diff --git a/README.md b/README.md
index 80ac90a..06f627d 100644
--- a/README.md
+++ b/README.md
@@ -112,8 +112,12 @@ return [
             'enabled' => env('NETWATCH_PROBE_DATABASE_TCP_ENABLED', false),
             'probe' => [
                 TcpPingProbe::class => [
-                    parse_url((string) env('DB_HOST'), PHP_URL_HOST) ?? env('DB_HOST'),
-                    (int) env('DB_PORT', 3306),
+                    parse_url((string) env('DB_HOST'), PHP_URL_HOST) ?: env('DB_HOST'),
+                    (int) (env('DB_PORT') ?: match (env('DB_CONNECTION')) {
+                        'pgsql' => 5432,
+                        'sqlsrv' => 1433,
+                        default => 3306,
+                    }),
                 ],
             ],
         ],
@@ -133,8 +137,8 @@ return [
             'enabled' => env('NETWATCH_PROBE_REDIS_TCP_ENABLED', false),
             'probe' => [
                 TcpPingProbe::class => [
-                    parse_url((string) env('REDIS_HOST'), PHP_URL_HOST) ?? env('REDIS_HOST'),
-                    (int) env('REDIS_PORT', 6379),
+                    parse_url((string) env('REDIS_HOST'), PHP_URL_HOST) ?: env('REDIS_HOST'),
+                    (int) (env('REDIS_PORT') ?: 6379),
                 ],
             ],
         ],
@@ -331,7 +335,7 @@ NETWATCH_PROBE_APP_WARN_MS=500
 NETWATCH_PROBE_APP_CRIT_MS=1000
 NETWATCH_PROBE_CLOUDFLARE_DNS_WARN_MS=35
 NETWATCH_PROBE_CLOUDFLARE_DNS_CRIT_MS=50
-NETWATCH_PROBE_GOOGLE_DNS_WARN_MS=25
+NETWATCH_PROBE_GOOGLE_DNS_WARN_MS=35
 NETWATCH_PROBE_GOOGLE_DNS_CRIT_MS=50
 ```
 
diff --git a/src/Laravel/Http/Middleware/Authorize.php b/src/Laravel/Http/Middleware/Authorize.php
index ce997ea..bc0c465 100644
--- a/src/Laravel/Http/Middleware/Authorize.php
+++ b/src/Laravel/Http/Middleware/Authorize.php
@@ -13,8 +13,9 @@ class Authorize
     public function handle(Request $request, Closure $next)
     {
         $token = config('netwatch.health_route.token');
+        $requestToken = $request->query('token');
 
-        if ($token && $request->query('token') && hash_equals($token, $request->query('token'))) {
+        if ($token && is_string($requestToken) && $requestToken !== '' && hash_equals($token, $requestToken)) {
             return $next($request);
         }
 
diff --git a/src/Laravel/config/netwatch.php b/src/Laravel/config/netwatch.php
index fc65277..979c3ab 100644
--- a/src/Laravel/config/netwatch.php
+++ b/src/Laravel/config/netwatch.php
@@ -76,8 +76,12 @@
             ],
             'probe' => [
                 TcpPingProbe::class => [
-                    parse_url((string) env('DB_HOST'), PHP_URL_HOST) ?? env('DB_HOST'),
-                    (int) env('DB_PORT', 3306),
+                    parse_url((string) env('DB_HOST'), PHP_URL_HOST) ?: env('DB_HOST'),
+                    (int) (env('DB_PORT') ?: match (env('DB_CONNECTION')) {
+                        'pgsql' => 5432,
+                        'sqlsrv' => 1433,
+                        default => 3306,
+                    }),
                 ],
             ],
         ],
@@ -105,8 +109,8 @@
             ],
             'probe' => [
                 TcpPingProbe::class => [
-                    parse_url((string) env('REDIS_HOST'), PHP_URL_HOST) ?? env('REDIS_HOST'),
-                    (int) env('REDIS_PORT', 6379),
+                    parse_url((string) env('REDIS_HOST'), PHP_URL_HOST) ?: env('REDIS_HOST'),
+                    (int) (env('REDIS_PORT') ?: 6379),
                 ],
             ],
         ],
diff --git a/src/Probe/TcpPingProbe.php b/src/Probe/TcpPingProbe.php
index 7b512bb..c979458 100644
--- a/src/Probe/TcpPingProbe.php
+++ b/src/Probe/TcpPingProbe.php
@@ -10,13 +10,23 @@
 class TcpPingProbe implements ProbeInterface
 {
     public function __construct(
-        private readonly string $host,
+        private readonly ?string $host,
         private readonly int $port,
         private readonly float $timeout = 3.0,
     ) {}
 
     public function probe(): ProbeResult
     {
+        if ($this->host === null || $this->host === '') {
+            return new ProbeResult(
+                connectMs: 0,
+                requestMs: 0,
+                totalMs: 0,
+                success: false,
+                error: 'TCP connect failed: no host configured',
+            );
+        }
+
         $start = hrtime(true);
 
         $errno = 0;
diff --git a/tests/Laravel/AuthorizeTokenTest.php b/tests/Laravel/AuthorizeTokenTest.php
index 0e4c7dc..7910a37 100644
--- a/tests/Laravel/AuthorizeTokenTest.php
+++ b/tests/Laravel/AuthorizeTokenTest.php
@@ -105,6 +105,13 @@
         ->assertForbidden();
 });
 
+test('array token query param is rejected instead of erroring', function () {
+    config(['netwatch.health_route.token' => 'secret-token']);
+
+    $this->get('/netwatch/health?token[]=secret-token', ['Accept' => 'application/json'])
+        ->assertForbidden();
+});
+
 test('token not configured ignores query param and uses regular auth', function () {
     config(['netwatch.health_route.token' => null]);
 
diff --git a/tests/Probe/TcpPingProbeTest.php b/tests/Probe/TcpPingProbeTest.php
index 07d3bff..b54381a 100644
--- a/tests/Probe/TcpPingProbeTest.php
+++ b/tests/Probe/TcpPingProbeTest.php
@@ -9,6 +9,22 @@
     expect($probe->name())->toBe('tcp://example.com:443');
 });
 
+test('probe fails gracefully when host is null', function () {
+    $probe = new TcpPingProbe(null, 3306);
+    $result = $probe->probe();
+
+    expect($result->success)->toBeFalse()
+        ->and($result->error)->toBe('TCP connect failed: no host configured');
+});
+
+test('probe fails gracefully when host is empty', function () {
+    $probe = new TcpPingProbe('', 6379);
+    $result = $probe->probe();
+
+    expect($result->success)->toBeFalse()
+        ->and($result->error)->toBe('TCP connect failed: no host configured');
+});
+
 test('probe fails on unreachable host', function () {
     $probe = new TcpPingProbe('192.0.2.1', 9999, timeout: 0.5);
     $result = $probe->probe();