Hello Pascal, Thank you for your reply. I have no rules to drop packets in the INVALID state. I have added the rule now to block all packets with INVALID state and things seem to be fine. Thank you for your help. Dhyanesh Ramaiya -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html