diff --git a/machine/backyard/default.nix b/machine/backyard/default.nix
index 0eb9eed..4be8480 100644
--- a/machine/backyard/default.nix
+++ b/machine/backyard/default.nix
@@ -3,6 +3,7 @@
 {
   imports = [
     ./hardware-configuration.nix
+    ./fileserver.nix
     ./jellyfin.nix
     ./samba.nix
   ];
@@ -29,6 +30,7 @@
     allowedTCPPorts = [
       7474  # mirror revproxy
       7475  # http serve tvb pool
+      7476  # tvb catacomb host server
     ];
   };
 
@@ -60,6 +62,13 @@
         ];
         root = "/pool/tvb/doc/website/mirror";
       };
+      "files.backyard.home" = {
+        listen = [
+          { addr = "10.22.20.8"; port = 7476; }
+        ];
+        locations."/".tryFiles = "\$uri @indexer";
+        locations."@indexer".proxyPass = "http://localhost:5000";
+      };
     };
   };
 
diff --git a/machine/backyard/fileserver.nix b/machine/backyard/fileserver.nix
new file mode 100644
index 0000000..adbe69c
--- /dev/null
+++ b/machine/backyard/fileserver.nix
@@ -0,0 +1,47 @@
+# nas indexer server module
+{ pkgs, ... }:
+
+let
+  # Build the catacomb server package
+  catacombServerSource = builtins.fetchGit {
+    url = "https://git.alogoulogoi.com/Jaculabilis/catacomb-server.git";
+    ref = "develop-nix";
+    rev = "3d6fb16948c377f94d030648849f120c8ada3884";
+  };
+  catacombServer = pkgs.callPackage catacombServerSource {
+    pkgs = import (fetchTarball {
+      url = "https://github.com/NixOS/nixpkgs/archive/405d762a1a05ffed2ac820eb4bae4bc49bc3abf2.tar.gz";
+      sha256 = "6c835ea038bdfe170029a8bd4276c9d3a95c275159ec05426672fa8092c7947d";
+    }) {
+      system = "x86_64-linux";
+    };
+  };
+
+  # Host-mode server run script
+  hostRun = pkgs.writeShellScriptBin "catacomb-run-host.sh" ''
+    ${catacombServer}/bin/gunicorn \
+      --bind=localhost:5000 \
+      --workers=3 \
+      --log-level=debug \
+      --env CATACOMB_ROOT=/pool/tvb \
+      --env CATACOMB_MODE=host \
+      --env CATACOMB_TOKENS=/var/empty \
+      --env CATACOMB_GUEST_HOST=catacomb.alogoulogoi.com \
+      "catacomb.server:wsgi()"
+  '';
+in
+{
+  # Set up the host mode service
+  systemd.services."catacomb-host" = {
+    enable = true;
+    description = "catapool host-mode index server";
+    script = "${hostRun}/bin/catacomb-run-host.sh";
+    serviceConfig = {
+      Type = "simple";
+      User = "nginx";
+    };
+    requires = [ "zfs.target" ];
+    wantedBy = [ "multi-user.target" ];
+    after = [ "network.target" ];
+  };
+}