The Linux kernel includes some of the most powerful and flexible firewall code in any general-purpose operating system. This code is called Netfilter, though most of us refer to it by the name of its ...

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 ...

In the world of the Linux operating system and open source software, the iptables firewall provides a full featured and stable packet filtering infrastructure. Commercial-grade capabilities such as ...

WHEN LOOKING for an effective, inexpensive firewall solution, Linux firewalls do not often enter into the picture unless someone involved in the security planning process is a Linux guru. With the ...

Linux's iptables allows powerful firewalls to be implemented at a minute fraction of the cost of many commercial offerings. Basic iptables firewalls are packet filters, which means they inspect the ...

I need to set up a firewall using iptables to restrict users by MAC address. I have one ethernet card on my server that is the 'outgoing' line and another that is the 'incoming' traffic from the ...

This chapter looks at the management of firewalls. From the perspective of the small office/home user, the firewall is a single device that protects the home network from malicious traffic—it keeps ...

Windows XP, left unpatched, is vulnerable to malware that can make it shrivel up and die within a few minutes of being connected to the Internet. Even after patching, Windows is still subject to virus ...

i am working thew the book, he recommends: drop all : for both incomming and out bound traffic, isn't this kinda of a real pain?(to block all OUTbound traffic) and what about dynamic ports and stuff?