diff --git a/app/Server/Factory.php b/app/Server/Factory.php
index 8efd8f6..fba4170 100644
--- a/app/Server/Factory.php
+++ b/app/Server/Factory.php
@@ -106,7 +106,7 @@ class Factory
 
     protected function addAdminRoutes()
     {
-        $adminCondition = 'request.headers.get("Host") matches "/'.config('expose.dashboard_subdomain').'./i"';
+        $adminCondition = 'request.headers.get("Host") matches "/'.config('expose.dashboard_subdomain').'\./i"';
 
         $this->router->get('/', LoginController::class, $adminCondition);
         $this->router->post('/', VerifyLoginController::class, $adminCondition);
@@ -121,6 +121,8 @@ class Factory
         app()->singleton(Configuration::class, function ($app) {
             return new Configuration($this->hostname, $this->port);
         });
+
+        return $this;
     }
 
     protected function bindSubdomainGenerator()
@@ -128,6 +130,8 @@ class Factory
         app()->singleton(SubdomainGenerator::class, function ($app) {
             return $app->make(RandomSubdomainGenerator::class);
         });
+
+        return $this;
     }
 
     protected function bindConnectionManager()
@@ -135,23 +139,20 @@ class Factory
         app()->singleton(ConnectionManagerContract::class, function ($app) {
             return $app->make(ConnectionManager::class);
         });
+
+        return $this;
     }
 
     public function createServer()
     {
         $socket = new Server("{$this->host}:{$this->port}", $this->loop);
 
-        $this->bindConfiguration();
-
-        $this->bindSubdomainGenerator();
-
-        $this->bindDatabase();
-
-        $this->ensureDatabaseIsInitialized();
-
-        $this->bindConnectionManager();
-
-        $this->addAdminRoutes();
+        $this->bindConfiguration()
+            ->bindSubdomainGenerator()
+            ->bindDatabase()
+            ->ensureDatabaseIsInitialized()
+            ->bindConnectionManager()
+            ->addAdminRoutes();
 
         $controlConnection = $this->addControlConnectionRoute();
 
@@ -176,6 +177,8 @@ class Factory
             $factory = new \Clue\React\SQLite\Factory($this->loop);
             return $factory->openLazy(base_path('database/expose.db'));
         });
+
+        return $this;
     }
 
     protected function ensureDatabaseIsInitialized()
@@ -193,6 +196,8 @@ class Factory
         foreach ($migrations as $migration) {
             $db->exec($migration->getContents());
         }
+
+        return $this;
     }
 
     public function validateAuthTokens(bool $validate)
diff --git a/app/Server/Http/Controllers/TunnelMessageController.php b/app/Server/Http/Controllers/TunnelMessageController.php
index 20e4b50..3966617 100644
--- a/app/Server/Http/Controllers/TunnelMessageController.php
+++ b/app/Server/Http/Controllers/TunnelMessageController.php
@@ -9,6 +9,7 @@ use App\Server\Connections\ControlConnection;
 use GuzzleHttp\Psr7\Response;
 use Illuminate\Http\Request;
 use Illuminate\Pipeline\Pipeline;
+use Illuminate\Support\Str;
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Ratchet\ConnectionInterface;
 use Ratchet\RFC6455\Messaging\Frame;
@@ -37,10 +38,14 @@ class TunnelMessageController extends PostController
 
     public function handle(Request $request, ConnectionInterface $httpConnection)
     {
-        $controlConnection = $this->connectionManager->findControlConnectionForSubdomain($this->detectSubdomain($request));
+        $subdomain = $this->detectSubdomain($request);
+
+        $controlConnection = $this->connectionManager->findControlConnectionForSubdomain($subdomain);
 
         if (is_null($controlConnection)) {
-            $httpConnection->send(str(new Response(404, [], 'Not found')));
+            $httpConnection->send(
+                respond_html($this->getView('server.errors.404', ['subdomain' => $subdomain]))
+            );
             $httpConnection->close();
             return;
         }
@@ -50,9 +55,9 @@ class TunnelMessageController extends PostController
 
     protected function detectSubdomain(Request $request): ?string
     {
-        $domainParts = explode('.', $request->getHost());
+        $subdomain = Str::before($request->getHost(), '.'.$this->configuration->hostname());
 
-        return trim($domainParts[0]);
+        return $subdomain === $request->getHost() ? null : $subdomain;
     }
 
     protected function sendRequestToClient(Request $request, ControlConnection $controlConnection, ConnectionInterface $httpConnection)
@@ -85,7 +90,7 @@ class TunnelMessageController extends PostController
 
         $host = $this->configuration->hostname();
 
-        if (! $request->isSecure()) {
+        if (!$request->isSecure()) {
             $host .= ":{$this->configuration->port()}";
         }
 
@@ -93,7 +98,7 @@ class TunnelMessageController extends PostController
         $request->headers->set('X-Forwarded-Proto', $request->isSecure() ? 'https' : 'http');
         $request->headers->set('X-Expose-Request-ID', uniqid());
         $request->headers->set('Upgrade-Insecure-Requests', 1);
-        $request->headers->set('X-Exposed-By', config('app.name') . ' '. config('app.version'));
+        $request->headers->set('X-Exposed-By', config('app.name') . ' ' . config('app.version'));
         $request->headers->set('X-Original-Host', "{$controlConnection->subdomain}.{$host}");
 
         return $request;
diff --git a/resources/views/server/errors/404.twig b/resources/views/server/errors/404.twig
new file mode 100644
index 0000000..342b72b
--- /dev/null
+++ b/resources/views/server/errors/404.twig
@@ -0,0 +1 @@
+The tunnel {{ subdomain }} was not found.