1 files changed, 55 insertions, 5 deletions
diff --git a/nixos/modules/services/misc/jellyfin.nix b/nixos/modules/services/misc/jellyfin.nix
index 0493dadea94..6d64acc0291 100644
--- a/nixos/modules/services/misc/jellyfin.nix
+++ b/nixos/modules/services/misc/jellyfin.nix
@@ -18,6 +18,7 @@ in
 
       package = mkOption {
         type = types.package;
+        default = pkgs.jellyfin;
         example = literalExample "pkgs.jellyfin";
         description = ''
           Jellyfin package to use.
@@ -29,6 +30,16 @@ in
         default = "jellyfin";
         description = "Group under which jellyfin runs.";
       };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Open the default ports in the firewall for the media server. The
+          HTTP/HTTPS ports can be changed in the Web UI, so this option should
+          only be used if they are unchanged.
+        '';
+      };
     };
   };
 
@@ -45,14 +56,47 @@ in
         CacheDirectory = "jellyfin";
         ExecStart = "${cfg.package}/bin/jellyfin --datadir '/var/lib/${StateDirectory}' --cachedir '/var/cache/${CacheDirectory}'";
         Restart = "on-failure";
+
+        # Security options:
+
+        NoNewPrivileges = true;
+
+        AmbientCapabilities = "";
+        CapabilityBoundingSet = "";
+
+        # ProtectClock= adds DeviceAllow=char-rtc r
+        DeviceAllow = "";
+
+        LockPersonality = true;
+
+        PrivateTmp = true;
+        PrivateDevices = true;
+        PrivateUsers = true;
+
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+
+        RemoveIPC = true;
+
+        RestrictNamespaces = true;
+        # AF_NETLINK needed because Jellyfin monitors the network connection
+        RestrictAddressFamilies = [ "AF_NETLINK" "AF_INET" "AF_INET6" ];
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+
+        SystemCallArchitectures = "native";
+        SystemCallErrorNumber = "EPERM";
+        SystemCallFilter = [
+          "@system-service"
+          "~@cpu-emulation" "~@debug" "~@keyring" "~@memlock" "~@obsolete" "~@privileged" "~@setuid"
+        ];
       };
     };
 
-    services.jellyfin.package = mkDefault (
-      if versionAtLeast config.system.stateVersion "20.09" then pkgs.jellyfin
-        else pkgs.jellyfin_10_5
-    );
-
     users.users = mkIf (cfg.user == "jellyfin") {
       jellyfin = {
         group = cfg.group;
@@ -64,6 +108,12 @@ in
       jellyfin = {};
     };
 
+    networking.firewall = mkIf cfg.openFirewall {
+      # from https://jellyfin.org/docs/general/networking/index.html
+      allowedTCPPorts = [ 8096 8920 ];
+      allowedUDPPorts = [ 1900 7359 ];
+    };
+
   };
 
   meta.maintainers = with lib.maintainers; [ minijackson ];