F
Firewall: Basically, a firewall is a protective barrier between your computer, or internal network, and the outside world. Traffic into and out of the firewall is blocked or restricted as you choose. By blocking all unnecessary traffic and restricting other traffic to those protocols or individuals that need it you can greatly improve the security of your internal network.
Flaw: A flaw can refer to either a Bug, in the case of a flaw in the actual code of an application or operating system, or a flaw could be a vulnerability, in the case of a weakness or oversight in the overall network security defenses. Also Known As: Bug, Vulnerability
Forensic: Forensic is really a legal term. At its root it means something that is worthy of discussing in a court of law or that is related to the application of knowledge to a legal problem. It has been glorified in TV shows like CSI (Crime Scene Investigator) where they use various forms of chemical, pathological and other forensic sciences to gather information to determine how a crime occurred.
In computer terms, forensic is used to describe the science (or art) of extracting and gathering data from a computer to determine how an intrusion occurred, when it occurred and who the intruder was. Organizations that employ good security practices and maintain logs of network and file access are able to accomplish this much easier. But, with the right knowledge and the right tools forensic evidence can be extracted even from burned, water-logged or physically damaged computer systems. Also Known As: Computer Forensics, Network Forensics, Cyber Forensics
Freeware: Freeware is any program offered free of charge. Applications developed under the GPL, or open source, licensing agreements are also free, but freeware goes beyond just open source products to include products where the code itself might be protected, but the vendor still distributes the product at no cost.