malcolm: Configure firewall and wordpress

hosts/malcolm/configuration.nix

@@ -6,6 +6,10 @@
 
     ../../base.nix
     ../../common/metrics-exporters.nix
+
+    ./services/mysql.nix
+    ./services/nginx.nix
+    ./services/www-kinealbrigtsen-no.nix
   ];
 
   networking = {
@@ -18,8 +22,26 @@
 
     hostId = "620c42d0";
     defaultGateway = "192.168.11.1";
+
+    # Prepend the following output rules to disallow talking to other devices on LAN
+    firewall.extraCommands = lib.strings.concatLines ([
+      "iptables -F OUTPUT"
+    ] ++ (map (addr: "iptables -A OUTPUT -p udp --dport 53 -d ${addr} -j nixos-fw-accept") config.networking.nameservers) ++ [ # Exception for DNS
+      "iptables -A OUTPUT -p tcp --dport 3100 -d 192.168.10.175 -j nixos-fw-accept" # Exception for loki logging
+      "iptables -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"
+      "iptables -A OUTPUT -d 192.168.10.0/24 -j nixos-fw-refuse"
+      "iptables -A OUTPUT -d 192.168.11.0/24 -j nixos-fw-refuse"
+    ]);
   };
 
+  # virtualisation.oci-containers.backend = "docker";
+  # systemd.services.docker.postStart = lib.concatMapStringsSep "\n" (rule: "${pkgs.iptables}/bin/iptables ${rule}") ([
+  #   "-F DOCKER-USER"
+  # ] ++ (map (addr: "-A DOCKER-USER -p udp --dport 53 -d ${addr} -j RETURN") config.networking.nameservers) ++ [
+  #   "-A DOCKER-USER -d 192.168.10.0/24 -j REJECT"
+  #   "-A DOCKER-USER -d 192.168.11.0/24 -j REJECT"
+  #   "-A DOCKER-USER -j RETURN"
+  # ]);
 
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system.stateVersion = "24.05";
 }

hosts/malcolm/services/mysql.nix

@@ -0,0 +1,10 @@
+{ config, pkgs, lib, ... }:
+
+{
+  services.mysql = {
+    enable = true;
+    package = pkgs.mariadb;
+  };
+
+  # TODO: services.mysqlBackup
+}

hosts/malcolm/services/nginx.nix

@@ -0,0 +1,15 @@
+{ config, values, ... }:
+{
+  services.nginx = {
+    enable = true;
+
+    clientMaxBodySize = "100m";
+
+    recommendedProxySettings = true;
+    recommendedTlsSettings = true;
+    recommendedGzipSettings = true;
+    recommendedOptimisation = true;
+  };
+
+  networking.firewall.allowedTCPPorts = [ 80 443 ];
+}

hosts/malcolm/services/www-kinealbrigtsen-no.nix

@@ -0,0 +1,96 @@
+{ config, pkgs, lib, ... }:
+
+{
+  users.users.www-kinealbrigtsen-no = {
+    isSystemUser = true;
+    group = "www-kinealbrigtsen-no";
+  };
+
+  users.groups.www-kinealbrigtsen-no = { };
+
+  services.mysql.ensureDatabases = [
+    "www_kinealbrigtsen_no"
+  ];
+  services.mysql.ensureUsers = [
+    {
+      name = "www-kinealbrigtsen-no";
+      ensurePermissions = {
+        # "www_kinealbrigtsen_no.*" = "ALL PRIVILEGES"; # For upgrades and special procedures
+        "www_kinealbrigtsen_no.*" = "SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER, INDEX";
+      };
+    }
+  ];
+
+  services.phpfpm.pools.www-kinealbrigtsen-no = {
+    user = "www-kinealbrigtsen-no";
+    group = "www-kinealbrigtsen-no";
+    phpOptions = lib.generators.toKeyValue {} {
+      upload_max_filesize = "1000M";
+      post_max_size = "1000M";
+      memory_limit = "1000M";
+    };
+
+    settings = {
+      "listen.owner" = config.services.nginx.user;
+      "listen.group" = config.services.nginx.group;
+      "pm" = "dynamic";
+      "pm.max_children" = 32;
+      "pm.start_servers" = 2;
+      "pm.min_spare_servers" = 2;
+      "pm.max_spare_servers" = 4;
+      "pm.process_idle_timeout" = "10s";
+      "pm.max_requests" = 1000;
+    };
+  };
+
+  services.nginx.virtualHosts."kinealbrigtsen.no" = {
+    serverAliases = [ "www.kinealbrigtsen.no" ];
+    root = "/var/www/www-kinealbrigtsen-no";
+    locations = {
+      "/".extraConfig = ''
+        try_files $uri $uri/ /index.php?$args;
+      '';
+
+      "~ \\.php$".extraConfig = ''
+        include ${config.services.nginx.package}/conf/fastcgi_params;
+
+        fastcgi_param   SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_pass unix:${config.services.phpfpm.pools.www-kinealbrigtsen-no.socket};
+      '';
+
+      "~ /\\.ht".extraConfig = ''
+        deny all;
+      '';
+
+      "/favicon.ico".extraConfig = ''
+        log_not_found off;
+        access_log off;
+      '';
+
+      "/robots.txt".extraConfig = ''
+        allow all;
+        log_not_found off;
+        access_log off;
+      '';
+
+      "~* \\.(js|css|png|jpg|jpeg|gif|ico)$".extraConfig =  ''
+        expires max;
+        log_not_found off;
+      '';
+    };
+    extraConfig = ''
+      index index.php index.html;
+      set_real_ip_from 192.168.11.0/24;
+      real_ip_header X-Forwarded-For;
+
+      add_header Content-Security-Policy "script-src 'self'; object-src 'none'; base-uri 'none';" always;
+      add_header 'Referrer-Policy' 'origin-when-cross-origin';
+      add_header X-Frame-Options DENY;
+      add_header X-Content-Type-Options nosniff;
+    '';
+  };
+
+  # TODO:
+  # - Configure a mailer so wp_mail() works
+  # - Enable periodic backups
+}