Enable Snowflake proxy with capacity 50

Reassign multiple service frontends from 81xx to 80xx ports (Forgejo,
ntopng, AdGuard, Scrutiny, Paperless, Whats Up Docker, etc.) and update
homepage links.

Configure ACME (webroot) and add certs for kempinger.at,
webadmin.kempinger.at,
and bilder.kempinger.at; update nginx virtual hosts to use ACME hosts
and
serve the ACME challenge path.

Add users stalwart-mail and nginx to the acme group and open
SMTP-related
firewall ports (25, 587) plus mail UI ports (8090, 8091).

Add and configure the Stalwart mail service (SMTP, submissions, IMAP,
JMAP)
and adjust related service ports/settings (ntopng, scrutiny, influxdb,
WUD).

heimserver/configuration.nix

@@ -20,20 +20,22 @@
   time.timeZone = "Europe/Vienna";
 
   # Bootloader and kernel
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  boot.kernelParams = [
+  boot = {
+    loader.systemd-boot.enable = true;
+    loader.efi.canTouchEfiVariables = true;
+    kernelParams = [
       "vga=791"
       "nomodeset"
     ];
-  boot.kernel.sysctl = {
+    kernel.sysctl = {
       "net.ipv4.ip_forward" = 1;
       # "net.bridge.bridge-nf-call-iptables" = 1;
       # "net.bridge.bridge-nf-call-ip6tables" = 1;
     };
 
-  boot.supportedFilesystems = [ "zfs" ];
-  boot.zfs.forceImportRoot = false;
+    supportedFilesystems = [ "zfs" ];
+    zfs.forceImportRoot = false;
+  };
 
   hardware.graphics.enable = true;
   hardware.nvidia.open = true;
@@ -46,8 +48,6 @@
     keyMap = "de";
     # useXkbConfig = true; # use xkb.options in tty.
   };
-  # i18n.defaultLocale = "en_US.UTF-8";
-
   # Networking
   networking = {
     hostName = "heimserver";
@@ -60,15 +60,17 @@
       }
     ];
     defaultGateway = "192.168.69.1";
-    #nameservers = [ "1.1.1.1" ];
+    #nameservers = [ "127.0.0.1" ];
     firewall.enable = true;
     firewall.allowedTCPPorts = [
       22
+      25
       53
       80
       443
+      587
       2222 # forgejo ssh
-      8184 # forgejo frontend
+      8084 # forgejo frontend
       8123 # homeassistant
       5580 # homeassistant matter
       2283 # immich
@@ -78,11 +80,13 @@
       8554 # frigate rtsp
       8555 # frigate rtsp
       2055 # ntopng sink
-      8182 # ntopng frontend
-      8183 # adguardhome frontend
-      8185 # scrutiny frontend
-      8186 # wud frontend
-      8187 # paperless frontend
+      8088 # ntopng frontend
+      8083 # adguardhome frontend
+      8085 # scrutiny frontend
+      8089 # wud frontend
+      8087 # paperless frontend
+      8090 # mail
+      8091 # mail jmap
       8080 # homepage
     ];
     firewall.allowedUDPPorts = [
@@ -99,6 +103,14 @@
     ];
   };
   
+  users.users."stalwart-mail".extraGroups = [
+      "acme"
+    ];
+  
+  users.users."nginx".extraGroups = [
+      "acme"
+    ];
+
   users.users.immich.extraGroups = [
     "video"
     "render"
@@ -143,7 +155,30 @@
   security.acme = {
     acceptTerms = true;
     defaults.email = "mail@kempinger.xyz";
-    certs."kempinger.at".domain = "*.kempinger.at";
+    defaults.webroot = "/var/lib/acme/acme-challenge/";
+    certs."kempinger.at" = {
+      domain = "kempinger.at";
+      extraDomainNames = [
+        "git.kempinger.at"
+      ];
+      reloadServices = [
+        "nginx"
+      ];
+    };
+    certs."webadmin.kempinger.at" = {
+      domain = "webadmin.kempinger.at";
+      extraDomainNames = [
+        "mta-sts.kempinger.at"
+        "autoconfig.kempinger.at"
+        "autodiscover.kempinger.at"
+        "mail.kempinger.at"
+        "imap.kempinger.at"
+        "mx1.kempinger.at"
+      ];
+    };
+    certs."bilder.kempinger.at" = {
+      domain = "bilder.kempinger.at";
+    };
   };
 
   #services.resolved.enable = true;
@@ -163,15 +198,30 @@
     };
     virtualHosts."kempinger.at" = {
       root = "/srv/website/public_html";
-      locations."/" = {
-        index = "index.html";
-      };
+      locations."/".index = "index.html";
       forceSSL = true;
-      enableACME = true;
+      useACMEHost = "kempinger.at";
+      locations."/.well-known/".root = "/var/lib/acme/acme-challenge/";
+    };
+    virtualHosts."webadmin.kempinger.at" = {
+      forceSSL = true;
+      useACMEHost = "webadmin.kempinger.at";
+      #acmeRoot = null;
+      serverAliases = [
+        "mta-sts.kempinger.at"
+        "autoconfig.kempinger.at"
+        "autodiscover.kempinger.at"
+        "mail.kempinger.at"
+        "imap.kempinger.at"
+        "mx1.kempinger.at"
+      ];
+      locations."/" = {
+        proxyPass = "http://127.0.0.1:8090";
+      };
     };
     virtualHosts.${config.services.forgejo.settings.server.DOMAIN} = {
       forceSSL = true;
-      enableACME = true;
+      useACMEHost = "kempinger.at";
       extraConfig = ''
         client_max_body_size 512M;
       '';
@@ -179,8 +229,8 @@
         "http://localhost:${toString config.services.forgejo.settings.server.HTTP_PORT}";
     };
     virtualHosts."bilder.kempinger.at" = {
-      enableACME = true;
       forceSSL = true;
+      useACMEHost = "bilder.kempinger.at";
       locations."/" = {
         proxyPass = "http://[::1]:${toString config.services.immich.port}";
         proxyWebsockets = true;
@@ -205,7 +255,7 @@
         DOMAIN = "git.kempinger.at";
         # You need to specify this to remove the port from URLs in the web UI.
         ROOT_URL = "https://${config.services.forgejo.settings.server.DOMAIN}/";
-        HTTP_PORT = 8184;
+        HTTP_PORT = 8084;
         DISABLE_SSH = false;
         SSH_PORT = 2222;
         START_SSH_SERVER = true;
@@ -347,8 +397,6 @@
     };
   };
 
-  #services.matter-server.enable = true;
-
   virtualisation.oci-containers = {
     backend = "podman";
     containers.homeassistant = {
@@ -440,7 +488,7 @@
         "/var/run/podman/podman.sock:/var/run/docker.sock"
       ];
       environment = {
-        WUD_SERVER_PORT = "8186";
+        WUD_SERVER_PORT = "8089";
         WUD_TRIGGER_COMMAND_LOCAL_CMD = "echo \${display_name} can be updated to \${update_kind_remote_value}";
       };
       extraOptions = [
@@ -451,7 +499,7 @@
 
   services.ntopng = {
     enable = true;
-    httpPort = 8182;
+    httpPort = 8088;
     interfaces = [ "tcp://0.0.0.0:5556" ];
     extraConfig = ''
       --dns-mode 1
@@ -460,6 +508,9 @@
 
   services.influxdb2 = {
     enable = true;
+    settings = {
+      http-bind-address = ":8086";
+    };
 
     # provision = {
     #   enable = true;
@@ -490,7 +541,7 @@
 
   services.scrutiny = {
     enable = true;
-    settings.web.listen.port = 8185;
+    settings.web.listen.port = 8085;
     influxdb.enable = true;
     collector.schedule = "hourly";
     settings.web.influxdb = {
@@ -504,14 +555,14 @@
     enable = true;
     # You can select any ip and port, just make sure to open firewalls where needed
     host = "0.0.0.0";
-    port = 8183;
+    port = 8083;
   };
 
   services.paperless = {
     enable = true;
     consumptionDirIsPublic = true;
     address = "0.0.0.0";
-    port = 8187;
+    port = 8087;
     settings = {
       PAPERLESS_CONSUMER_IGNORE_PATTERN = [
         ".DS_STORE/*"
@@ -525,7 +576,6 @@
     };
   };
 
-
   services.homepage-dashboard = {
     enable = true;
     listenPort = 8080;
@@ -628,7 +678,7 @@
               icon = "forgejo.png";
               widget = {
                 type = "gitea"; # Forgejo uses Gitea API
-                url = "http://192.168.69.69:8184";
+                url = "http://192.168.69.69:8084";
                 key = "{{HOMEPAGE_VAR_FORGEJO_TOKEN}}"; # Create in Forgejo settings
                 # Shows: repository count, issue count, pull requests
               };
@@ -640,12 +690,12 @@
         "Network & Monitoring" = [
           {
             "AdGuard Home" = {
-              href = "http://192.168.69.69:8183";
+              href = "http://192.168.69.69:8083";
               description = "DNS filtering & ad blocking";
               icon = "adguard-home.png";
               widget = {
                 type = "adguard";
-                url = "http://192.168.69.69:8183";
+                url = "http://192.168.69.69:8083";
                 username = "{{HOMEPAGE_VAR_ADGUARD_USER}}";
                 password = "{{HOMEPAGE_VAR_ADGUARD_PASS}}";
                 # Shows: queries blocked, % blocked, queries processed
@@ -667,29 +717,29 @@
           }
           {
             "Scrutiny" = {
-              href = "http://192.168.69.69:8185";
+              href = "http://192.168.69.69:8085";
               description = "S.M.A.R.T Monitoring";
               icon = "scrutiny.png";
               widget = {
                 type = "scrutiny";
-                url = "http://192.168.69.69:8185";
+                url = "http://192.168.69.69:8085";
               };
             };
           }
           {
             "Whats Up Docker" = {
-              href = "http://192.168.69.69:8186";
+              href = "http://192.168.69.69:8089";
               description = "Docker Image Updates";
               icon = "whats-up-docker.png";
               widget = {
                 type = "whatsupdocker";
-                url = "http://192.168.69.69:8186";
+                url = "http://192.168.69.69:8089";
               };
             };
           }
           {
             "ntopng" = {
-              href = "http://192.168.69.69:8182";
+              href = "http://192.168.69.69:8088";
               description = "Network traffic analysis";
               icon = "ntopng.png";
               # No official widget, but could use iframe or custom API
@@ -787,6 +837,69 @@
     environmentFile = "/var/lib/homepage-dashboard/secrets.env";
   };
 
+  services.stalwart = {
+    enable = true;
+    openFirewall = true;
+    settings = {
+      server = {
+        hostname = "mx1.kempinger.at";
+        tls = {
+          enable = true;
+          implicit = true;
+        };
+        listener = {
+          smtp = {
+            protocol = "smtp";
+            bind = "192.168.69.69:25";
+          };
+          submissions = {
+            bind = "192.168.69.69:587";
+            protocol = "smtp";
+            tls.implicit = true;
+          };
+          imaps = {
+            bind = "[::]:993";
+            protocol = "imap";
+            tls.implicit = true;
+          };
+          jmap = {
+            bind = "0.0.0.0:8091";
+            url = "https://mail.kempinger.at";
+            protocol = "http";
+          };
+          management = {
+            bind = [ "127.0.0.1:8090" ];
+            protocol = "http";
+          };
+        };
+      };
+      resolver.type = "custom";
+      resolver.custom = [ "udp://127.0.0.1:53" ];
+
+      certificate."default" = {
+        cert = "%{file:${config.security.acme.certs."webadmin.kempinger.at".directory}/fullchain.pem}%";
+        private-key = "%{file:${config.security.acme.certs."webadmin.kempinger.at".directory}/key.pem}%";
+      };
+      
+      lookup.default = {
+        hostname = "mx1.kempinger.at";
+        domain = "kempinger.at";
+      };
+
+      session.rcpt.directory = "'internal'";
+      directory."imap".lookup.domains = [ "kempinger.at" ];
+      # authentication.fallback-admin = {
+      #   user = "admin";
+      #   secret = "bcrypt-hash";
+      # };
+    };
+  };
+  
+  services.snowflake-proxy = {
+    enable = true;
+    capacity = 50;
+  };
+
   nixpkgs.config.allowUnfree = true;
 
   # nixpkgs.overlays = [