My iptables script filters incoming packets. One filter is whether the destination address is MY machine. How do this if IP address changes uncontrollably like with DHCP?? Thanks, Chris -- _______________________________________ Dr. Christian Seberino SPAWAR Systems Center San Diego Code 2872 49258 Mills Street, Room 158 San Diego, CA 92152-5385 U.S.A. Phone: (619) 553-9973 Fax: (619) 553-6521 Email: seberino@xxxxxxxxxxxxxxx _______________________________________