This project has two main components: a firewall that blocks or allows network traffic based on rules you set, and a packet sender that can send custom TCP and UDP packets. The firewall uses raw ...

Cisco firewalls had this pseudo-statefulness for a while, but I think it's been fixed now. <P>Ipf has nice stateful capabilities, and is a really nice firewall package in general.

A basic hardware firewall is little more than a filter, "accept this packet from this source to this destination on this port" or "deny this packet from this source to this destination on this port".

Hardware firewalls are integrated into the router that sits between a computer and an Internet modem. They typically use packet filtering, which means they scan packet headers to determine their ...

Stateless inspection firewalls are first generation firewall technology with basic filtering of packets as they travel between networked devices. They filter packets based on IP addresses, ports, and ...

Packet-filtering firewalls will check each data packet to make sure it has permission to pass through your network. While this remains the most common type of firewall, it was developed in the ...

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 ...