Correct. The UDP state machine is based on "timers". -----Original Message----- From: netfilter-admin@xxxxxxxxxxxxxxxxxxx [mailto:netfilter-admin@xxxxxxxxxxxxxxxxxxx] On Behalf Of Eddahbi Karim Sent: Thursday, December 25, 2003 7:15 AM To: netfilter@xxxxxxxxxxxxxxxxxxx Subject: How iptables know when an UDP connection is closed ? Hi, The question is in the topic, how iptables knows that a UDP connection is CLOSED ? Does the connection close only when there's a Timeout ? -- -- Eddahbi Karim Phone : (33) (0)6 61 30 57 77 France