>> If the answer to the above is no, would the connection be >>considered as ESTABLISHED if the default behaviour of >>ip_conntrack was used? >what on earth do you mean by this statement? What I mean by this is that the when a protocol is unknown to the ip_conntrack module if you don't have or don't want to use helper conntrack modules like that for TCP or FTP), connection tracking adopts a default method for handling these packets. It resembles the handling of UDP packets. When this default behaviour is used, even a packet that is not the SYN packet is considered as NEW. A second packet in the reverse direction (reply packet) will set the connection state to ESTABLISHED. Many thx for the reply...pls do respond to what I've written. Warm regards, Visham