Some refactoring regarding ports.

src/Squidex/Config/Orleans/OrleansServices.cs

@@ -54,13 +54,14 @@ namespace Squidex.Config.Orleans
                     builder.AddMyParts();
                 });
 
+            var gatewayPort = config.GetOptionalValue("orleans:gatewayPort", 40000);
+
+            var siloPort = config.GetOptionalValue("orleans:siloPort", 11111);
+
             config.ConfigureByOption("orleans:clustering", new Options
             {
                 ["MongoDB"] = () =>
                 {
-                    int siloPort = int.TryParse(config.GetRequiredValue("orleans:siloPort"), out siloPort) ? siloPort : 11111;
-                    int gatewayPort = int.TryParse(config.GetRequiredValue("orleans:gatewayPort"), out gatewayPort) ? gatewayPort : 40000;
-
                     hostBuilder.ConfigureEndpoints(Dns.GetHostName(), siloPort, gatewayPort, listenOnAnyHostAddress: true);
 
                     var mongoConfiguration = config.GetRequiredValue("store:mongoDb:configuration");
@@ -75,7 +76,7 @@ namespace Squidex.Config.Orleans
                 },
                 ["Development"] = () =>
                 {
-                    hostBuilder.UseLocalhostClustering(gatewayPort: 40000, serviceId: Constants.OrleansClusterId, clusterId: Constants.OrleansClusterId);
+                    hostBuilder.UseLocalhostClustering(siloPort, gatewayPort, null, Constants.OrleansClusterId, Constants.OrleansClusterId);
                     hostBuilder.Configure<ClusterMembershipOptions>(options => options.ExpectedClusterSize = 1);
                 }
             });

src/Squidex/Config/ServiceExtensions.cs

@@ -6,6 +6,7 @@
 // ==========================================================================
 
 using System;
+using System.Globalization;
 using System.Linq;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -96,6 +97,19 @@ namespace Squidex.Config
             return value;
         }
 
+        public static int GetOptionalValue(this IConfiguration config, string path, int defaultValue)
+        {
+            var value = config.GetValue<string>(path);
+            var result = defaultValue;
+
+            if (string.IsNullOrWhiteSpace(value) || !int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out result))
+            {
+                result = defaultValue;
+            }
+
+            return result;
+        }
+
         public static string GetRequiredValue(this IConfiguration config, string path)
         {
             var value = config.GetValue<string>(path);

src/Squidex/appsettings.json

@@ -179,10 +179,12 @@
      */
     "clustering": "MongoDb",
     /*
-     * The ports used to host the Orleans silo and the Gateway to connect to it
+     * The port is used to share messages between all cluster members. Must be accessible within your cluster or network.
-     * optional: defaults to 11111 (silo) and 40000 (gateway) when not provided
      */
     "siloPort": "11111",
+    /*
+     * The ports used by Orleans to connect to external clients. Not used.
+     */
     "gatewayPort": "40000"
   },