diff --git a/security/acme-client/pkg-descr b/security/acme-client/pkg-descr
index c0fbc4497..0777c8d51 100644
--- a/security/acme-client/pkg-descr
+++ b/security/acme-client/pkg-descr
@@ -8,6 +8,14 @@ WWW: https://github.com/acmesh-official/acme.sh
 Plugin Changelog
 ================
 
+3.5
+
+Added:
+* add support for Synology DSM deploy hook (#2236)
+
+Changed:
+* refactor code to support acme.sh deploy hooks
+
 3.4
 
 Changed:
diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogAction.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogAction.xml
index db41ea648..2c875b786 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogAction.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogAction.xml
@@ -26,7 +26,7 @@
     <field>
         <label>Required Parameters</label>
         <type>header</type>
-        <style>method_table method_table_upload_highwinds</style>
+        <style>method_table method_table_configd_upload_highwinds</style>
     </field>
     <field>
         <id>action.highwinds_account_hash</id>
@@ -43,7 +43,7 @@
     <field>
         <label>Required Parameters</label>
         <type>header</type>
-        <style>method_table method_table_upload_sftp</style>
+        <style>method_table method_table_configd_upload_sftp</style>
     </field>
     <field>
         <id>action.sftp_host</id>
@@ -145,13 +145,58 @@
     <field>
         <label>Required Parameters</label>
         <type>header</type>
-        <style>method_table method_table_configd</style>
+        <style>method_table method_table_configd_generic</style>
     </field>
     <field>
-        <id>action.configd</id>
+        <id>action.configd_generic_command</id>
         <label>System Command</label>
         <type>dropdown</type>
         <help>Select a pre-defined system command which should be run.</help>
-        <style>table_optional table_optional_configd</style>
+    </field>
+    <field>
+        <label>Required Parameters</label>
+        <type>header</type>
+        <style>method_table method_table_acme_synology_dsm</style>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_hostname</id>
+        <label>Synology Hostname</label>
+        <type>text</type>
+        <help>Hostname of IP adress of the Synology DSM, i.e. synology.example.com or 192.168.0.1.</help>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_port</id>
+        <label>Synology Port</label>
+        <type>text</type>
+        <help>Port that will be used when connecting to Synology DSM.</help>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_scheme</id>
+        <label>Scheme</label>
+        <type>dropdown</type>
+        <help>Connection scheme that will be used when uploading certificates to Synology DSM.</help>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_username</id>
+        <label>Username</label>
+        <type>text</type>
+        <help>Username to login, must be an administrator.</help>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_password</id>
+        <label>Password</label>
+        <type>password</type>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_deviceid</id>
+        <label>Device ID</label>
+        <type>text</type>
+        <help>If Synology DSM has OTP enabled, then the device ID has to be provided so that no OTP is required when running the automation.</help>
+    </field>
+    <field>
+        <id>action.acme_synology_dsm_create</id>
+        <label>Create certificates</label>
+        <type>checkbox</type>
+        <help>This option ensures that a new certificate is created in Synology DSM if it does not exist yet. If unchecked only existing certificates will be updated.</help>
     </field>
 </form>
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/AcmeSynologyDsm.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/AcmeSynologyDsm.php
new file mode 100644
index 000000000..c1fb58a0a
--- /dev/null
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/AcmeSynologyDsm.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * Copyright (C) 2021 Frank Wall
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+namespace OPNsense\AcmeClient\LeAutomation;
+
+use OPNsense\AcmeClient\LeAutomationInterface;
+
+/**
+ * Run acme.sh deploy hook synology_dsm
+ * @package OPNsense\AcmeClient
+ */
+class AcmeSynologyDsm extends Base implements LeAutomationInterface
+{
+    public function prepare()
+    {
+        $this->acme_env['SYNO_Certificate'] = 'OPNsense ACME cert ' . $this->cert_id;
+        $this->acme_env['SYNO_Hostname'] = (string)$this->config->acme_synology_dsm_hostname;
+        $this->acme_env['SYNO_Port'] = (string)$this->config->acme_synology_dsm_port;
+        $this->acme_env['SYNO_Scheme'] = (string)$this->config->acme_synology_dsm_scheme;
+        $this->acme_env['SYNO_Username'] = (string)$this->config->acme_synology_dsm_username;
+        $this->acme_env['SYNO_Password'] = (string)$this->config->acme_synology_dsm_password;
+        if (!empty((string)$this->config->acme_synology_dsm_create)) {
+            $this->acme_env['SYNO_Create'] = (string)$this->config->acme_synology_dsm_create;
+        }
+        if (!empty((string)$this->config->acme_synology_dsm_deviceid)) {
+            $this->acme_env['SYNO_DID'] = (string)$this->config->acme_synology_dsm_deviceid;
+        }
+        $this->acme_args[] = '--deploy-hook synology_dsm';
+        return true;
+    }
+}
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Base.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Base.php
index 349e22bff..e15ab16f4 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Base.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Base.php
@@ -47,7 +47,7 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
      * Initialize LeAutomation object by adding the required configuration.
      * @return boolean
      */
-    public function init(string $certid, string $accountuuid)
+    public function init(string $certid, string $certname, string $accountuuid)
     {
         // Get config object
         $this->loadConfig(self::CONFIG_PATH, $this->uuid);
@@ -60,12 +60,25 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
         $this->account_id = (string)$account->id;
         $this->account_uuid = (string)$account->uuid;
 
+        // Teach acme.sh about DNS API hook location
+        $this->acme_env['_SCRIPT_HOME'] = self::ACME_SCRIPT_HOME;
+
         // Set log level
         $this->setLoglevel();
 
         // Set ACME CA
         $this->setCa($accountuuid);
 
+        // Store acme filenames
+        $this->acme_args[] = LeUtils::execSafe('--home %s', self::ACME_HOME_DIR);
+        $this->acme_args[] = LeUtils::execSafe('--certpath %s', sprintf(self::ACME_CERT_FILE, $this->cert_id));
+        $this->acme_args[] = LeUtils::execSafe('--keypath %s', sprintf(self::ACME_KEY_FILE, $this->cert_id));
+        $this->acme_args[] = LeUtils::execSafe('--capath %s', sprintf(self::ACME_CHAIN_FILE, $this->cert_id));
+        $this->acme_args[] = LeUtils::execSafe('--fullchainpath %s', sprintf(self::ACME_FULLCHAIN_FILE, $this->cert_id));
+
+        // Main domain for acme
+        $this->acme_args[] = LeUtils::execSafe('--domain %s', $certname);
+
         return true;
     }
 
@@ -80,7 +93,72 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
             return true; // not an error
         }
 
-        LeUtils::log('running automation: ' . $this->config->name);
+        // The prefix determines which automation flavour is being used.
+        if (preg_match('/acme.*/i', $this->getType())) {
+            $this->runAcme();
+        } elseif (preg_match('/configd_.*/i', $this->getType())) {
+            $this->runConfigd();
+        } else {
+            LeUtils::log_error('unsupported automation flavour: ' . $this->getType());
+            return false;
+        }
+    }
+
+    /**
+     * run acme.sh deploy hooks commands
+     * @return boolean
+     */
+    public function runAcme()
+    {
+        LeUtils::log('running automation (acme.sh): ' . $this->config->name);
+
+        // Preparation to run acme client
+        $proc_env = $this->acme_env; // env variables for proc_open()
+        $proc_env['PATH'] = $this::ACME_ENV_PATH;
+        $proc_desc = array(  // descriptor array for proc_open()
+            0 => array("pipe", "r"), // stdin
+            1 => array("pipe", "w"), // stdout
+            2 => array("pipe", "w")  // stderr
+        );
+        $proc_pipes = array();
+
+        // Run acme client
+        $acmecmd = self::ACME_CMD
+          . ' '
+          . '--deploy '
+          . implode(' ', $this->acme_args);
+        LeUtils::log_debug('running acme.sh command: ' . (string)$acmecmd, $this->debug);
+        $proc = proc_open($acmecmd, $proc_desc, $proc_pipes, null, $proc_env);
+
+        // Make sure the resource could be setup properly
+        if (is_resource($proc)) {
+            // Close all pipes
+            fclose($proc_pipes[0]);
+            fclose($proc_pipes[1]);
+            fclose($proc_pipes[2]);
+            // Get exit code
+            $result = proc_close($proc);
+        } else {
+            LeUtils::log_error('unable to start acme client process');
+            return false;
+        }
+
+        // Check validation result
+        if ($result) {
+            LeUtils::log_error('running acme.sh deploy hook failed (' . $this->getMethod() . ')');
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * run configd commands
+     * @return boolean
+     */
+    public function runConfigd()
+    {
+        LeUtils::log('running automation (configd): ' . $this->config->name);
         $backend = new \OPNsense\Core\Backend();
         $response = $backend->configdRun((string)$this->command, $this->command_args);
         return true;
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Configd.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdGeneric.php
similarity index 87%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Configd.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdGeneric.php
index 810fafab5..c56a1bb89 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/Configd.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdGeneric.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,17 +35,17 @@ use OPNsense\AcmeClient\LeUtils;
  * Run selected configd command
  * @package OPNsense\AcmeClient
  */
-class Configd extends Base implements LeAutomationInterface
+class ConfigdGeneric extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
         // Make sure a configd command was specified.
-        if (empty((string)$this->config->configd)) {
+        if (empty((string)$this->config->configd_generic_command)) {
             LeUtils::log_error('no configd command specified for automation: ' . $this->config->name);
             return false;
         }
 
-        $this->command = (string)$this->config->configd;
+        $this->command = (string)$this->config->configd_generic_command;
         return true;
     }
 }
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartGui.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartGui.php
similarity index 93%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartGui.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartGui.php
index e63cf479e..18d35b2b5 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartGui.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartGui.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ use OPNsense\AcmeClient\LeAutomationInterface;
  * Restart OPNsense WebGUI
  * @package OPNsense\AcmeClient
  */
-class RestartGui extends Base implements LeAutomationInterface
+class ConfigdRestartGui extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartHaproxy.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartHaproxy.php
similarity index 93%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartHaproxy.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartHaproxy.php
index c40e9fce7..25f351ef0 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartHaproxy.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartHaproxy.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ use OPNsense\AcmeClient\LeAutomationInterface;
  * Restart local HAProxy service
  * @package OPNsense\AcmeClient
  */
-class RestartHaproxy extends Base implements LeAutomationInterface
+class ConfigdRestartHaproxy extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartNginx.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartNginx.php
similarity index 93%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartNginx.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartNginx.php
index fc803e78a..c2e9f4863 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/RestartNginx.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdRestartNginx.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ use OPNsense\AcmeClient\LeAutomationInterface;
  * Restart local Nginx service
  * @package OPNsense\AcmeClient
  */
-class RestartNginx extends Base implements LeAutomationInterface
+class ConfigdRestartNginx extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadHighwinds.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadHighwinds.php
similarity index 93%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadHighwinds.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadHighwinds.php
index 1e9bfdcba..a17197815 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadHighwinds.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadHighwinds.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ use OPNsense\AcmeClient\LeAutomationInterface;
  * Upload certificate to Highwinds CDN API
  * @package OPNsense\AcmeClient
  */
-class UploadHighwinds extends Base implements LeAutomationInterface
+class ConfigdUploadHighwinds extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadSftp.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadSftp.php
similarity index 93%
rename from security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadSftp.php
rename to security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadSftp.php
index 11770c8f5..af4ddd8cd 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/UploadSftp.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeAutomation/ConfigdUploadSftp.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright (C) 2020 Frank Wall
+ * Copyright (C) 2020-2021 Frank Wall
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ use OPNsense\AcmeClient\LeAutomationInterface;
  * Upload certificate via SFTP to arbitrary hosts
  * @package OPNsense\AcmeClient
  */
-class UploadSftp extends Base implements LeAutomationInterface
+class ConfigdUploadSftp extends Base implements LeAutomationInterface
 {
     public function prepare()
     {
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCertificate.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCertificate.php
index 9aaf313be..72a8f1ece 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCertificate.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCertificate.php
@@ -605,7 +605,7 @@ class LeCertificate extends LeCommon
         foreach ($automations as $auto_uuid) {
             $autoFactory = new LeAutomationFactory();
             $automation = $autoFactory->getAutomation($auto_uuid);
-            $automation->init($this->getId(), (string)$this->config->account);
+            $automation->init($this->getId(), (string)$this->config->name, (string)$this->config->account);
             // Ignore invalid automations.
             if ($automation->prepare()) {
                 $automation->run();
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCommon.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCommon.php
index 5ea7b5c7d..ce1ed6e71 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCommon.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeCommon.php
@@ -41,11 +41,14 @@ abstract class LeCommon
     public const ACME_BASE_ACCOUNT_DIR = '/var/etc/acme-client/accounts';
     public const ACME_BASE_CERT_DIR = '/var/etc/acme-client/certs';
     public const ACME_BASE_CONFIG_DIR = '/var/etc/acme-client/configs';
+    public const ACME_CMD = '/usr/local/sbin/acme.sh';
     public const ACME_HOME_DIR = '/var/etc/acme-client/home';
 
     // Defaults for acme.sh
     public const ACME_ACCOUNT_KEY_LENGTH = 4096;
     public const ACME_ENV_PATH = '/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin';
+    public const ACME_SCRIPT_HOME = '/usr/local/share/examples/acme.sh';
+    public const ACME_WEBROOT = '/var/etc/acme-client/challenges';
 
     // Filenames for certs, configs, ...
     public const ACME_CERT_DIR = '/var/etc/acme-client/certs/%s/';
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/Base.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/Base.php
index d50292c66..433572cba 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/Base.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/Base.php
@@ -68,7 +68,7 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
         $this->account_uuid = (string)$account->getUuid();
 
         // Teach acme.sh about DNS API hook location
-        $this->acme_env['_SCRIPT_HOME'] = '/usr/local/share/examples/acme.sh';
+        $this->acme_env['_SCRIPT_HOME'] = self::ACME_SCRIPT_HOME;
 
         // Set log level
         $this->setLoglevel();
@@ -83,7 +83,7 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
                 $this->acme_args[] = LeUtils::execSafe('--dnssleep %s', (string)$this->config->dns_sleep);
                 break;
             case 'http01':
-                $this->acme_args[] = '--webroot /var/etc/acme-client/challenges';
+                $this->acme_args[] = '--webroot ' . self::ACME_WEBROOT;
                 break;
         }
 
@@ -159,7 +159,8 @@ abstract class Base extends \OPNsense\AcmeClient\LeCommon
         // NOTE: We "export" certificates to our own directory, so we don't have to deal
         // with domain names in filesystem, but instead can use the ID of our certObj, which
         // will never change.
-        $acmecmd = '/usr/local/sbin/acme.sh '
+        $acmecmd = self::ACME_CMD
+          . ' '
           . "--${acme_action} "
           . implode(' ', $this->acme_args) . ' '
           . LeUtils::execSafe('--accountconf %s', $account_conf_file);
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
index 9b3650d8d..c514f31c4 100644
--- a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
@@ -1042,12 +1042,13 @@
                 <type type="OptionField">
                     <Required>Y</Required>
                     <OptionValues>
-                        <restart_gui>Restart OPNsense Web UI</restart_gui>
-                        <restart_haproxy>Restart HAProxy (OPNsense plugin)</restart_haproxy>
-                        <restart_nginx>Restart Nginx (OPNsense plugin)</restart_nginx>
-                        <upload_highwinds>Upload certificate to Highwinds CDN</upload_highwinds>
-                        <upload_sftp>Upload certificate via SFTP</upload_sftp>
-                        <configd>System or Plugin Command</configd>
+                        <configd_restart_gui>Restart OPNsense Web UI</configd_restart_gui>
+                        <configd_restart_haproxy>Restart HAProxy (OPNsense plugin)</configd_restart_haproxy>
+                        <configd_restart_nginx>Restart Nginx (OPNsense plugin)</configd_restart_nginx>
+                        <configd_upload_highwinds>Upload certificate to Highwinds CDN</configd_upload_highwinds>
+                        <configd_upload_sftp>Upload certificate via SFTP</configd_upload_sftp>
+                        <acme_synology_dsm>Upload certificate to Synology DSM</acme_synology_dsm>
+                        <configd_generic>System or Plugin Command</configd_generic>
                     </OptionValues>
                 </type>
                 <highwinds_account_hash type="TextField">
@@ -1136,6 +1137,7 @@
                     <ValidationMessage>Should be a string between 1 and 255 characters.
                                        Characters are limited to [a-z], [0-9] and [{}@./-_%] and the string must neither begin nor end with '/'.</ValidationMessage>
                 </sftp_filename_fullchain>
+                <!-- old value, should be removed in next major release -->
                 <configd type="ConfigdActionsField">
                     <filters>
                         <description>/^(?!.*(Let\'s\ Encrypt|acme|[fF]irmware))([\S\s]{1,255})/</description>
@@ -1143,6 +1145,47 @@
                     <ValidationMessage>Select a command from the list.</ValidationMessage>
                     <Required>N</Required>
                 </configd>
+                <configd_generic_command type="ConfigdActionsField">
+                    <filters>
+                        <description>/^(?!.*(Let\'s\ Encrypt|acme|[fF]irmware))([\S\s]{1,255})/</description>
+                    </filters>
+                    <ValidationMessage>Select a command from the list.</ValidationMessage>
+                    <Required>N</Required>
+                </configd_generic_command>
+                <acme_synology_dsm_hostname type="HostnameField">
+                    <default></default>
+                    <Required>N</Required>
+                </acme_synology_dsm_hostname>
+                <acme_synology_dsm_port type="PortField">
+                    <default>5000</default>
+                    <Required>N</Required>
+                </acme_synology_dsm_port>
+                <acme_synology_dsm_scheme type="OptionField">
+                    <default>http</default>
+                    <Required>N</Required>
+                    <OptionValues>
+                        <http>HTTP [default]</http>
+                        <https>HTTPS</https>
+                    </OptionValues>
+                </acme_synology_dsm_scheme>
+                <acme_synology_dsm_username type="TextField">
+                    <Required>N</Required>
+                    <mask>/^.{1,1024}$/u</mask>
+                    <ValidationMessage>Should be a string between 1 and 1024 characters.</ValidationMessage>
+                </acme_synology_dsm_username>
+                <acme_synology_dsm_password type="TextField">
+                    <Required>N</Required>
+                    <mask>/^.{1,1024}$/u</mask>
+                    <ValidationMessage>Should be a string between 1 and 1024 characters.</ValidationMessage>
+                </acme_synology_dsm_password>
+                <acme_synology_dsm_create type="BooleanField">
+                    <default>1</default>
+                </acme_synology_dsm_create>
+                <acme_synology_dsm_deviceid type="TextField">
+                    <Required>N</Required>
+                    <mask>/^.{1,1024}$/u</mask>
+                    <ValidationMessage>Should be a string between 1 and 1024 characters.</ValidationMessage>
+                </acme_synology_dsm_deviceid>
             </action>
         </actions>
     </items>
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/Migrations/M3_1_0.php b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/Migrations/M3_1_0.php
new file mode 100644
index 000000000..f8f751cd2
--- /dev/null
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/Migrations/M3_1_0.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+ *    Copyright (C) 2021 Frank Wall
+ *
+ *    All rights reserved.
+ *
+ *    Redistribution and use in source and binary forms, with or without
+ *    modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *    POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+namespace OPNsense\AcmeClient\Migrations;
+
+use OPNsense\Base\BaseModelMigration;
+
+class M3_1_0 extends BaseModelMigration
+{
+    public function run($model)
+    {
+        // Search actions
+        foreach ($model->getNodeByReference('actions.action')->iterateItems() as $action) {
+            // Field "configd" was renamed to "configd_generic_command"
+            if (!empty((string)$action->configd)) {
+                $action->configd_generic_command = (string)$action->configd;
+                $action->configd = null; // clear old value
+            }
+
+            // Get old type and map to new value
+            $old_type = (string)$action->type;
+            switch ($old_type) {
+                case 'configd':
+                    $new_type = 'configd_generic';
+                    break;
+                case 'restart_gui':
+                    $new_type = 'configd_restart_gui';
+                    break;
+                case 'restart_haproxy':
+                    $new_type = 'configd_restart_haproxy';
+                    break;
+                case 'restart_nginx':
+                    $new_type = 'configd_restart_nginx';
+                    break;
+                case 'upload_highwinds':
+                    $new_type = 'configd_upload_highwinds';
+                    break;
+                case 'upload_sftp':
+                    $new_type = 'configd_upload_sftp';
+                    break;
+            }
+            $action->type = $new_type;
+        }
+    }
+}