I've not expected LnS to do filtering at such low level that my network card does not even receive unwanted packets! That's pretty good for me. Now when i try to sniff the network in promiscous mode with Ethereal i see no packets. So i have added the following rule to solve this problem: -- Permit all packets having IPs and MACs NOT EQUAL to mine in both SOURCE and DEST modes. -- Will this rule be secure? Can it be a hole for packet flood?