diff --git a/G-Earth/src/main/java/gearth/protocol/HConnection.java b/G-Earth/src/main/java/gearth/protocol/HConnection.java
index 5724528..f2124c9 100644
--- a/G-Earth/src/main/java/gearth/protocol/HConnection.java
+++ b/G-Earth/src/main/java/gearth/protocol/HConnection.java
@@ -62,6 +62,11 @@ public class HConnection {
             if (proxyProvider != null) {
                 proxyProvider.start();
             }
+            else {
+                // trigger UI update
+                setState(HState.ABORTING);
+                setState(HState.NOT_CONNECTED);
+            }
         } catch (IOException e) {
             e.printStackTrace();
         }
diff --git a/G-Earth/src/main/java/gearth/protocol/connection/proxy/ProxyProviderFactory.java b/G-Earth/src/main/java/gearth/protocol/connection/proxy/ProxyProviderFactory.java
index 558d2a7..bc5251b 100644
--- a/G-Earth/src/main/java/gearth/protocol/connection/proxy/ProxyProviderFactory.java
+++ b/G-Earth/src/main/java/gearth/protocol/connection/proxy/ProxyProviderFactory.java
@@ -5,6 +5,10 @@ import gearth.misc.OSValidator;
 import gearth.protocol.HConnection;
 import gearth.protocol.connection.HProxySetter;
 import gearth.protocol.connection.HStateSetter;
+import javafx.application.Platform;
+import javafx.scene.control.Alert;
+import javafx.scene.control.ButtonType;
+import javafx.scene.layout.Region;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -92,6 +96,16 @@ public class ProxyProviderFactory {
             else if (config.useSocks()) {
                 return new SocksProxyProvider(proxySetter, stateSetter, hConnection, domain, port);
             }
+
+            Platform.runLater(() -> {
+                Alert alert = new Alert(Alert.AlertType.ERROR, "G-Earth is already connected to this hotel. " +
+                        "Due to current limitations you can only connect one session per hotel to G-Earth in Raw IP mode.\n\n" +
+                        "You can bypass this by using a SOCKS proxy [Extra -> Advanced -> SOCKS]", ButtonType.OK);
+                alert.getDialogPane().setMinHeight(Region.USE_PREF_SIZE);
+                alert.setResizable(false);
+                alert.show();
+            });
+
             return null;
         }
         else {
diff --git a/G-Earth/src/main/java/gearth/protocol/connection/proxy/RawIpProxyProvider.java b/G-Earth/src/main/java/gearth/protocol/connection/proxy/RawIpProxyProvider.java
index 86184c4..2382907 100644
--- a/G-Earth/src/main/java/gearth/protocol/connection/proxy/RawIpProxyProvider.java
+++ b/G-Earth/src/main/java/gearth/protocol/connection/proxy/RawIpProxyProvider.java
@@ -52,7 +52,11 @@ public class RawIpProxyProvider extends ProxyProvider {
                 stateSetter.setState(HState.PREPARING);
                 proxy = new HProxy(input_host, input_host, input_port, input_port, "0.0.0.0");
 
-                onBeforeIpMapping();
+                if (!onBeforeIpMapping()) {
+                    stateSetter.setState(HState.NOT_CONNECTED);
+                    return;
+                }
+
                 maybeAddMapping();
 
                 if (HConnection.DEBUG) System.out.println("Added mapping for raw IP");
@@ -98,6 +102,12 @@ public class RawIpProxyProvider extends ProxyProvider {
         super.abort();
     }
 
+    @Override
+    protected void onConnect() {
+        super.onConnect();
+        tryCloseProxy();
+    }
+
     @Override
     protected void onConnectEnd() {
         if (hasMapped) {
@@ -119,7 +129,8 @@ public class RawIpProxyProvider extends ProxyProvider {
 
     private Queue<Socket> preConnectedServerConnections;
 
-    protected void onBeforeIpMapping() throws IOException, InterruptedException {
+    // returns false if fail
+    protected boolean onBeforeIpMapping() throws IOException, InterruptedException {
         preConnectedServerConnections = new LinkedList<>();
         for (int i = 0; i < 3; i++) {
             Socket s1 = new Socket();
@@ -128,14 +139,15 @@ public class RawIpProxyProvider extends ProxyProvider {
                 s1.connect(new InetSocketAddress(proxy.getActual_domain(), proxy.getActual_port()), 1200);
             }
             catch (SocketTimeoutException e) {
-                stateSetter.setState(HState.NOT_CONNECTED);
                 showInvalidConnectionError();
-                return;
+                return false;
             }
 
             preConnectedServerConnections.add(s1);
             Thread.sleep(50);
         }
+
+        return true;
     }
 
     protected void createProxyThread(Socket client) throws IOException, InterruptedException {
@@ -215,7 +227,7 @@ public class RawIpProxyProvider extends ProxyProvider {
 
     private void removeMappingCache() {
         JSONObject connections = getCurrentConnectionsCache();
-        connections.remove(proxy.getActual_domain());
+        connections.remove(INSTANCE_ID.toString());
         saveCurrentConnectionsCache(connections);
     }
 
@@ -234,7 +246,7 @@ public class RawIpProxyProvider extends ProxyProvider {
 
 
     static private JSONObject getCurrentConnectionsCache(String actual_host) {
-        if (!Cacher.getCacheContents().has(actual_host)) {
+        if (!Cacher.getCacheContents().has(RAWIP_CONNECTIONS)) {
             Cacher.put(RAWIP_CONNECTIONS, new JSONObject());
         }
         JSONObject gearthConnections = Cacher.getCacheContents().getJSONObject(RAWIP_CONNECTIONS);
@@ -252,7 +264,7 @@ public class RawIpProxyProvider extends ProxyProvider {
         BigInteger timeoutTimestamp = BigInteger.valueOf(System.currentTimeMillis() - 60000);
         for (String key : connections.keySet()) {
             JSONObject connection = connections.getJSONObject(key);
-            if (!connection.getString("id").equals(INSTANCE_ID.toString())) {
+            if (!key.equals(INSTANCE_ID.toString())) {
                 if (connection.getBigInteger("timestamp").compareTo(timeoutTimestamp) > 0) {
                     return false;
                 }
diff --git a/G-Earth/src/main/java/gearth/protocol/connection/proxy/SocksProxyProvider.java b/G-Earth/src/main/java/gearth/protocol/connection/proxy/SocksProxyProvider.java
index d970864..c69fb43 100644
--- a/G-Earth/src/main/java/gearth/protocol/connection/proxy/SocksProxyProvider.java
+++ b/G-Earth/src/main/java/gearth/protocol/connection/proxy/SocksProxyProvider.java
@@ -20,8 +20,8 @@ public class SocksProxyProvider extends RawIpProxyProvider {
     }
 
     @Override
-    protected void onBeforeIpMapping() {
-        // do nothing
+    protected boolean onBeforeIpMapping() {
+        return true;
     }
 
     @Override