diff --git a/src/bw/lua/bunkerweb/utils.lua b/src/bw/lua/bunkerweb/utils.lua
index b4853ee19..f0455cb60 100644
--- a/src/bw/lua/bunkerweb/utils.lua
+++ b/src/bw/lua/bunkerweb/utils.lua
@@ -289,8 +289,9 @@ end
 utils.get_reason = function(ctx)
 	-- ngx.ctx
 	if ctx and ctx.bw and ctx.bw.reason then
-		return ctx.bw.reason, ctx.bw.reason_data or {}
+		return ctx.bw.reason, ctx.bw.reason_data or {}, ctx.bw.security_mode
 	end
+	local security_mode = utils.get_security_mode(ctx)
 	-- ngx.var
 	local var_reason = var.reason
 	if var_reason and var_reason ~= "" then
@@ -302,11 +303,11 @@ utils.get_reason = function(ctx)
 				reason_data = data
 			end
 		end
-		return var_reason, reason_data
+		return var_reason, reason_data, security_mode
 	end
 	-- os.getenv
 	if os.getenv("REASON") == "modsecurity" then
-		return "modsecurity", {}
+		return "modsecurity", {}, security_mode
 	end
 	-- datastore ban
 	local ip
@@ -321,7 +322,7 @@ utils.get_reason = function(ctx)
 		if ok then
 			banned = ban_data["reason"]
 		end
-		return banned, {}
+		return banned, {}, security_mode
 	end
 	-- unknown
 	if ngx.status == utils.get_deny_status() then
@@ -330,10 +331,11 @@ utils.get_reason = function(ctx)
 	return nil
 end
 
-utils.set_reason = function(reason, reason_data, ctx)
+utils.set_reason = function(reason, reason_data, ctx, security_mode)
 	if ctx and ctx.bw then
 		ctx.bw.reason = reason or "unknown"
 		ctx.bw.reason_data = reason_data or {}
+		ctx.bw.security_mode = security_mode
 	end
 	if var.reason then
 		var.reason = reason
@@ -572,6 +574,14 @@ utils.get_deny_status = function()
 	return 444
 end
 
+utils.get_security_mode = function(ctx)
+	local security_mode, err = utils.get_variable("SECURITY_MODE", true, ctx)
+	if not security_mode then
+		return "block"
+	end
+	return security_mode
+end
+
 utils.get_session = function(ctx)
 	-- Return session from ctx if already there
 	if ctx.bw.sessions_session then
diff --git a/src/common/confs/server-http/access-lua.conf b/src/common/confs/server-http/access-lua.conf
index e906a2a7c..f0fc0500d 100644
--- a/src/common/confs/server-http/access-lua.conf
+++ b/src/common/confs/server-http/access-lua.conf
@@ -13,6 +13,7 @@ access_by_lua_block {
 	local INFO = ngx.INFO
 	local WARN = ngx.WARN
 	local NOTICE = ngx.NOTICE
+	local OK = ngx.OK
 	local HTTP_MOVED_TEMPORARILY = ngx.HTTP_MOVED_TEMPORARILY
 	local fill_ctx = helpers.fill_ctx
 	local save_ctx = helpers.save_ctx
@@ -24,6 +25,7 @@ access_by_lua_block {
 	local set_reason = utils.set_reason
 	local get_deny_status = utils.get_deny_status
 	local save_session = utils.save_session
+	local get_security_mode = utils.get_security_mode
 	local tostring = tostring
 
 	-- Don't process internal requests
@@ -49,6 +51,9 @@ access_by_lua_block {
 	end
 	logger:log(INFO, "ngx.ctx filled (ret = " .. ret .. ")")
 
+	-- Get security mode
+	local security_mode = get_security_mode(ctx)
+
 	-- Process bans as soon as possible
 	if not is_whitelisted(ctx) then
 		local banned, reason, ttl = is_banned(ctx.bw.remote_addr)
@@ -56,11 +61,16 @@ access_by_lua_block {
 			logger:log(ERR, "can't check if IP " .. ctx.bw.remote_addr .. " is banned : " .. reason)
 		elseif banned then
 			ctx.bw.is_banned = true
-			set_reason(reason, {}, ctx)
+			set_reason(reason, {}, ctx, security_mode)
 			save_ctx(ctx)
+			if security_mode == "block" then
+				logger:log(WARN,
+					"IP " .. ctx.bw.remote_addr .. " is banned with reason " .. reason .. " (" .. tostring(ttl) .. "s remaining)")
+				return exit(get_deny_status())
+			end
 			logger:log(WARN,
-				"IP " .. ctx.bw.remote_addr .. " is banned with reason " .. reason .. " (" .. tostring(ttl) .. "s remaining)")
-			return exit(get_deny_status())
+					"detected IP " .. ctx.bw.remote_addr .. " ban with reason " .. reason .. " (" .. tostring(ttl) .. "s remaining)")
+			return exit(OK)
 		else
 			logger:log(INFO, "IP " .. ctx.bw.remote_addr .. " is not banned")
 		end
@@ -101,7 +111,10 @@ access_by_lua_block {
 						logger:log(INFO, plugin_id .. ":access() call successful : " .. ret.msg)
 					end
 					if ret.status and not ret.redirect then
-						if ret.status == get_deny_status() then
+						if security_mode == "detect" then
+							logger:log(WARN, "detected deny access from " .. plugin_id .. " : " .. ret.msg)
+							break
+						elseif ret.status == get_deny_status() then
 							set_reason(plugin_id, ret.data, ctx)
 							logger:log(WARN, "denied access from " .. plugin_id .. " : " .. ret.msg)
 						else
diff --git a/src/common/confs/server-http/log-lua.conf b/src/common/confs/server-http/log-lua.conf
index bc3cafc52..a58b4bf2e 100644
--- a/src/common/confs/server-http/log-lua.conf
+++ b/src/common/confs/server-http/log-lua.conf
@@ -74,9 +74,13 @@ log_by_lua_block {
 	logger:log(INFO, "called log() methods of plugins")
 
 	-- Display reason at info level
-	local reason, reason_data = get_reason(ctx)
+	local reason, reason_data, security_mode = get_reason(ctx)
 	if reason then
-		logger:log(INFO, "client was denied with reason " .. reason .. " and data = " .. encode(reason_data))
+		if security_mode == "block" then
+			logger:log(INFO, "client was denied with reason " .. reason .. " and data = " .. encode(reason_data))
+		else
+			logger:log(INFO, "detected client deny with reason " .. reason .. " and data = " .. encode(reason_data))
+		end
 	end
 
 	logger:log(INFO, "log phase ended")
diff --git a/src/common/core/metrics/metrics.lua b/src/common/core/metrics/metrics.lua
index e0ae6a9f2..e8963b91c 100644
--- a/src/common/core/metrics/metrics.lua
+++ b/src/common/core/metrics/metrics.lua
@@ -52,7 +52,7 @@ function metrics:log(bypass_checks)
 		return self:ret(true, "metrics are disabled")
 	end
 	-- Store blocked requests
-	local reason, data = get_reason(self.ctx)
+	local reason, data, security_mode = get_reason(self.ctx)
 	if reason then
 		local country = "local"
 		local err
@@ -74,6 +74,7 @@ function metrics:log(bypass_checks)
 			reason = reason,
 			server_name = self.ctx.bw.server_name,
 			data = data,
+			security_mode = security_mode
 		}
 		-- Get current requests
 		local requests = lru:get("requests")
diff --git a/src/common/core/modsecurity/confs/server-http/modsecurity-rules.conf.modsec b/src/common/core/modsecurity/confs/server-http/modsecurity-rules.conf.modsec
index d509966ee..efe2174a6 100644
--- a/src/common/core/modsecurity/confs/server-http/modsecurity-rules.conf.modsec
+++ b/src/common/core/modsecurity/confs/server-http/modsecurity-rules.conf.modsec
@@ -2,7 +2,11 @@
 {% set json = import("json") %}
 {% set service_id = SERVER_NAME.split(" ")[0] %}
 # process rules with disruptive actions
+{% if SECURITY_MODE == "block" %}
 SecRuleEngine {{ MODSECURITY_SEC_RULE_ENGINE }}
+{% else %}
+SecRuleEngine DetectionOnly
+{% endif %}
 
 # allow body checks
 SecRequestBodyAccess On
diff --git a/src/common/settings.json b/src/common/settings.json
index 8d20050ee..c576e7927 100644
--- a/src/common/settings.json
+++ b/src/common/settings.json
@@ -343,5 +343,14 @@
     "label": "Use template",
     "regex": "^.*$",
     "type": "text"
+  },
+  "SECURITY_MODE": {
+    "context": "multisite",
+    "default": "block",
+    "help": "Defines the response to threats: \"detect\" to monitor and log, or \"block\" to prevent access and log incidents.",
+    "id": "security-mode",
+    "label": "Security mode",
+    "regex": "^(detect|block)$",
+    "type": "check"
   }
 }
diff --git a/src/ui/app/templates/reports.html b/src/ui/app/templates/reports.html
index 2a21cd8d3..bca10105a 100644
--- a/src/ui/app/templates/reports.html
+++ b/src/ui/app/templates/reports.html
@@ -40,6 +40,9 @@
                     <th data-bs-toggle="tooltip"
                         data-bs-placement="bottom"
                         data-bs-original-title="Additional data about the Report">Data</th>
+                    <th data-bs-toggle="tooltip"
+                        data-bs-placement="bottom"
+                        data-bs-original-title="Security mode">Security mode</th>
                 </tr>
             </thead>
             <tbody>
@@ -74,6 +77,7 @@
                         <td>{{ report["reason"] }}</td>
                         <td>{{ report["server_name"] }}</td>
                         <td>{{ report["data"] }}</td>
+                        <td>{{ report["security_mode"] }}</td>
                     </tr>
                 {% endfor %}
             </tbody>