What does -P represent from your iptable command >>>>> iptables -t filter -P INPUT DROP ? And thank you for the docu.link http://www.netfilter.org/documentation/HOWTO/packet-filtering-HOWTO-6.html I will try to understand first all the suggestion that you posted. Thanks, Milo ----- Original Message ----- From: <a.ledvinka@xxxxxxxxx> To: "testmail" <testmail@xxxxxxxxxxxxxxxx> Cc: "Netfilter" <netfilter@xxxxxxxxxxxxxxxxxxx> Sent: Thursday, December 02, 2004 04:00 PM Subject: Re: Iptables Problems > > # Set the default policy > > iptables -t filter -A INPUT -j DROP > iptables -t filter -P INPUT DROP