diff --git a/install-scripts/installer b/install-scripts/installer
index 33d20e9..bd0d4c3 100644
--- a/install-scripts/installer
+++ b/install-scripts/installer
@@ -10,7 +10,28 @@
 #       git.xdrm.io       #
 #*************************#
 
-source ./format;
+S="20"
+
+inline_progress(){
+
+	# 1. init arguments
+	text=""
+	size="$S"
+	sep=" "
+
+	# 2. extract text
+	test ! -z "$1" && text="$1";
+
+	# 3. extract size
+	test ! -z "$2" && test "`expr $2 + 0 2>/dev/null`" = "$2" && size="$2";
+
+	# 4. Write text
+	len="`echo -n \"$text\" | wc -m`";
+	echo -n "$text";
+	for i in `seq $len $size`; do echo -n "$sep"; done;
+
+	return;
+}
 
 
 
@@ -19,7 +40,6 @@ source ./format;
 echo -e "\e[33m>\e[0m (1) required programs \e[33m<\e[0m"
 
 requirements="curl git docker docker-compose make"
-set_inline_progress_size "20";
 
 for r in $requirements; do
 
@@ -128,9 +148,32 @@ else
 
 	http_installer=$(echo $candidates | awk "{print \$$install}")
 fi;
+echo;
 
-echo "http_installer: $http_installer"
+# 5. configuration root dir
+inline_progress "   . config root";
 
+http_root="/etc/$http_installer";
+if [ -d "$http_root" ]; then
+	echo "ok";
+else
+	echo "missing";
+	echo -e "\n\e[31m/!\\\\\e[0m  cannot find configuration folder \e[33m$http_root\e[0m. aborting installation";
+	exit 1;
+fi;
+
+# 6. configuration structure
+inline_progress "   . config tree";
+
+if [ -d "$http_root/sites-available" -a -d "$http_root/sites-enabled" ]; then
+	echo "ok";
+else
+	echo "invalid";
+	echo -e "\n     invalid configuration structure. You might have \e[33m$http_root/sites-available\e[0m containing";
+	echo -e "\e[31m/!\\\\\e[0m  your configurations and $http_root/sites-enabled containing symbolic links";
+	echo -e "     only for activated configurations. aborting installation";
+	exit 1;
+fi;
 
 
 # (4) information disclaimer
@@ -165,12 +208,13 @@ echo -e "  \e[34m(!)\e[0m             the \e[34m<HOST>\e[0m \e[33mtest.google.co
 # (5) prompt server variables
 #--------------------------------------------------------#
 echo;
-echo -e "\e[33m>\e[0m (5) variables \e[33m<\e[0m";
+echo -e "\e[33m>\e[0m (5) redirection variables \e[33m<\e[0m";
 
 # 1. Port
 minport="1024"
 maxport="49151"
 echo -e "   * what port do you want docker to use ? (between $minport and $maxport)";
+echo -e "     ( values other than \e[33m8080\e[0m may be unstable )";
 echo -en "     \e[34m<PORT>\e[0m = ";
 read port;
 
@@ -193,4 +237,126 @@ if [ -z "$host" ]; then
 	echo;
 	echo -e "\e[31m/!\\\\\e[0m  invalid host. aborting installation"
 	exit 1;
-fi;
\ No newline at end of file
+fi;
+
+# 3. Unlock permissions
+echo -n "   * sudo access   ";
+if sudo echo "granted"; then
+	echo -n "";
+else
+	echo -e "\e[31m/!\\\\\e[0m  permission issue. you must launch the installer with a sudoer. aborting installation"
+	exit 1;
+fi;
+
+
+
+
+
+# (6) pre-install: reverse-proxy
+#--------------------------------------------------------#
+echo;
+echo -e "\e[33m>\e[0m (6) reverse proxy \e[33m<\e[0m";
+
+# (1) LOCAL DNS #
+inline_progress "   . local dns";
+
+# 1.1. remove previously generated + append new line
+cat /etc/hosts | grep -vP "# generated by: ptut installer" > /tmp/installer_hosts;
+echo -e "127.0.0.1\t$host\t# generated by: ptut installer" | sudo tee -a /tmp/installer_hosts >/dev/null;
+
+sudo cp /etc/hosts /etc/hosts.backup;
+sudo mv /tmp/installer_hosts /etc/hosts;
+c2="$?";
+
+# 1.2. manage errors
+if [ "$c2" = "0" ]; then
+	echo "ok";
+else
+	echo;
+	echo -e "\e[31m/!\\\\\e[0m  cannot write to /etc/hosts. skipping this step."
+fi;
+
+
+inline_progress "   * $http_installer"; echo;
+
+# 1. Copy configuration
+echo -n "     - create proxy configuration  ";
+if [ "$http_installer" = "apache2" ]; then
+	echo """<VirtualHost *:80>
+	ServerName $host
+	ServerAlias www.$host
+
+	ProxyPreserveHost On
+	ProxyRequests off
+	ProxyPass / http://127.0.0.1:$port/
+	ProxyPassReverse / http://127.0.0.1:$port/
+</VirtualHost>""" | sudo tee $http_root/sites-available/$host.reverse-proxy > /dev/null;
+
+elif [ "$http_installer" = "nginx" ]; then
+	echo """server {
+	listen 80;
+	server_name $host www.$host;
+
+	location / {
+		proxy_set_header Host \$host;
+		proxy_pass http://127.0.0.1:$port;
+	}
+}""" | sudo tee $http_root/sites-available/$host.reverse-proxy > /dev/null;
+fi;
+
+# manage error
+if [ "$?" = "0" ]; then
+	echo "ok";
+else
+	echo "error";
+	echo -e "\n\e[31m/!\\\\\e[0m  cannot write to $http_root/sites-availables/. aborting installation";
+	exit 1;
+fi;
+
+echo -n "     - enable proxy                ";
+sudo ln -fs ../sites-available/$host.reverse-proxy $http_root/sites-enabled/$host.reverse-proxy;
+echo "ok";
+
+echo -n "     - reload server               ";
+sudo systemctl is-active $http_installer || sudo systemctl start $http_installer;
+sudo systemctl reload $http_installer;
+echo "ok";
+
+
+
+# (7) clone sources
+#--------------------------------------------------------#
+echo;
+echo -e "\e[33m>\e[0m (7) fetching \e[33m<\e[0m";
+
+# 1. Clone
+inline_progress "   . cloning";
+git clone --recursive https://git.xdrm.io/ptut/virtenv.git $host;
+if [ "$?" = "0" ]; then
+	echo "ok";
+else
+	echo "error";
+	echo -e "\n\e[31m/!\\\\\e[0m  cannot clone sources to ./$host. aborting installation";
+	exit 1;
+fi;
+
+# 2. Fetch database
+inline_progress "   . fetch data";
+mkdir -p ./$host/metactl/persistent \
+&& curl https://xdrm.io/script/ptut-database > ./$host/metactl/persistent/mariadb.sql;
+
+if [ "$?" = "0" ]; then
+	echo "ok";
+else
+	echo "error";
+	echo -e "\n\e[31m/!\\\\\e[0m  cannot fetch data. aborting installation";
+	exit 1;
+fi;
+
+# (8) make installer
+#--------------------------------------------------------#
+echo;
+echo -e "\e[33m>\e[0m (8) installer \e[33m<\e[0m";
+make -C ./$host start;
+
+