Hopefully this primer on Stateful Packet-Filtering Firewalls and the Cisco PIX appliance has been helpful to you. This entry, along with my earlier entry is meant to focus your studies with regard to ...

Packet filtering is the process of passing or blocking data packets at a network interface by a firewall based on source and destination addresses, ports or protocols. The packet filter examines the ...

I'm tired of messing with FreeBSD an Linux trying to get a packet filtering firewall going. So until I figure out anything better, I'll give w2k a whirl. Microsoft has proxy server 2.0, but I'm ...

Understanding the stateful firewall vs stateless firewall distinction will help you decide on the best strategy for protecting your network. A stateful firewall keeps track of the state of network ...

Joel Snyder, Ph.D., is a senior IT consultant with 30 years of practice. An internationally recognized expert in the areas of security, messaging and networks, Dr. Snyder is a popular speaker and ...

A firewall is a network security device that prevents unauthorized access to a network by inspecting incoming and outgoing traffic using a set of predetermined security rules. Firewalls are used in ...

The humble firewall has come a long way since the packet-filtering days of yore. The first firewalls were developed by the Digital Equipment Corporation (DEC) back in the late 1980s. These early ...

Every self-respecting Linux guru should be familiar with firewalls and how to install and configure them. With this in mind, Linux gurus also should be curious about how firewalls function and how to ...

A software firewall is a standard tool for protecting computers from viruses and other malware. Some routers -- the device that carries packets of data between your network and the Internet -- offer ...

Firewalls monitor and regulate the data moving on and off your computer or network. They can keep criminals out while allowing legitimate network traffic in. Mac OS X comes with not one but two ...