A computer device and/or software that separates a Local Area Network from a Wide Area Network and prevents unauthorized access to the Local Area Network through the use of electronic security mechanisms such as IP filtering, address remapping, etc.
Firewalls are systems designed to prevent unauthorized access to or from a private network. They are often used to prevent Internet users from accessing private networks connected to the Internet.
Special computers that are set up on a network to prevent entry to outsider/intruders from stealing or destroying confidential files
software programs that block unauthorized computer usage (p. 99)
are be a combination of hardware and software designed to prevent unauthorized access to the local LAN. In many cases they filter messages containing unwanted content.
Firewalls implement access controls based on the contents of the packets of data that are transmitted between two parties or devices on the network. By providing a single point of control for security on a network, firewalls can provide protection against attacks on individual protocols or applications, and can be effective in protecting against spoofing. Firewalls cannot provide privacy or authentication, nor can they protect a network against viruses.
a low security corporate backbone or perimeter network segment
Firewalls come in two varieties, hardware and software. A firewall is designed to sit between a PC or LAN (Local Area Network) network and the outside world (the internet) and intercept malicious content or potential hacking.
refers to both the software and hardware that stands between the Internet and a corporate network for security access control. (pp. 38, 152)
A firewall is a set of related programs, located at a network gateway server that protects the resources of a private network from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources its own users have access to.
A firewall is a security system installed on a network to restrict internal and external traffic. It can be used to block unauthorised users from access to private networks such as intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
are a security measure for computers that are permanently connected to the Internet. Companies often put up firewalls to stop people from gaining unauthorised access to their computers.
A software process for protecting undesired access to a network or access device.
A firewall is considered a first line of defense in protecting private information. In a networked environment, a firewall acts as a barrier between internal and external computers of the network controlling the flow of data between the two. Should a computer outside the firewall wish to communicate with a computer inside, it must communicate with the firewall, which then passes the data to the internal computer. This 2-step process protects internal networks from unauthorized access, reduces virus contamination and, sometimes, limits e-mail attachments from passing through the firewall (e.g. size restrictions)
This term refers to security measures designed to protect a networked system from unauthorised or unwelcome access.
A device that blocks unwanted access to a LAN or other network.
A combination of software and hardware designed to securely separate the Internet from internal computer systems and databases.
