diff --git a/src/main/java/name/nathanmcrae/numbersstation/MainSettingsController.java b/src/main/java/name/nathanmcrae/numbersstation/MainSettingsController.java
index 2b02eba..3ec730b 100644
--- a/src/main/java/name/nathanmcrae/numbersstation/MainSettingsController.java
+++ b/src/main/java/name/nathanmcrae/numbersstation/MainSettingsController.java
@@ -22,6 +22,7 @@ import javafx.collections.ObservableList;
 import javafx.event.Event;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
+import javafx.scene.control.Button;
 import javafx.scene.control.CheckBox;
 import javafx.scene.control.DatePicker;
 import javafx.scene.control.ListCell;
@@ -98,6 +99,9 @@ public class MainSettingsController {
     @FXML
     private TextField scheduleStartTimeField;
 
+    @FXML
+    private Button testConnectionButton;
+
     @FXML
     private RadioButton externalProgramRadioButton;
 
@@ -313,6 +317,11 @@ public class MainSettingsController {
         });
 
         externalProgramCommandField.disableProperty().bind(externalProgramRadioButton.selectedProperty().not());
+
+        stationAddressField.disableProperty().bind(externalProgramRadioButton.selectedProperty());
+        usernameField.disableProperty().bind(externalProgramRadioButton.selectedProperty());
+        passwordField.disableProperty().bind(externalProgramRadioButton.selectedProperty());
+        testConnectionButton.disableProperty().bind(externalProgramRadioButton.selectedProperty());
     }
 
     @FXML
diff --git a/src/main/java/name/nathanmcrae/numbersstation/MainSettingsView.fxml b/src/main/java/name/nathanmcrae/numbersstation/MainSettingsView.fxml
index 1ecf59b..c04845c 100644
--- a/src/main/java/name/nathanmcrae/numbersstation/MainSettingsView.fxml
+++ b/src/main/java/name/nathanmcrae/numbersstation/MainSettingsView.fxml
@@ -97,7 +97,7 @@
                         <TextField fx:id="usernameField" layoutX="444.0" layoutY="65.0" prefHeight="25.0" prefWidth="135.0" AnchorPane.rightAnchor="0.0" />
                         <PasswordField fx:id="passwordField" layoutX="444.0" layoutY="95.0" prefHeight="25.0" prefWidth="135.0" AnchorPane.rightAnchor="0.0" />
                         <TextField fx:id="externalProgramCommandField" layoutX="140.0" layoutY="131.0" prefHeight="25.0" prefWidth="438.0" AnchorPane.leftAnchor="140.0" AnchorPane.rightAnchor="0.0" />
-                        <Button layoutX="188.0" layoutY="65.0" mnemonicParsing="false" onMousePressed="#handleTestConnectionButtonPress" text="Test connection" />
+                        <Button fx:id="testConnectionButton" layoutX="188.0" layoutY="65.0" mnemonicParsing="false" onMousePressed="#handleTestConnectionButtonPress" text="Test connection" />
                      
                    </children>
                      <VBox.margin>