Hi all, I finally found out how to launch a script after authentication: I have first created a module exec modatt { wait = yes program = "/home/raduser/test.php %{User-Name} " input_pairs = request output_pairs = reply } and then I have added it in instantiate and authorize section here is the php script (test.php): #!/usr/bin/php <?php $argv = $_SERVER['argv']; if ( $argv[1] == "toto") echo "Session-Timeout:=100"; else echo "Session-Timeout:=50"; ?> But I still have a problem: the session-timeout attribute is not sent to the NAS. The debug output is hereunder: Tue Sep 4 17:26:57 2007 : Debug: Exec-Program output: Session-Timeout:=100 Tue Sep 4 17:26:57 2007 : Debug: Exec-Program-Wait: value-pairs: ,Session-Timeout:=100 Tue Sep 4 17:26:57 2007 : Error: Exec-Program-Wait: /home/raduser/test.php %{User-Name} : unparsable reply Tue Sep 4 17:26:57 2007 : Debug: Exec-Program: returned: 0 But I really don't know why because I execute a sh script (instead of a php script), it works very well!! here is my sh script (test.sh): #!/bin/sh if [ $1 == "toto" ]; then echo "Session-Timeout:=100" else echo "Session-Timeout:=53" fi debug trace: Tue Sep 4 17:58:00 2007 : Debug: Exec-Program output: Session-Timeout:=100 Tue Sep 4 17:58:00 2007 : Debug: Exec-Program-Wait: value-pairs: Session-Timeout:=100 Tue Sep 4 17:58:00 2007 : Debug: Exec-Program: returned: 0 I don't see any difference between the scripts (except one is working and the other one not).... Please, advise me... Many Thanks