提升后的普通 STUN 检查遵循 libnice 原节拍，但需要记录它们带来的额外事务和重传。媒体包不计入探测预算。
 
-首次实现用内部配置和明确命名的实验环境变量加载配置，仅读取一次，不增加公开 `Params` 布局或 GUI 开关；例如 `MINIRTC_UDP_PUNCH=off|wide-only|pool-wide`。无效值禁用增强并打印原因。端口池大小等调参入口统一由同一校验函数处理。
+当前原生桌面配置仅读取一次，固定使用 pool-wide，不增加公开 `Params` 布局或 GUI 模式开关。原 `MINIRTC_UDP_PUNCH` 模式变量不再读取，公开编译开关已移除。端口池大小等诊断调参入口仍由同一校验函数处理；无效预算禁用增强并打印原因，不绕过资源上限。
 
 `wide-only` 保留同样的协议、角色和锚点选择，但 pool 侧只用一个端点；`pool-wide` 使用配置的端点池。基线 `off` 仍保留已有附近端口预测。不能让实验分组顺带改变其他 ICE、TURN 或重试配置。
 
@@ -423,7 +423,7 @@ P0 工具只能使用实验提供的明确对端地址，不含广范围探测
 不再将这些项目列为阻塞项，也不将免验记为测试通过。仍需证明同一命中 socket
 完成标准 ICE 提名并持续承载应用数据，保留 DTLS、兼容性及资源生命周期检查。
 
-在真实网络证明净收益且兼容/退出检查通过之前，保持默认关闭；通过后再单独形成默认启用及参数调整变更。
+原计划将收益验收作为默认启用门槛；用户现明确要求默认且仅用 pool-wide，因此调整默认策略。网络适用范围、认证、原截止和资源预算不变；历史 A/B 记录保留，新程序不再提供 A/B 模式，详见 16.5。
 
 ## 11. 测试设计
 
@@ -487,7 +487,7 @@ P0 工具只能使用实验提供的明确对端地址，不含广范围探测
 
 如果 P0 证明某个后端接口或 selected-pair 路径不可按本文实现，应先根据实际 libnice 代码修订这一处设计并给出替代路径，再继续后续阶段；不要把未完成的直接验证改成强制选路或延长超时。
 
-本方案当前的执行目标是一个默认关闭、可复现实验、完整管理 socket 生命周期的原型。通过 P5 后，才讨论默认启用、扩大网络适用范围，以及首次连接阶段的增强。
+本方案原始执行目标是默认关闭的实验原型；当前默认策略按用户要求改为 pool-wide，见 16.5。扩大网络适用范围及首次连接阶段增强不属于这次默认调整。
 
 ## 14. 技术依据
 
@@ -777,3 +777,25 @@ socket。命中、ACK、发送失败、同进程会话争用、原窗口剩余
 TURN → 标准 ICE → 同一命中 socket 上持续 SRTP。默认开关、128/1024/128 PPS
 实验参数、30 秒升级截止及 DTLS 生命周期不变。结果和 Windows 操作见
 [修复验证记录](../deps/submodules/minirtc/tests/ice/lab/punch-runtime-validation-2026-09-14.md#hello-启动错位与映射地址碰撞修复2026-09-14)。
+
+
+### 16.5 默认 pool-wide 与本机 SRTP 固定开启（2026-09-14）
+
+按用户要求，原生桌面不再提供 off/wide-only/pool-wide 三选一入口，也移除公开
+构建开关。读取进程配置时直接选择 pool-wide；遗留模式环境变量不再生效，诊断
+TRACE 与有界预算调参仍保留。内部 Off 是不支持平台/无效参数状态，WideOnly
+仅保留 v1 协议及 P0/单端点夹具用途，不是产品选项。
+
+CrossDesk 移除 Slint 和旧 ImGui 设置中的 SRTP 控件、对应 setter 与可变 UI 状态。
+INI 中旧 false/缺失/无效 SRTP 值迁移为 true，其他配置保留；新建连接始终请求
+SRTP。用户对旧版兼容提出疑问，因此保留无 DTLS 指纹旧端的原明文回退：这是
+默认请求加密，不是拒绝所有明文旧端。该回退不能启动增强打洞。原来只根据本地
+设置显示的加密盾牌被移除，避免在旧端回退时误报已加密。
+
+没有改变候选/认证门槛、128 个端点、1024 个目标、128 PPS、30 秒总窗口，
+没有强制选路或重启 DTLS。旧端没有增强能力时继续普通 ICE/中继；iOS 和 WebRTC
+不启用此增强。默认启用是用户选择，不能从中推导所有 NAT 都能直连。
+
+实验工具新计划只生成 C/pool-wide，拒绝启动旧 A/B 条目；历史结果仍可读取汇总。
+同机自动入口、旧端能力与无指纹兼容、SRTP 配置迁移及真实 TURN/DTLS/SRTP
+验证详见 [本次记录](../deps/submodules/minirtc/tests/ice/lab/punch-runtime-validation-2026-09-14.md#默认-pool-wide-与本机-srtp-固定开启2026-09-14)。
diff --git a/docs/p2p-uu-comparison-test-plan.md b/docs/p2p-uu-comparison-test-plan.md
index 8d21a020..eff4694f 100644
--- a/docs/p2p-uu-comparison-test-plan.md
+++ b/docs/p2p-uu-comparison-test-plan.md
@@ -19,7 +19,7 @@
 - 每批只测试一种软件，另一种软件退出；暂停其他远控、下载。Windows 需由本地
   人员操作，不能依赖即将退出的 UU 会话完成进程重启。这是原始隔离条件；若依赖
   UU 管理通道操作对端，按第 9 节执行，不要求终止该通道，不声称满足完全隔离。
-- CrossDesk 双端打开 SRTP，运行 `pool-wide`、`TRACE=1`；每批固定实验参数。
+- CrossDesk 双端默认请求 SRTP，运行默认 `pool-wide` 并设置 `TRACE=1`；每批固定实验参数。
   原 U01/X01 批次为 64 个端点、512 个随机顺序目标、100 PPS；后续按第 10 节
   使用 128 个端点、1024 个离散递增目标、128 PPS，两批均为 10 秒探索与 3 秒
   检查收尾。记录实际协商参数，禁止把不同版本与预算混成同一批结果。
@@ -155,12 +155,11 @@ CrossDesk 两端启动命令（X01/X02）：
 
 ```sh
 cd /Users/dijunkun/crossdesk
-MINIRTC_UDP_PUNCH=pool-wide MINIRTC_UDP_PUNCH_TRACE=1 xmake r crossdesk
+MINIRTC_UDP_PUNCH_TRACE=1 xmake r crossdesk
 ```
 
 ```powershell
 Set-Location E:\SourceCode\crossdesk
-$env:MINIRTC_UDP_PUNCH = 'pool-wide'
 $env:MINIRTC_UDP_PUNCH_TRACE = '1'
 .\build\windows\x64\debug\crossdesk.exe
 ```