diff --git a/app/src/main/java/io/github/chronosx88/influence/helpers/MessageActions.java b/app/src/main/java/io/github/chronosx88/influence/helpers/MessageActions.java
index c5da1c3..ab68f13 100644
--- a/app/src/main/java/io/github/chronosx88/influence/helpers/MessageActions.java
+++ b/app/src/main/java/io/github/chronosx88/influence/helpers/MessageActions.java
@@ -3,4 +3,6 @@ package io.github.chronosx88.influence.helpers;
 public class MessageActions {
     public static final int BOOTSTRAP_NOT_SPECIFIED = 0x0;
     public static final int NETWORK_ERROR = 0x1;
+    public static final int BOOTSTRAP_SUCCESS = 0x2;
+    public static final int PORT_FORWARDING_ERROR = 0x3;
 }
diff --git a/app/src/main/java/io/github/chronosx88/influence/models/MainModel.java b/app/src/main/java/io/github/chronosx88/influence/models/MainModel.java
index d338222..e5134bb 100644
--- a/app/src/main/java/io/github/chronosx88/influence/models/MainModel.java
+++ b/app/src/main/java/io/github/chronosx88/influence/models/MainModel.java
@@ -18,6 +18,7 @@ import org.json.JSONObject;
 import java.io.IOException;
 import java.net.Inet4Address;
 import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.util.UUID;
 import java.util.regex.Pattern;
 
@@ -35,7 +36,7 @@ public class MainModel implements MainModelContract {
 
     public MainModel() {
         this.context = AppHelper.getContext();
-        this.preferences = context.getSharedPreferences("main_config", context.MODE_PRIVATE);
+        this.preferences = context.getSharedPreferences("io.github.chronosx88.influence_preferences", context.MODE_PRIVATE);
     }
 
     @Override
@@ -58,30 +59,61 @@ public class MainModel implements MainModelContract {
                 peerDHT = new PeerBuilderDHT(
                         new PeerBuilder(peerID)
                                 .ports(7243)
-                                .behindFirewall(true)
                                 .start()
                 )
                         .storage(new StorageMVStore(peerID, context.getFilesDir()))
                         .start();
                 try {
-                    String bootstrapIP = preferences.getString("bootstrapIP", null);
-                    bootstrapAddress = bootstrapIP == null ? null : Inet4Address.getByName(bootstrapIP);
-                    if(bootstrapAddress == null) {
-                        throw new Exception();
+                    String bootstrapIP = this.preferences.getString("bootstrapAddress", null);
+                    if(bootstrapIP == null) {
+                        throw new NullPointerException();
                     }
-                } catch (Exception e) {
+                    bootstrapAddress = Inet4Address.getByName(bootstrapIP);
+                } catch (NullPointerException e) {
                     try {
                         AppHelper.getObservable().notifyObservers(new JSONObject()
                                 .put("action", MessageActions.BOOTSTRAP_NOT_SPECIFIED));
+                        peerDHT.shutdown();
+                        return;
+                    } catch (JSONException ex) {
+                        ex.printStackTrace();
+                    }
+                } catch (UnknownHostException e) {
+                    try {
+                        AppHelper.getObservable().notifyObservers(new JSONObject()
+                                .put("action", MessageActions.NETWORK_ERROR));
+                        peerDHT.shutdown();
+                        return;
+                    } catch (JSONException ex) {
+                        ex.printStackTrace();
+                    }
+                }
+
+                FutureDiscover futureDiscover = peerDHT.peer().discover().inetAddress(bootstrapAddress).ports(7243).start();
+                futureDiscover.awaitUninterruptibly();
+                if(futureDiscover.isSuccess()) {
+                    Log.d("MainModel", "Success discover! Your IP: " + futureDiscover.externalAddress().toString());
+                } else {
+                    try {
+                        AppHelper.getObservable().notifyObservers(new JSONObject()
+                                .put("action", MessageActions.PORT_FORWARDING_ERROR));
+                        peerDHT.shutdown();
                         return;
                     } catch (JSONException ex) {
                         ex.printStackTrace();
                     }
                 }
 
-                FutureDiscover futureDiscover = peerDHT.peer().discover().inetAddress(bootstrapAddress).ports(7243).start().awaitUninterruptibly();
                 FutureBootstrap futureBootstrap = peerDHT.peer().bootstrap().inetAddress(bootstrapAddress).ports(7243).start();
                 futureBootstrap.awaitUninterruptibly();
+                if(futureBootstrap.isSuccess()) {
+                    try {
+                        AppHelper.getObservable().notifyObservers(new JSONObject()
+                                .put("action", MessageActions.BOOTSTRAP_SUCCESS));
+                    } catch (JSONException ex) {
+                        ex.printStackTrace();
+                    }
+                }
             } catch (IOException e) {
                 e.printStackTrace();
             }
diff --git a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
index 3c5836b..bef2114 100644
--- a/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
+++ b/app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java
@@ -96,7 +96,28 @@ public class MainActivity extends AppCompatActivity implements Observer, MainVie
                         progressDialog.dismiss();
                         Toast.makeText(this, "Bootstrap-нода не указана. Прерываю подключение к сети...", Toast.LENGTH_LONG).show();
                     });
-
+                    break;
+                }
+                case MessageActions.NETWORK_ERROR: {
+                    runOnUiThread(() -> {
+                        progressDialog.dismiss();
+                        Toast.makeText(this, "Ошибка сети. Возможно, нода недоступна, или у вас отсутствует Интернет.", Toast.LENGTH_LONG).show();
+                    });
+                    break;
+                }
+                case MessageActions.BOOTSTRAP_SUCCESS: {
+                    runOnUiThread(() -> {
+                        progressDialog.dismiss();
+                        Toast.makeText(this, "Нода успешно запущена!", Toast.LENGTH_LONG).show();
+                    });
+                    break;
+                }
+                case MessageActions.PORT_FORWARDING_ERROR: {
+                    runOnUiThread(() -> {
+                        progressDialog.dismiss();
+                        Toast.makeText(this, "Проблемы с пробросом портов. Возможно, у вас не настроен uPnP.", Toast.LENGTH_LONG).show();
+                    });
+                    break;
                 }
             }
         } catch (JSONException e) {
diff --git a/build.gradle b/build.gradle
index cfb7d1e..c2f4631 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
+        classpath 'com.android.tools.build:gradle:3.3.2'
         
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files