diff --git a/net/haproxy/pkg-descr b/net/haproxy/pkg-descr
index aa184412f..3b578b24b 100644
--- a/net/haproxy/pkg-descr
+++ b/net/haproxy/pkg-descr
@@ -11,6 +11,7 @@ Plugin Changelog
 Added:
 * add support for advanced resolver properties (#2330)
 * add graceful stop timeout to service settings
+* support "monitor-uri" and "monitor fail" in rules (#2387)
 
 Fixed:
 * no haproxy.conf after restoring a config backup (#2474)
diff --git a/net/haproxy/src/opnsense/mvc/app/controllers/OPNsense/HAProxy/forms/dialogAction.xml b/net/haproxy/src/opnsense/mvc/app/controllers/OPNsense/HAProxy/forms/dialogAction.xml
index 1e8683637..f0d17e77e 100644
--- a/net/haproxy/src/opnsense/mvc/app/controllers/OPNsense/HAProxy/forms/dialogAction.xml
+++ b/net/haproxy/src/opnsense/mvc/app/controllers/OPNsense/HAProxy/forms/dialogAction.xml
@@ -354,6 +354,17 @@
         <type>text</type>
         <help><![CDATA[A standard HAProxy expression formed by a sample-fetch followed by some converters.]]></help>
     </field>
+    <field>
+        <label>Parameters</label>
+        <type>header</type>
+        <style>type_table table_monitor_fail</style>
+    </field>
+    <field>
+        <id>action.monitor_fail_uri</id>
+        <label>Monitoring URI</label>
+        <type>text</type>
+        <help><![CDATA[Specifies a URI which will be intercepted to return HAProxy's health status instead of forwarding the request. When a HTTP request is received, HAProxy will return either "HTTP/1.0 200 OK" or "HTTP/1.0 503 Service unavailable", depending on the fined failure conditions.]]></help>
+    </field>
     <field>
         <label>Parameters</label>
         <type>header</type>
diff --git a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
index b6c025d91..8521443fe 100644
--- a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
+++ b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
@@ -2068,6 +2068,7 @@
                         <http-response_replace-value>http-response header replace value</http-response_replace-value>
                         <http-response_set-status>http-response set-status</http-response_set-status>
                         <http-response_set-var>http-response set-var</http-response_set-var>
+                        <monitor_fail>monitor fail: report failure to a monitor request</monitor_fail>
                         <tcp-request_connection_accept>tcp-request connection accept</tcp-request_connection_accept>
                         <tcp-request_connection_reject>tcp-request connection reject</tcp-request_connection_reject>
                         <tcp-request_content_accept>tcp-request content accept</tcp-request_content_accept>
@@ -2252,6 +2253,10 @@
                     <mask>/^.{1,4096}$/u</mask>
                     <Required>N</Required>
                 </http_response_set_var_expr>
+                <monitor_fail_uri type="TextField">
+                    <mask>/^.{1,4096}$/u</mask>
+                    <Required>N</Required>
+                </monitor_fail_uri>
                 <tcp_request_content_lua type="TextField">
                     <mask>/^.{1,4096}$/u</mask>
                     <Required>N</Required>
diff --git a/net/haproxy/src/opnsense/service/templates/OPNsense/HAProxy/haproxy.conf b/net/haproxy/src/opnsense/service/templates/OPNsense/HAProxy/haproxy.conf
index 71c439df1..15dc3f76e 100644
--- a/net/haproxy/src/opnsense/service/templates/OPNsense/HAProxy/haproxy.conf
+++ b/net/haproxy/src/opnsense/service/templates/OPNsense/HAProxy/haproxy.conf
@@ -522,6 +522,14 @@
 {%             set action_enabled = '0' %}
     # ERROR: missing parameters
 {%           endif %}
+{%         elif action_data.type == 'monitor_fail' %}
+{%           if action_data.monitor_fail_uri|default("") != "" %}
+{%             do action_options.append('monitor-uri ' ~ action_data.monitor_fail_uri ~ '\n   ') %}
+{%             do action_options.append('monitor fail') %}
+{%           else %}
+{%             set action_enabled = '0' %}
+    # ERROR: missing parameters
+{%           endif %}
 {%         elif action_data.type == 'tcp-request_connection_accept' %}
 {%           do action_options.append('tcp-request connection accept') %}
 {%         elif action_data.type == 'tcp-request_connection_reject' %}