diff --git a/nixos/doc/manual/release-notes/rl-2405.section.md b/nixos/doc/manual/release-notes/rl-2405.section.md
index 72389518b1ea..0905337de94d 100644
--- a/nixos/doc/manual/release-notes/rl-2405.section.md
+++ b/nixos/doc/manual/release-notes/rl-2405.section.md
@@ -377,6 +377,9 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
 
 - [Nginx virtual hosts](#opt-services.nginx.virtualHosts) using `forceSSL` or
   `globalRedirect` can now have redirect codes other than 301 through
+
+- `bacula` now allows to configure `TLS` for encrypted communication.
+
   `redirectCode`.
 
 - `libjxl` 0.9.0 [dropped support for the butteraugli API](https://github.com/libjxl/libjxl/pull/2576). You will no longer be able to set `enableButteraugli` on `libaom`.
diff --git a/nixos/modules/services/backup/bacula.nix b/nixos/modules/services/backup/bacula.nix
index 5a75a46e5259..39975adf5909 100644
--- a/nixos/modules/services/backup/bacula.nix
+++ b/nixos/modules/services/backup/bacula.nix
@@ -4,11 +4,36 @@
 # TODO: test configuration when building nixexpr (use -t parameter)
 # TODO: support sqlite3 (it's deprecate?) and mysql
 
-with lib;
 
 let
+  inherit (lib)
+    concatStringsSep
+    literalExpression
+    mapAttrsToList
+    mdDoc
+    mkIf
+    mkOption
+    optional
+    optionalString
+    types
+    ;
   libDir = "/var/lib/bacula";
 
+  yes_no = bool: if bool then "yes" else "no";
+  tls_conf = tls_cfg: optionalString tls_cfg.enable (
+    concatStringsSep
+      "\n"
+      (
+      ["TLS Enable = yes;"]
+      ++ optional (tls_cfg.require != null) "TLS Require = ${yes_no tls_cfg.require};"
+      ++ optional (tls_cfg.certificate != null) ''TLS Certificate = "${tls_cfg.certificate}";''
+      ++ [''TLS Key = "${tls_cfg.key}";'']
+      ++ optional (tls_cfg.verifyPeer != null) "TLS Verify Peer = ${yes_no tls_cfg.verifyPeer};"
+      ++ optional (tls_cfg.allowedCN != [ ]) "TLS Allowed CN = ${concatStringsSep " " (tls_cfg.allowedCN)};"
+      ++ optional (tls_cfg.caCertificateFile != null) ''TLS CA Certificate File = "${tls_cfg.caCertificateFile}";''
+      )
+  );
+
   fd_cfg = config.services.bacula-fd;
   fd_conf = pkgs.writeText "bacula-fd.conf"
     ''
@@ -18,6 +43,7 @@ let
         WorkingDirectory = ${libDir};
         Pid Directory = /run;
         ${fd_cfg.extraClientConfig}
+        ${tls_conf fd_cfg.tls}
       }
 
       ${concatStringsSep "\n" (mapAttrsToList (name: value: ''
@@ -25,6 +51,7 @@ let
         Name = "${name}";
         Password = ${value.password};
         Monitor = ${value.monitor};
+        ${tls_conf value.tls}
       }
       '') fd_cfg.director)}
 
@@ -44,6 +71,7 @@ let
         WorkingDirectory = ${libDir};
         Pid Directory = /run;
         ${sd_cfg.extraStorageConfig}
+        ${tls_conf sd_cfg.tls}
       }
 
       ${concatStringsSep "\n" (mapAttrsToList (name: value: ''
@@ -70,6 +98,7 @@ let
         Name = "${name}";
         Password = ${value.password};
         Monitor = ${value.monitor};
+        ${tls_conf value.tls}
       }
       '') sd_cfg.director)}
 
@@ -90,6 +119,7 @@ let
       Working Directory = ${libDir};
       Pid Directory = /run/;
       QueryFile = ${pkgs.bacula}/etc/query.sql;
+      ${tls_conf dir_cfg.tls}
       ${dir_cfg.extraDirectorConfig}
     }
 
@@ -108,13 +138,99 @@ let
     ${dir_cfg.extraConfig}
     '';
 
-  directorOptions = {...}:
+  linkOption = name: destination: "[${name}](#opt-${builtins.replaceStrings [ "<" ">"] ["_" "_"] destination})";
+  tlsLink = destination: submodulePath: linkOption "${submodulePath}.${destination}" "${submodulePath}.${destination}";
+
+  tlsOptions = submodulePath: {...}:
+  {
+    options = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = mdDoc ''
+          Specifies if TLS should be enabled.
+          If this set to `false` TLS will be completely disabled, even if ${tlsLink "tls.require" submodulePath} is true.
+        '';
+      };
+      require = mkOption {
+        type = types.nullOr types.bool;
+        default = null;
+        description = mdDoc ''
+          Require TLS or TLS-PSK encryption.
+          This directive is ignored unless one of ${tlsLink "tls.enable" submodulePath} is true or TLS PSK Enable is set to `yes`.
+          If TLS is not required while TLS or TLS-PSK are enabled, then the Bacula component
+          will connect with other components either with or without TLS or TLS-PSK
+
+          If ${tlsLink "tls.enable" submodulePath} or TLS-PSK is enabled and TLS is required, then the Bacula
+          component will refuse any connection request that does not use TLS.
+        '';
+      };
+      certificate = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = mdDoc ''
+          The full path to the PEM encoded TLS certificate.
+          It will be used as either a client or server certificate,
+          depending on the connection direction.
+          This directive is required in a server context, but it may
+          not be specified in a client context if ${tlsLink "tls.verifyPeer" submodulePath} is
+          `false` in the corresponding server context.
+        '';
+      };
+      key = mkOption {
+        type = types.path;
+        description = mdDoc ''
+          The path of a PEM encoded TLS private key.
+          It must correspond to the TLS certificate.
+        '';
+      };
+      verifyPeer = mkOption {
+        type = types.nullOr types.bool;
+        default = null;
+        description = mdDoc ''
+          Verify peer certificate.
+          Instructs server to request and verify the client's X.509 certificate.
+          Any client certificate signed by a known-CA will be accepted.
+          Additionally, the client's X509 certificate Common Name must meet the value of the Address directive.
+          If ${tlsLink "tls.allowedCN" submodulePath} is used,
+          the client's x509 certificate Common Name must also correspond to
+          one of the CN specified in the ${tlsLink "tls.allowedCN" submodulePath} directive.
+          This directive is valid only for a server and not in client context.
+
+          Standard from Bacula is `true`.
+        '';
+      };
+      allowedCN = mkOption {
+        type = types.listOf types.str;
+        default = [ ];
+        description = mdDoc ''
+          Common name attribute of allowed peer certificates.
+          This directive is valid for a server and in a client context.
+          If this directive is specified, the peer certificate will be verified against this list.
+          In the case this directive is configured on a server side, the allowed
+          CN list will not be checked if ${tlsLink "tls.verifyPeer" submodulePath} is false.
+        '';
+      };
+      caCertificateFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = mdDoc ''
+          The path specifying a PEM encoded TLS CA certificate(s).
+          Multiple certificates are permitted in the file.
+          One of TLS CA Certificate File or TLS CA Certificate Dir are required in a server context, unless
+          ${tlsLink "tls.verifyPeer" submodulePath} is false, and are always required in a client context.
+        '';
+      };
+    };
+  };
+
+  directorOptions = submodulePath:{...}:
   {
     options = {
       password = mkOption {
         type = types.str;
         # TODO: required?
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Specifies the password that must be supplied for the default Bacula
           Console to be authorized. The same password must appear in the
           Director resource of the Console configuration file. For added
@@ -135,7 +251,7 @@ let
         type = types.enum [ "no" "yes" ];
         default = "no";
         example = "yes";
-        description = lib.mdDoc ''
+        description = mdDoc ''
           If Monitor is set to `no`, this director will have
           full access to this Storage daemon. If Monitor is set to
           `yes`, this director will only be able to fetch the
@@ -146,6 +262,13 @@ let
           security problems.
         '';
       };
+
+      tls = mkOption {
+        type = types.submodule (tlsOptions "${submodulePath}.director.<name>");
+        description = mdDoc ''
+          TLS Options for the Director in this Configuration.
+        '';
+      };
     };
   };
 
@@ -154,7 +277,7 @@ let
     options = {
       changerDevice = mkOption {
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The specified name-string must be the generic SCSI device name of the
           autochanger that corresponds to the normal read/write Archive Device
           specified in the Device resource. This generic SCSI device name
@@ -173,7 +296,7 @@ let
 
       changerCommand = mkOption {
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The name-string specifies an external program to be called that will
           automatically change volumes as required by Bacula. Normally, this
           directive will be specified only in the AutoChanger resource, which
@@ -195,14 +318,14 @@ let
       };
 
       devices = mkOption {
-        description = lib.mdDoc "";
+        description = mdDoc "";
         type = types.listOf types.str;
       };
 
       extraAutochangerConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Autochanger directive.
         '';
         example = ''
@@ -219,7 +342,7 @@ let
       archiveDevice = mkOption {
         # TODO: required?
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The specified name-string gives the system file name of the storage
           device managed by this storage daemon. This will usually be the
           device file name of a removable storage device (tape drive), for
@@ -236,7 +359,7 @@ let
       mediaType = mkOption {
         # TODO: required?
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The specified name-string names the type of media supported by this
           device, for example, `DLT7000`. Media type names are
           arbitrary in that you set them to anything you want, but they must be
@@ -274,7 +397,7 @@ let
       extraDeviceConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Device directive.
         '';
         example = ''
@@ -295,7 +418,7 @@ in {
       enable = mkOption {
         type = types.bool;
         default = false;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Whether to enable the Bacula File Daemon.
         '';
       };
@@ -304,7 +427,7 @@ in {
         default = "${config.networking.hostName}-fd";
         defaultText = literalExpression ''"''${config.networking.hostName}-fd"'';
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The client name that must be used by the Director when connecting.
           Generally, it is a good idea to use a name related to the machine so
           that error messages can be easily identified if you have multiple
@@ -315,7 +438,7 @@ in {
       port = mkOption {
         default = 9102;
         type = types.port;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           This specifies the port number on which the Client listens for
           Director connections. It must agree with the FDPort specified in
           the Client resource of the Director's configuration file.
@@ -324,16 +447,26 @@ in {
 
       director = mkOption {
         default = {};
-        description = lib.mdDoc ''
+        description = mdDoc ''
           This option defines director resources in Bacula File Daemon.
         '';
-        type = with types; attrsOf (submodule directorOptions);
+        type = types.attrsOf (types.submodule (directorOptions "services.bacula-fd"));
       };
 
+
+      tls = mkOption {
+        type = types.submodule (tlsOptions "services.bacula-fd");
+        default = { };
+        description = mdDoc ''
+          TLS Options for the File Daemon.
+          Important notice: The backup won't be encrypted.
+        '';
+       };
+
       extraClientConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Client directive.
         '';
         example = ''
@@ -345,7 +478,7 @@ in {
       extraMessagesConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Messages directive.
         '';
         example = ''
@@ -358,7 +491,7 @@ in {
       enable = mkOption {
         type = types.bool;
         default = false;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Whether to enable Bacula Storage Daemon.
         '';
       };
@@ -367,7 +500,7 @@ in {
         default = "${config.networking.hostName}-sd";
         defaultText = literalExpression ''"''${config.networking.hostName}-sd"'';
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Specifies the Name of the Storage daemon.
         '';
       };
@@ -375,7 +508,7 @@ in {
       port = mkOption {
         default = 9103;
         type = types.port;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Specifies port number on which the Storage daemon listens for
           Director connections.
         '';
@@ -383,32 +516,32 @@ in {
 
       director = mkOption {
         default = {};
-        description = lib.mdDoc ''
+        description = mdDoc ''
           This option defines Director resources in Bacula Storage Daemon.
         '';
-        type = with types; attrsOf (submodule directorOptions);
+        type = types.attrsOf (types.submodule (directorOptions "services.bacula-sd"));
       };
 
       device = mkOption {
         default = {};
-        description = lib.mdDoc ''
+        description = mdDoc ''
           This option defines Device resources in Bacula Storage Daemon.
         '';
-        type = with types; attrsOf (submodule deviceOptions);
+        type = types.attrsOf (types.submodule deviceOptions);
       };
 
       autochanger = mkOption {
         default = {};
-        description = lib.mdDoc ''
+        description = mdDoc ''
           This option defines Autochanger resources in Bacula Storage Daemon.
         '';
-        type = with types; attrsOf (submodule autochangerOptions);
+        type = types.attrsOf (types.submodule autochangerOptions);
       };
 
       extraStorageConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Storage directive.
         '';
         example = ''
@@ -420,13 +553,21 @@ in {
       extraMessagesConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Messages directive.
         '';
         example = ''
           console = all
         '';
       };
+      tls = mkOption {
+        type = types.submodule (tlsOptions "services.bacula-sd");
+        default = { };
+        description = mdDoc ''
+          TLS Options for the Storage Daemon.
+          Important notice: The backup won't be encrypted.
+        '';
+       };
 
     };
 
@@ -434,7 +575,7 @@ in {
       enable = mkOption {
         type = types.bool;
         default = false;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Whether to enable Bacula Director Daemon.
         '';
       };
@@ -443,7 +584,7 @@ in {
         default = "${config.networking.hostName}-dir";
         defaultText = literalExpression ''"''${config.networking.hostName}-dir"'';
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           The director name used by the system administrator. This directive is
           required.
         '';
@@ -452,7 +593,7 @@ in {
       port = mkOption {
         default = 9101;
         type = types.port;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Specify the port (a positive integer) on which the Director daemon
           will listen for Bacula Console connections. This same port number
           must be specified in the Director resource of the Console
@@ -465,7 +606,7 @@ in {
       password = mkOption {
         # TODO: required?
         type = types.str;
-        description = lib.mdDoc ''
+        description = mdDoc ''
            Specifies the password that must be supplied for a Director.
         '';
       };
@@ -473,7 +614,7 @@ in {
       extraMessagesConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Messages directive.
         '';
         example = ''
@@ -484,7 +625,7 @@ in {
       extraDirectorConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration to be passed in Director directive.
         '';
         example = ''
@@ -496,13 +637,22 @@ in {
       extraConfig = mkOption {
         default = "";
         type = types.lines;
-        description = lib.mdDoc ''
+        description = mdDoc ''
           Extra configuration for Bacula Director Daemon.
         '';
         example = ''
           TODO
         '';
       };
+
+      tls = mkOption {
+        type = types.submodule (tlsOptions "services.bacula-dir");
+        default = { };
+        description = mdDoc ''
+          TLS Options for the Director.
+          Important notice: The backup won't be encrypted.
+        '';
+       };
     };
   };