diff --git a/confs2/site/error.conf b/confs2/site/error.conf
index 7d7a70e..1636d1a 100644
--- a/confs2/site/error.conf
+++ b/confs2/site/error.conf
@@ -1,7 +1,13 @@
-error_page {{ CODE }} {{ PAGE }};
+{% if ERRORS != "" %}
+	{% for element in ERRORS.split(" ") %}
+		{% set code = element.split("=")[0] %}
+		{% set page = element.split("=")[1] %}
+error_page {{ code }} {{ page }};
 
-location = {{ PAGE }} {
+location = {{ page }} {
     root {{ ROOT_FOLDER }};
     modsecurity off;
     internal;
 }
+	{% endfor %}
+{% endif %}
diff --git a/confs2/site/main-lua.conf b/confs2/site/main-lua.conf
index cb98819..a6310d9 100644
--- a/confs2/site/main-lua.conf
+++ b/confs2/site/main-lua.conf
@@ -1,4 +1,8 @@
+{% if ANTIBOT_SESSION_SECRET == "random" %}
+set $session_secret {{ random(32) }} ;
+{% else %}
 set $session_secret {{ ANTIBOT_SESSION_SECRET }};
+{% endif %}
 set $session_check_addr on;
 
 access_by_lua_block {
diff --git a/confs2/site/modsecurity-rules.conf b/confs2/site/modsecurity-rules.conf
index d0dd42f..37f0a7d 100644
--- a/confs2/site/modsecurity-rules.conf
+++ b/confs2/site/modsecurity-rules.conf
@@ -58,13 +58,26 @@ SecAuditLog /var/log/nginx/modsec_audit.log
 include {{ NGINX_PREFIX }}modsecurity-clamav.conf
 {% endif %}
 
-# include OWASP CRS rules
+# include OWASP CRS configuration
 {% if USE_MODSECURITY_CRS == "yes" %}
 include /opt/owasp/crs.conf
-# TODO : include without errors ?
-#{{ MODSECURITY_INCLUDE_CUSTOM_CRS }}
+
+# custom CRS configurations before loading rules (exclusions) 
+{% if is_custom_conf("/modsec-crs-confs") %}
+include /modsec-crs-confs/*.conf
+{% endif %}
+{% if MULTISITE == "yes" and is_custom_conf("/modsec-crs-confs/" + FIRST_SERVER) %}
+include /modsec-crs-confs/{{ FIRST_SERVER }}/*.conf
+{% endif %}
+
+# include OWASP CRS rules
 include /opt/owasp/crs/*.conf
 {% endif %}
 
-# TODO : include custom rules
-# {{ MODSECURITY_INCLUDE_CUSTOM_RULES }}
+# custom rules after loading the CRS
+{% if is_custom_conf("/modsec-confs") %}
+include /modsec-confs/*.conf
+{% endif %}
+{% if MULTISITE == "yes" and is_custom_conf("/modsec-confs/" + FIRST_SERVER) %}
+include /modsec-confs/{{ FIRST_SERVER }}/*.conf
+{% endif %}
diff --git a/confs2/site/reverse-proxy.conf b/confs2/site/reverse-proxy.conf
index bef8844..284df6e 100644
--- a/confs2/site/reverse-proxy.conf
+++ b/confs2/site/reverse-proxy.conf
@@ -1,7 +1,25 @@
-location {{ REVERSE_PROXY_URL }} {
+{% if USE_REVERSE_PROXY == "yes" %}
+	{% for k, v in all.items() %}
+		{% if k.startswith("REVERSE_PROXY_URL") %}
+			{% set url = v %}
+			{% set host = all[k.replace("URL", "HOST")] if k.replace("URL", "HOST") in all else "" %}
+			{% set ws = all[k.replace("URL", "WS")] if k.replace("URL", "WS") in all else "" %}
+			{% set headers = all[k.replace("URL", "HEADERS")] if k.replace("URL", "HEADERS") in all else "" %}
+location {{ url }} {% raw %}{{% endraw %}
 	etag off;
-	proxy_pass {{ REVERSE_PROXY_HOST }};
-	{{ REVERSE_PROXY_HEADERS }}
-	{{ REVERSE_PROXY_WS }}
-	{{ REVERSE_PROXY_CUSTOM_HEADERS }}
-}
+	proxy_pass {{ host }};
+	include {{ NGINX_PREFIX }}reverse-proxy-headers.conf;
+			{% if ws == "yes" %}
+	proxy_http_version 1.1;
+	proxy_set_header Upgrade $http_upgrade;
+	proxy_set_header Connection "Upgrade";
+			{% endif %}
+			{% if headers != "" %}
+				{% for header in headers.split(";") %}
+	proxy_set_header {{ header }};
+				{% endfor %}
+			{% endif %}
+{% raw %}}{% endraw %}
+		{% endif %}
+	{% endfor %}
+{% endif %}
diff --git a/confs2/site/server.conf b/confs2/site/server.conf
index 256e28c..99ba927 100644
--- a/confs2/site/server.conf
+++ b/confs2/site/server.conf
@@ -130,7 +130,8 @@ server {
 	include {{ NGINX_PREFIX }}cookie-flags.conf;
 {% endif %}
 
-	# TODO : ERRORS
+	# custom errors
+	include {{ NGINX_PREFIX }}error.conf;
 
 	# client caching
 {% if USE_CLIENT_CACHE == "yes" %}
@@ -165,7 +166,7 @@ server {
 
 	# reverse proxy
 {% if USE_REVERSE_PROXY == "yes" %}
-	include {{ NGINX_PREFIX }}reverse-proxy-*.conf;
+	include {{ NGINX_PREFIX }}reverse-proxy.conf;
 {% endif %}
 
 	# remote PHP
diff --git a/gen/Configurator.py b/gen/Configurator.py
index 03b8fa4..5182fd8 100644
--- a/gen/Configurator.py
+++ b/gen/Configurator.py
@@ -40,4 +40,9 @@ class Configurator :
 			real_var = var
 		elif var[len(var.split("_")[0])+1:] in self.__settings :
 			real_var = var[len(var.split("_")[0])+1:]
+		elif re.search("\\_\d+$", var) and ("_".join(var.split("_")[:-1]) in self.__settings or "_".join(var.split("_")[:-1][1:]) in self.__settings) :
+			if "_".join(var.split("_")[:-1]) in self.__settings :
+				real_var = "_".join(var.split("_")[:-1])
+			else :
+				real_var = "_".join(var.split("_")[:-1][1:])
 		return real_var != "" and re.search(self.__settings[real_var]["regex"], value) and (not multisite_only or self.__settings[real_var]["context"] == "multisite")
diff --git a/gen/Templator.py b/gen/Templator.py
index 08d8f4b..97e4b57 100644
--- a/gen/Templator.py
+++ b/gen/Templator.py
@@ -1,4 +1,4 @@
-import jinja2, glob, os, pathlib, copy, crypt
+import jinja2, glob, os, pathlib, copy, crypt, random, string
 
 class Templator :
 
@@ -21,7 +21,7 @@ class Templator :
 			first_server = self.__config["SERVER_NAME"].split(" ")[0]
 		return self.__render("site", server_name, first_server)
 
-	def __render(self, type, server_name=None, first_server=None) :
+	def __prepare_config(self, type, server_name=None, first_server=None) :
 		real_config = copy.deepcopy(self.__config)
 		if not server_name is None :
 			real_config["SERVER_NAME"] = server_name
@@ -30,23 +30,48 @@ class Templator :
 		real_config["NGINX_PREFIX"] = self.__target_path
 		if real_config["MULTISITE"] == "yes" and type == "site" :
 			real_config["NGINX_PREFIX"] += first_server + "/"
+			real_config["ROOT_FOLDER"] += "/" + first_server
 			for variable, value in self.__config.items() :
 				if variable.startswith(first_server + "_") :
 					real_config[variable.replace(first_server + "_", "", 1)] = value
+		if real_config["ROOT_SITE_SUBFOLDER"] != "" :
+			real_config["ROOT_FOLDER"] += "/" + real_config["ROOT_SITE_SUBFOLDER"]
+		return real_config
+
+	def __save_config(self, type, config) :
+		data = ""
+		for variable, value in config.items() :
+			data += variable + "=" + value + "\n"
+		file = self.__output_path
+		if type == "global" :
+			file += "/global.env"
+		elif config["MULTISITE"] == "yes" :
+			file += "/" + config["FIRST_SERVER"] + "/site.env"
+		else :
+			file += "/site.env"
+		with open(file, "w") as f :
+			f.write(data)
+
+	def __render(self, type, server_name=None, first_server=None) :
+		real_config = self.__prepare_config(type, server_name, first_server)
 		for filename in glob.iglob(self.__input_path + "/" + type + "**/**", recursive=True) :
-			if os.path.isfile(filename) :
-				relative_filename = filename.replace(self.__input_path, "").replace(type + "/", "")
-				template = self.__template_env.get_template(type + "/" + relative_filename)
-				template.globals["has_value"] = Templator.has_value
-				template.globals["sha512_crypt"] = Templator.sha512_crypt
-				output = template.render(real_config, all=real_config)
-				if real_config["MULTISITE"] == "yes" and type == "site" :
-					relative_filename = first_server + "/" + relative_filename
-				if "/" in relative_filename :
-					directory = relative_filename.replace(relative_filename.split("/")[-1], "")
-					pathlib.Path(self.__output_path + "/" + directory).mkdir(parents=True, exist_ok=True)
-				with open(self.__output_path + "/" + relative_filename, "w") as f :
-					f.write(output)
+			if not os.path.isfile(filename) :
+				continue
+			relative_filename = filename.replace(self.__input_path, "").replace(type + "/", "")
+			template = self.__template_env.get_template(type + "/" + relative_filename)
+			template.globals["has_value"] = Templator.has_value
+			template.globals["sha512_crypt"] = Templator.sha512_crypt
+			template.globals["is_custom_conf"] = Templator.is_custom_conf
+			template.globals["random"] = Templator.random
+			output = template.render(real_config, all=real_config)
+			if real_config["MULTISITE"] == "yes" and type == "site" :
+				relative_filename = real_config["FIRST_SERVER"] + "/" + relative_filename
+			if "/" in relative_filename :
+				directory = relative_filename.replace(relative_filename.split("/")[-1], "")
+				pathlib.Path(self.__output_path + "/" + directory).mkdir(parents=True, exist_ok=True)
+			with open(self.__output_path + "/" + relative_filename, "w") as f :
+				f.write(output)
+		self.__save_config(type, real_config)
 
 	@jinja2.contextfunction
 	def has_value(context, name, value) :
@@ -57,3 +82,11 @@ class Templator :
 
 	def sha512_crypt(password) :
 		return crypt.crypt(password, crypt.mksalt(crypt.METHOD_SHA512))
+
+	def is_custom_conf(folder) :
+		for filename in glob.iglob(folder + "/*.conf") :
+			return True
+		return False
+
+	def random(number) :
+		return "".join(random.choices(string.ascii_uppercase + string.ascii_lowercase + string.digits, k=number))
diff --git a/settings.json b/settings.json
index 2992aa9..31d3a77 100644
--- a/settings.json
+++ b/settings.json
@@ -749,6 +749,15 @@
                 "label": "Disable default server",
                 "regex": "^(yes|no)$",
                 "type": "checkbox"
+            },
+            {
+                "context": "multisite",
+                "default": "",
+                "env": "ERRORS",
+                "id": "errors",
+                "label": "Custom error pages (code1=/page1 code2=/page2 ...)",
+                "regex": ".*",
+                "type": "text"
             }
         ]
     },