diff --git a/db/ConfigBuilder.cpp b/db/ConfigBuilder.cpp
index b3bd948..f284aad 100644
--- a/db/ConfigBuilder.cpp
+++ b/db/ConfigBuilder.cpp
@@ -449,8 +449,28 @@ namespace NekoRay {
             }
 
             // chain rules: this
-            auto mapping_port = MkPort();
+            auto ext_mapping_port = 0;
+            auto ext_socks_port = 0;
             auto thisExternalStat = ent->bean->NeedExternal(isFirstProfile, dataStore->running_spmode == SystemProxyMode::VPN);
+            // determine port
+            if (thisExternalStat > 0) {
+                if (ent->type == "custom") {
+                    auto bean = ent->CustomBean();
+                    if (InRange(bean->mapping_port, 0, 65535)) {
+                        ext_mapping_port = bean->mapping_port;
+                    } else {
+                        ext_mapping_port = MkPort();
+                    }
+                    if (InRange(bean->socks_port, 0, 65535)) {
+                        ext_socks_port = bean->socks_port;
+                    } else {
+                        ext_socks_port = MkPort();
+                    }
+                } else {
+                    ext_mapping_port = MkPort();
+                    ext_socks_port = MkPort();
+                }
+            }
             if (thisExternalStat == 2) dataStore->need_keep_vpn_off = true;
             if (thisExternalStat == 1) {
                 // mapping
@@ -459,7 +479,7 @@ namespace NekoRay {
                         {"type", "direct"},
                         {"tag", tagOut + "-mapping"},
                         {"listen", "127.0.0.1"},
-                        {"listen_port", mapping_port},
+                        {"listen_port", ext_mapping_port},
                         {"override_address", ent->bean->serverAddress},
                         {"override_port", ent->bean->serverPort},
                     };
@@ -468,7 +488,7 @@ namespace NekoRay {
                         {"protocol", "dokodemo-door"},
                         {"tag", tagOut + "-mapping"},
                         {"listen", "127.0.0.1"},
-                        {"port", mapping_port},
+                        {"port", ext_mapping_port},
                         {"settings", QJsonObject{
                                          // to
                                          {"address", ent->bean->serverAddress},
@@ -497,12 +517,9 @@ namespace NekoRay {
             // Outbound
 
             QJsonObject outbound;
-            fmt::CoreObjOutboundBuildResult coreR;
-            fmt::ExternalBuildResult extR;
 
             if (thisExternalStat > 0) {
-                auto ext_socks_port = MkPort();
-                extR = ent->bean->BuildExternal(mapping_port, ext_socks_port, thisExternalStat);
+                const auto extR = ent->bean->BuildExternal(ext_mapping_port, ext_socks_port, thisExternalStat);
                 if (extR.program.isEmpty()) {
                     status->result->error = QObject::tr("Core not found: %1").arg(ent->bean->DisplayType());
                     return {};
@@ -530,14 +547,14 @@ namespace NekoRay {
                 }
 
                 // EXTERNAL PROCESS
-                auto extC = new sys::ExternalProcess();
+                QSharedPointer<sys::ExternalProcess> extC(new sys::ExternalProcess());
                 extC->tag = ent->bean->DisplayType();
                 extC->program = extR.program;
                 extC->arguments = extR.arguments;
                 extC->env = extR.env;
-                status->result->ext += extC;
+                status->result->exts.emplace_back(extR, extC);
             } else {
-                coreR = IS_NEKO_BOX ? ent->bean->BuildCoreObjSingBox() : ent->bean->BuildCoreObjV2Ray();
+                const auto coreR = IS_NEKO_BOX ? ent->bean->BuildCoreObjSingBox() : ent->bean->BuildCoreObjV2Ray();
                 if (coreR.outbound.isEmpty()) {
                     status->result->error = "unsupported outbound";
                     return {};
diff --git a/db/ConfigBuilder.hpp b/db/ConfigBuilder.hpp
index e80b2b5..7ca4925 100644
--- a/db/ConfigBuilder.hpp
+++ b/db/ConfigBuilder.hpp
@@ -14,7 +14,7 @@ namespace NekoRay {
         QSharedPointer<traffic::TrafficData> outboundStat;         // main
         QStringList ignoreConnTag;
 
-        QList<sys::ExternalProcess *> ext;
+        std::list<std::pair<fmt::ExternalBuildResult, QSharedPointer<sys::ExternalProcess>>> exts; // extR to extC
     };
 
     class BuildConfigStatus {
diff --git a/fmt/Bean2External.cpp b/fmt/Bean2External.cpp
index a8b45e6..0cf183c 100644
--- a/fmt/Bean2External.cpp
+++ b/fmt/Bean2External.cpp
@@ -20,7 +20,7 @@
     auto TempFile = QFileInfo(f).absoluteFilePath();
 
 namespace NekoRay::fmt {
-    // 0: no external
+    // 0: Internal
     // 1: Mapping External
     // 2: Direct External
 
@@ -85,13 +85,10 @@ namespace NekoRay::fmt {
 
         for (int i = 0; i < result.arguments.length(); i++) {
             auto arg = result.arguments[i];
-            if (arg.contains("%mapping_port%")) {
-                arg = arg.replace("%mapping_port%", Int2String(mapping_port));
-            } else if (arg.contains("%socks_port%")) {
-                arg = arg.replace("%socks_port%", Int2String(socks_port));
-            } else {
-                continue;
-            }
+            arg = arg.replace("%mapping_port%", Int2String(mapping_port));
+            arg = arg.replace("%socks_port%", Int2String(socks_port));
+            arg = arg.replace("%server_addr%", serverAddress);
+            arg = arg.replace("%server_port%", Int2String(serverPort));
             result.arguments[i] = arg;
         }
 
diff --git a/fmt/CustomBean.hpp b/fmt/CustomBean.hpp
index a6d8409..7c0a610 100644
--- a/fmt/CustomBean.hpp
+++ b/fmt/CustomBean.hpp
@@ -9,12 +9,16 @@ namespace NekoRay::fmt {
         QList<QString> command;
         QString config_suffix;
         QString config_simple;
+        int mapping_port = 0;
+        int socks_port = 0;
 
         CustomBean() : AbstractBean(0) {
             _add(new configItem("core", &core, itemType::string));
             _add(new configItem("cmd", &command, itemType::stringList));
             _add(new configItem("cs", &config_simple, itemType::string));
             _add(new configItem("cs_suffix", &config_suffix, itemType::string));
+            _add(new configItem("mapping_port", &mapping_port, itemType::integer));
+            _add(new configItem("socks_port", &socks_port, itemType::integer));
         };
 
         QString DisplayType() override {
diff --git a/sys/ExternalProcess.cpp b/sys/ExternalProcess.cpp
index 3a0e4d6..da6fc33 100644
--- a/sys/ExternalProcess.cpp
+++ b/sys/ExternalProcess.cpp
@@ -5,12 +5,17 @@
 #include <QApplication>
 
 namespace NekoRay::sys {
-    ExternalProcess::ExternalProcess() : QProcess() {}
+    ExternalProcess::ExternalProcess() : QProcess() {
+        // qDebug() << "[Debug] ExternalProcess()" << this << running_ext;
+    }
+
+    ExternalProcess::~ExternalProcess() {
+        // qDebug() << "[Debug] ~ExternalProcess()" << this << running_ext;
+    }
 
     void ExternalProcess::Start() {
         if (started) return;
         started = true;
-        if (managed) running_ext.push_back(this);
 
         if (show_log) {
             connect(this, &QProcess::readyReadStandardOutput, this, [&]() {
@@ -19,14 +24,11 @@ namespace NekoRay::sys {
             connect(this, &QProcess::readyReadStandardError, this, [&]() {
                 MW_show_log_ext_vt100(readAllStandardError().trimmed());
             });
-        }
-
-        if (managed) {
             connect(this, &QProcess::errorOccurred, this, [&](QProcess::ProcessError error) {
                 if (!killed) {
                     crashed = true;
                     MW_show_log_ext(tag, "errorOccurred:" + errorString());
-                    MW_dialog_message("ExternalProcess", "Crashed");
+                    if (managed) MW_dialog_message("ExternalProcess", "Crashed");
                 }
             });
             connect(this, &QProcess::stateChanged, this, [&](QProcess::ProcessState state) {
@@ -37,7 +39,7 @@ namespace NekoRay::sys {
                         crashed = true;
                         MW_show_log_ext(tag, "[Error] Program exited accidentally: " + errorString());
                         Kill();
-                        MW_dialog_message("ExternalProcess", "Crashed");
+                        if (managed) MW_dialog_message("ExternalProcess", "Crashed");
                     }
                 }
             });
@@ -51,7 +53,6 @@ namespace NekoRay::sys {
     void ExternalProcess::Kill() {
         if (killed) return;
         killed = true;
-        if (managed) running_ext.removeAll(this);
 
         if (!crashed) {
             QProcess::kill();
@@ -59,7 +60,7 @@ namespace NekoRay::sys {
         }
     }
 
-    CoreProcess::CoreProcess(const QString &core_path, const QStringList &args) {
+    CoreProcess::CoreProcess(const QString &core_path, const QStringList &args) : ExternalProcess() {
         ExternalProcess::managed = false;
         ExternalProcess::show_log = false;
         ExternalProcess::program = core_path;
diff --git a/sys/ExternalProcess.hpp b/sys/ExternalProcess.hpp
index 0459820..426dcd3 100644
--- a/sys/ExternalProcess.hpp
+++ b/sys/ExternalProcess.hpp
@@ -12,10 +12,11 @@ namespace NekoRay::sys {
         QStringList arguments;
         QStringList env;
 
-        bool managed = true; // running_ext & stateChanged
+        bool managed = true; // MW_dialog_message
         bool show_log = true;
 
         ExternalProcess();
+        ~ExternalProcess();
 
         // start & kill is one time
 
@@ -41,6 +42,6 @@ namespace NekoRay::sys {
         int restart_id = -1;
     };
 
-    // start & kill change this list
-    inline QList<ExternalProcess *> running_ext;
+    // 手动管理
+    inline QList<QSharedPointer<ExternalProcess>> running_ext;
 } // namespace NekoRay::sys
diff --git a/translations/fa_IR.ts b/translations/fa_IR.ts
index a248846..4d64f03 100644
--- a/translations/fa_IR.ts
+++ b/translations/fa_IR.ts
@@ -601,10 +601,6 @@
         <source>Config Suffix</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <source>Generator</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <source>Please read the documentation. If you don&apos;t understand, use a share link instead.</source>
         <translation type="unfinished"></translation>
@@ -617,6 +613,22 @@
         <source>Please pick a core.</source>
         <translation>لطفا یک هسته انتخاب کنید.</translation>
     </message>
+    <message>
+        <source>Random if it&apos;s empty or zero.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Preview</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Preview replace</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Preview config</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>EditNaive</name>
diff --git a/translations/zh_CN.ts b/translations/zh_CN.ts
index 9fdbec9..56bf7da 100644
--- a/translations/zh_CN.ts
+++ b/translations/zh_CN.ts
@@ -591,10 +591,6 @@
         <source>Command</source>
         <translation>命令</translation>
     </message>
-    <message>
-        <source>Generator</source>
-        <translation>生成器</translation>
-    </message>
     <message>
         <source>Json Editor</source>
         <translation>JSON 编辑器</translation>
@@ -615,6 +611,22 @@
         <source>Config Suffix</source>
         <translation>配置文件后缀</translation>
     </message>
+    <message>
+        <source>Random if it&apos;s empty or zero.</source>
+        <translation>如果为空或为零，则表示使用随机端口。</translation>
+    </message>
+    <message>
+        <source>Preview</source>
+        <translation>预览</translation>
+    </message>
+    <message>
+        <source>Preview replace</source>
+        <translation>预览替换串</translation>
+    </message>
+    <message>
+        <source>Preview config</source>
+        <translation>预览配置</translation>
+    </message>
 </context>
 <context>
     <name>EditNaive</name>
diff --git a/ui/edit/dialog_edit_profile.cpp b/ui/edit/dialog_edit_profile.cpp
index 97d568e..206048f 100644
--- a/ui/edit/dialog_edit_profile.cpp
+++ b/ui/edit/dialog_edit_profile.cpp
@@ -234,12 +234,11 @@ void DialogEditProfile::typeSelected(const QString &newType) {
     delete old;
 
     // 左边 bean inner editor
-    innerEditor->get_edit_dialog = [&]() {
-        return (QWidget *) this;
-    };
-    innerEditor->editor_cache_updated = [=] {
-        editor_cache_updated_impl();
-    };
+    innerEditor->get_edit_dialog = [&]() { return (QWidget *) this; };
+    innerEditor->get_edit_text_name = [&]() { return ui->name->text(); };
+    innerEditor->get_edit_text_serverAddress = [&]() { return ui->address->text(); };
+    innerEditor->get_edit_text_serverPort = [&]() { return ui->port->text(); };
+    innerEditor->editor_cache_updated = [=] { editor_cache_updated_impl(); };
     innerEditor->onStart(ent);
 
     // 左边 common
diff --git a/ui/edit/edit_custom.cpp b/ui/edit/edit_custom.cpp
index daa5be7..e0dbb9b 100644
--- a/ui/edit/edit_custom.cpp
+++ b/ui/edit/edit_custom.cpp
@@ -4,6 +4,11 @@
 #include "qv2ray/v2/ui/widgets/editors/w_JsonEditor.hpp"
 #include "fmt/CustomBean.hpp"
 #include "fmt/Preset.hpp"
+#include "db/ConfigBuilder.hpp"
+#include "db/Database.hpp"
+
+#include <QMessageBox>
+#include <QClipboard>
 
 EditCustom::EditCustom(QWidget *parent) : QWidget(parent), ui(new Ui::EditCustom) {
     ui->setupUi(this);
@@ -20,6 +25,14 @@ EditCustom::~EditCustom() {
     delete ui;
 }
 
+#define SAVE_CUSTOM_BEAN                            \
+    P_SAVE_COMBO(core)                              \
+    bean->command = ui->command->text().split(" "); \
+    P_SAVE_STRING_QTEXTEDIT(config_simple)          \
+    P_SAVE_COMBO(config_suffix)                     \
+    P_SAVE_INT(mapping_port)                        \
+    P_SAVE_INT(socks_port)
+
 void EditCustom::onStart(QSharedPointer<NekoRay::ProxyEntity> _ent) {
     this->ent = _ent;
     auto bean = this->ent->CustomBean();
@@ -50,6 +63,8 @@ void EditCustom::onStart(QSharedPointer<NekoRay::ProxyEntity> _ent) {
     ui->command->setText(bean->command.join(" "));
     P_LOAD_STRING(config_simple)
     P_LOAD_COMBO(config_suffix)
+    P_LOAD_INT(mapping_port)
+    P_LOAD_INT(socks_port)
 
     // custom external
     if (!bean->core.isEmpty()) {
@@ -72,17 +87,46 @@ void EditCustom::onStart(QSharedPointer<NekoRay::ProxyEntity> _ent) {
         ui->config_suffix_l->hide();
     }
 
-    // Generators
-    ui->generator->setVisible(false);
+    // Preview
+    connect(ui->preview, &QPushButton::clicked, this, [=] {
+        // CustomBean::BuildExternal
+        QStringList th;
+        auto mapping_port = ui->mapping_port->text().toInt();
+        auto socks_port = ui->socks_port->text().toInt();
+        th << "%mapping_port% => " + (mapping_port <= 0 ? "Random" : Int2String(mapping_port));
+        th << "%socks_port% => " + (socks_port <= 0 ? "Random" : Int2String(socks_port));
+        th << "%server_addr% => " + get_edit_text_serverAddress();
+        th << "%server_port% => " + get_edit_text_serverPort();
+        MessageBoxInfo(tr("Preview replace"), th.join("\n"));
+        // EditCustom::onEnd
+        auto tmpEnt = NekoRay::ProfileManager::NewProxyEntity("custom");
+        auto bean = tmpEnt->CustomBean();
+        SAVE_CUSTOM_BEAN
+        if (bean->core.isEmpty()) return;
+        //
+        auto result = NekoRay::BuildConfig(tmpEnt, false, false);
+        if (!result->error.isEmpty()) {
+            MessageBoxInfo(software_name, result->error);
+            return;
+        }
+        for (const auto &ext: result->exts) {
+            auto extR = ext.first;
+            auto command = QStringList{extR.program};
+            command += extR.arguments;
+            auto btn = QMessageBox::information(this, tr("Preview config"),
+                                                QString("Command: %1\n\n%2").arg(QStringList2Command(command), extR.config_export),
+                                                "OK", "Copy", "", 0, 0);
+            if (btn == 1) {
+                QApplication::clipboard()->setText(extR.config_export);
+            }
+        }
+    });
 }
 
 bool EditCustom::onEnd() {
     auto bean = this->ent->CustomBean();
 
-    P_SAVE_COMBO(core)
-    bean->command = ui->command->text().split(" ");
-    P_SAVE_STRING_QTEXTEDIT(config_simple)
-    P_SAVE_COMBO(config_suffix)
+    SAVE_CUSTOM_BEAN
 
     if (bean->core.isEmpty()) {
         MessageBoxWarning(software_name, tr("Please pick a core."));
diff --git a/ui/edit/edit_custom.ui b/ui/edit/edit_custom.ui
index ce90ad5..4ed650c 100644
--- a/ui/edit/edit_custom.ui
+++ b/ui/edit/edit_custom.ui
@@ -7,129 +7,136 @@
     <x>0</x>
     <y>0</y>
     <width>400</width>
-    <height>400</height>
+    <height>450</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string notr="true">EditCustom</string>
   </property>
-  <layout class="QHBoxLayout" name="layout">
+  <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <layout class="QVBoxLayout" name="verticalLayout_2">
+    <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
-      <layout class="QHBoxLayout" name="horizontalLayout">
-       <item>
-        <widget class="QLabel" name="core_l">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="text">
-          <string>Core</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QComboBox" name="core">
-         <property name="editable">
-          <bool>true</bool>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="as_json">
-         <property name="text">
-          <string>Json Editor</string>
-         </property>
-        </widget>
-       </item>
-      </layout>
+      <widget class="QLabel" name="core_l">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="text">
+        <string>Core</string>
+       </property>
+      </widget>
      </item>
      <item>
-      <layout class="QHBoxLayout" name="horizontalLayout_2">
-       <item>
-        <widget class="QLabel" name="command_l">
-         <property name="text">
-          <string>Command</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLineEdit" name="command">
-         <property name="placeholderText">
-          <string notr="true">%config%</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLabel" name="config_suffix_l">
-         <property name="text">
-          <string>Config Suffix</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QComboBox" name="config_suffix">
-         <property name="editable">
-          <bool>true</bool>
-         </property>
-         <item>
-          <property name="text">
-           <string notr="true"/>
-          </property>
-         </item>
-         <item>
-          <property name="text">
-           <string notr="true">json</string>
-          </property>
-         </item>
-        </widget>
-       </item>
-      </layout>
+      <widget class="QComboBox" name="core">
+       <property name="editable">
+        <bool>true</bool>
+       </property>
+      </widget>
      </item>
      <item>
-      <widget class="QTextEdit" name="config_simple">
-       <property name="minimumSize">
-        <size>
-         <width>0</width>
-         <height>300</height>
-        </size>
+      <widget class="QPushButton" name="as_json">
+       <property name="text">
+        <string>Json Editor</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
-    <widget class="QGroupBox" name="generator">
-     <property name="title">
-      <string>Generator</string>
-     </property>
-     <layout class="QVBoxLayout" name="verticalLayout">
-      <property name="leftMargin">
-       <number>0</number>
-      </property>
-      <property name="topMargin">
-       <number>0</number>
-      </property>
-      <property name="rightMargin">
-       <number>0</number>
-      </property>
-      <property name="bottomMargin">
-       <number>0</number>
-      </property>
-      <item>
-       <widget class="QWidget" name="fake" native="true">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
-          <horstretch>0</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QLabel" name="command_l">
+       <property name="text">
+        <string>Command</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="command">
+       <property name="placeholderText">
+        <string notr="true">%config%</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLabel" name="config_suffix_l">
+       <property name="text">
+        <string>Config Suffix</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QComboBox" name="config_suffix">
+       <property name="editable">
+        <bool>true</bool>
+       </property>
+       <item>
+        <property name="text">
+         <string notr="true"/>
         </property>
-       </widget>
-      </item>
-     </layout>
+       </item>
+       <item>
+        <property name="text">
+         <string notr="true">json</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string notr="true">yml</string>
+        </property>
+       </item>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="toolTip">
+        <string>Random if it's empty or zero.</string>
+       </property>
+       <property name="text">
+        <string notr="true">Mapping Port</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="mapping_port"/>
+     </item>
+     <item>
+      <widget class="QLabel" name="label_2">
+       <property name="toolTip">
+        <string>Random if it's empty or zero.</string>
+       </property>
+       <property name="text">
+        <string notr="true">Socks Port</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="socks_port"/>
+     </item>
+     <item>
+      <widget class="QPushButton" name="preview">
+       <property name="text">
+        <string>Preview</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QTextEdit" name="config_simple">
+     <property name="minimumSize">
+      <size>
+       <width>0</width>
+       <height>300</height>
+      </size>
+     </property>
     </widget>
    </item>
   </layout>
@@ -138,6 +145,11 @@
   <tabstop>core</tabstop>
   <tabstop>as_json</tabstop>
   <tabstop>command</tabstop>
+  <tabstop>config_suffix</tabstop>
+  <tabstop>mapping_port</tabstop>
+  <tabstop>socks_port</tabstop>
+  <tabstop>preview</tabstop>
+  <tabstop>config_simple</tabstop>
  </tabstops>
  <resources/>
  <connections/>
diff --git a/ui/edit/profile_editor.h b/ui/edit/profile_editor.h
index a7cd5c7..80347ac 100644
--- a/ui/edit/profile_editor.h
+++ b/ui/edit/profile_editor.h
@@ -12,6 +12,9 @@ public:
     virtual bool onEnd() = 0;
 
     std::function<QWidget *()> get_edit_dialog;
+    std::function<QString()> get_edit_text_name;
+    std::function<QString()> get_edit_text_serverAddress;
+    std::function<QString()> get_edit_text_serverPort;
 
     // cached editor
 
diff --git a/ui/mainwindow_grpc.cpp b/ui/mainwindow_grpc.cpp
index a22d94d..10c8949 100644
--- a/ui/mainwindow_grpc.cpp
+++ b/ui/mainwindow_grpc.cpp
@@ -100,15 +100,15 @@ void MainWindow::speedtest_current_group(int mode) {
                     req.set_url(NekoRay::dataStore->test_url.toStdString());
 
                     //
-                    QList<NekoRay::sys::ExternalProcess *> ext;
+                    std::list<std::pair<NekoRay::fmt::ExternalBuildResult, QSharedPointer<NekoRay::sys::ExternalProcess>>> exts;
 
                     if (mode == libcore::TestMode::UrlTest || mode == libcore::FullTest) {
                         auto c = NekoRay::BuildConfig(profile, true, false);
-                        // external test ???
-                        if (!c->ext.isEmpty()) {
-                            ext = c->ext;
-                            for (auto extC: ext) {
-                                extC->Start();
+                        // TODO refactor external test
+                        if (!c->exts.empty()) {
+                            exts = c->exts;
+                            for (const auto &ext: exts) {
+                                ext.second->Start();
                             }
                             QThread::msleep(500);
                         }
@@ -128,9 +128,8 @@ void MainWindow::speedtest_current_group(int mode) {
 
                     bool rpcOK;
                     auto result = defaultClient->Test(&rpcOK, req);
-                    for (auto extC: ext) {
-                        extC->Kill();
-                        extC->deleteLater();
+                    for (const auto &ext: exts) {
+                        ext.second->Kill();
                     }
                     if (!rpcOK) return;
 
@@ -236,8 +235,9 @@ void MainWindow::neko_start(int _id) {
     NekoRay::traffic::trafficLooper->loop_enabled = true;
 #endif
 
-    for (auto extC: result->ext) {
-        extC->Start();
+    for (const auto &ext: result->exts) {
+        NekoRay::sys::running_ext.push_back(ext.second);
+        ext.second->Start();
     }
 
     NekoRay::dataStore->UpdateStartedId(ent->id);
@@ -254,7 +254,6 @@ void MainWindow::neko_stop(bool crash) {
     while (!NekoRay::sys::running_ext.isEmpty()) {
         auto extC = NekoRay::sys::running_ext.takeFirst();
         extC->Kill();
-        extC->deleteLater();
     }
 
 #ifndef NKR_NO_GRPC