At a time when the size of distributed denial-of-service attacks has reached unprecedented levels, researchers have found a new attack technique in the wild that allows a single laptop to take down ...

Researchers say BlackNurse attacks are low bandwidth (18Mbps) and can still knock offline many of today’s firewalls. A type of denial of service attack relevant in the 1990s has resurfaced with ...

Hi everyone.<BR><BR>Recently, my firewall was caught with a bug that cause it to blacklist itself: when it encountered a packet with the "No not fragment" flag set too big to fit on the next hop, it ...

Allow SMTP messaging services for both Internet and internal users to pass through your firewall--this is required for you to receive and send e-mail. ICMP services should be turned off to prevent ...