nixos/nodes/knazarovcom/configuration.nix

{ config, pkgs, ... }:

{
  imports = [ ./hardware-configuration.nix ];

  boot.loader.grub.enable = true;
  networking.hostName = "knazarovcom";
  boot.loader.grub.device = "/dev/vda";

  users.users.knazarov = {
    isNormalUser = true;
    extraGroups = [ "wheel" ];
    openssh.authorizedKeys.keys = [
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIJkgpPDojl4RtsuFLIsHkH/19s3trYljdn/Jmbb3FCHNAAAABHNzaDo= knazarov@framework"
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIO7W7yDKxAj9u1hu3zsZMJW+0HUnA/C/rkbuzkQantkaAAAABHNzaDo= knazarov@mira"
    ];
  };

  environment.systemPackages = with pkgs; [ vim sops goaccess ];

  services.openssh.enable = true;
  services.openssh.settings = {
    PermitRootLogin = "no";
    PasswordAuthentication = false;
  };

  security.pam.enableSSHAgentAuth = true;
  security.pam.sshAgentAuth.enable = true;
  security.sudo.wheelNeedsPassword = false;
  nix.settings.trusted-users = [ "@wheel" ];

  users.users.nginx.extraGroups = [ "turnserver" ];

  # Good list of bots: https://www.sci.news/robots.txt
  services.nginx = {
    enable = true;
    clientMaxBodySize = "1024m";
    commonHttpConfig = ''
      map $http_user_agent $limit_bots {
        default 0;
        ~*(AhrefsBot|PetalBot|bingbot|gptbot|ZoominfoBot|BLEXBot|Bytespider) 1;
        ~*(DecompilationBot|Amazonbot|Barkrowler|SeznamBot|SemrushBot) 1;
        ~*(MJ12bot|IonCrawl|webprosbot|Sogou|paloaltonetworks|CensysInspect) 1;
        ~*(DotBot|ev-crawler|InternetMeasurement|CheckMarkNetwork|panscient) 1;
        ~*(gdnplus|PunkMap|pdrlabs|SurdotlyBot|researchscan|serpstatbot) 1;
        ~*(MegaIndex|DongleEmulatorBot|TinyTestBot|meta-externalagent) 1;
      }
    '';
    virtualHosts = {
      "www.knazarov.com" = {
        enableACME = true;
        forceSSL = true;
        globalRedirect = "knazarov.com";
      };
      "knazarov.com" = {
        enableACME = true;
        forceSSL = true;
        root = "${pkgs.knazarovcom}/srv/knazarov.com";

        locations."/.well-known/matrix/server" = {
          extraConfig = ''
            default_type application/json;
            return 200 '{ "m.server": "matrix.knazarov.com:443" }';
          '';
        };
        locations."/.well-known/matrix/client" = {
          extraConfig = ''
            default_type application/json;
            return 200 '{ "m.homeserver": { "base_url": "https://matrix.knazarov.com" }, "org.matrix.msc3575.proxy": { "url": "https://syncv3.knazarov.com" } }';
            add_header "Access-Control-Allow-Origin" *;
          '';
        };
        locations."/" = {
          extraConfig = ''
            if ($limit_bots = 1) {
              return 403;
            }
          '';
        };
      };
      "vmatveeva.com" = {
        enableACME = true;
        forceSSL = true;
        root = "${pkgs.vmatveevacom}/srv/vmatveeva.com";
        locations."/" = {
          extraConfig = ''
            if ($limit_bots = 1) {
              return 403;
            }
          '';
        };
      };
      "matrix.knazarov.com" = {
        enableACME = true;
        forceSSL = true;
        locations."/_matrix" = { proxyPass = "http://127.0.0.1:8008"; };
      };
      "syncv3.knazarov.com" = {
        enableACME = true;
        forceSSL = true;
        locations."/_matrix/client/unstable/org.matrix.msc3575/sync" = {
          proxyPass = "http://127.0.0.1:8009";
          extraConfig = ''
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header Host $host;
          '';
        };

        locations."/client/" = {
          proxyPass = "http://127.0.0.1:8009";
          extraConfig = ''
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header Host $host;
          '';
        };
      };
      "git.knazarov.com" = {
        enableACME = true;
        forceSSL = true;
        locations."/" = { proxyPass = "http://127.0.0.1:3000"; };
      };
      "turn.knazarov.com" = { enableACME = true; };
    };
  };
  security.acme.acceptTerms = true;
  security.acme.certs = {
    "www.knazarov.com".email = "mail@knazarov.com";
    "knazarov.com".email = "mail@knazarov.com";
    "vmatveeva.com".email = "mail@knazarov.com";
    "matrix.knazarov.com".email = "mail@knazarov.com";
    "syncv3.knazarov.com".email = "mail@knazarov.com";
    "git.knazarov.com".email = "mail@knazarov.com";
    "turn.knazarov.com" = {
      email = "mail@knazarov.com";
      postRun = "systemctl restart coturn.service";
      group = "turnserver";
    };
  };

  services.forgejo = {
    enable = true;
    package = pkgs.forgejo;
    settings = {
      service = { DISABLE_REGISTRATION = true; };
      server = {
        ROOT_URL = "https://git.knazarov.com/";
        LANDING_PAGE = "explore";
      };
      federation = {
        ENABLED = "true";

      };
    };
  };

  services.matrix-sliding-sync = {
    enable = true;
    environmentFile = config.sops.secrets.matrix_sliding_sync.path;
    settings = { SYNCV3_SERVER = "https://matrix.knazarov.com"; };
  };

  services.dendrite = {
    enable = true;
    environmentFile = config.sops.secrets.matrix_registration_secret.path;
    settings = {
      global = {
        server_name = "knazarov.com";
        private_key = config.sops.secrets.matrix_key.path;
        jetstream = { storage_path = "/var/lib/dendrite/nats"; };
      };
      client_api.registration_shared_secret = "$REGISTRATION_SHARED_SECRET";
      client_api.turn = {
        turn_user_lifetime = "5m";
        turn_uris = [
          "turn:${config.services.coturn.realm}:3478?transport=udp"
          "turn:${config.services.coturn.realm}:3478?transport=tcp"
        ];
        turn_shared_secret = "$COTURN_AUTH_SECRET";
      };
    };
  };

  systemd.services.dendrite = {
    serviceConfig.SupplementaryGroups = [ config.users.groups.keys.name ];
  };

  services.coturn = rec {
    enable = true;
    no-cli = true;
    no-tcp-relay = true;
    min-port = 49000;
    max-port = 50000;
    use-auth-secret = true;
    static-auth-secret-file = config.sops.secrets.coturn_auth_secret.path;
    realm = "turn.knazarov.com";
    cert = "${config.security.acme.certs.${realm}.directory}/full.pem";
    pkey = "${config.security.acme.certs.${realm}.directory}/key.pem";
    extraConfig = ''
      # for debugging
      verbose
    '';
  };

  sops.defaultSopsFile = ./secrets.yaml;
  sops.secrets = {
    example_key = { };
    matrix_key = {
      mode = "0440";
      group = config.users.groups.keys.name;
    };
    matrix_sliding_sync = {
      mode = "0440";
      group = config.users.groups.keys.name;
    };
    matrix_registration_secret = {
      mode = "0440";
      group = config.users.groups.keys.name;
    };
    coturn_auth_secret = {
      mode = "0440";
      group = config.users.groups.turnserver.name;
    };
  };

  networking.firewall = {
    allowedTCPPorts = [
      80
      443
      3478
      5349 # coturn
    ];
    allowedUDPPorts = [
      3478
      5349 # coturn
    ];
    allowedUDPPortRanges = [{
      from = config.services.coturn.min-port;
      to = config.services.coturn.max-port;
    }];
  };
  # networking.firewall.allowedUDPPorts = [ ... ];

  system.stateVersion = "23.05";
}