When deciding on a firewall implementation, most Unix-savvy administrators have usually chosen to use ipfilter on OpenBSD for their combination of capabilities and stability, as the capabilities of ...

Floodgate-Packet Filter is an embedded firewall from Icon Labs that allows networked devices to control the packets they process. It protects against potentially malicious attacks by filtering packets ...

Learn how firewalls have progressed from simple packet filtering to more sophisticated application-level filtering. Webopedia.com defines a firewall as “a system designed to prevent unauthorized ...

For those of you who have taken the plunge and upgraded from kernel 2.2.X (or even 2.0.X) to 2.4.X, congratulations. If, like a number of folks, you're running some form of firewall using either ...

In the last issue we started following a packet's journey from the wire up to the higher levels of network stack processing. We left the packet at the end of layer 3 processing, where IP has ...

Smoothwall is fine and dandy, except NAT is making it more trouble than it is worth.<P>I think my Red Hat install is kernal 2.4.<P>IP chains or IP tables.<P>What is the best way get a bare-bones ...

Is a firewall designed to catch spam, phishing emails etc., or is that the sole responsibility of a spam-filtering solution? I know with so-called UTM's the line between spam filter and firewall is ...