firewall machine - meaning and definition. What is firewall machine
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What (who) is firewall machine - definition

FIREWALL USUALLY DESIGNED TO PROTECT A SINGLE PERSONAL COMPUTER
Personal Firewall; Desktop firewall
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firewall machine      
<networking> A dedicated gateway machine with special security precautions on it, used to service outside network, especially Internet, connections and dial-in lines. The idea is to protect a cluster of more loosely administered machines hidden behind it from crackers. The typical firewall is an inexpensive microprocessor-based Unix machine with no critical data, with modems and public network ports on it, but just one carefully watched connection back to the rest of the cluster. The special precautions may include threat monitoring, call-back, and even a complete iron box keyable to particular incoming IDs or activity patterns. Firewalls often run proxy gateways. Synonym flytrap, Venus flytrap. (1997-06-08)
Application firewall         
A FORM OF FIREWALL THAT CONTROLS INPUT/OUTPUT OR SYSTEM CALLS OF AN APPLICATION OR SERVICE
Application layer firewalls; Application Layer Filtering; Application-layer firewall; Application-level firewall; Application level firewall; Database firewall; Application layer firewall; Transparent firewall
An application firewall is a form of firewall that controls input/output or system calls of an application or service. It operates by monitoring and blocking communications based on a configured policy, generally with predefined rule sets to choose from.
Next-generation firewall         
TERM
NGFW; Next-Generation Firewall; Draft:Redirect to New-Generation firewall
A next-generation firewall (NGFW) is a part of the third generation of firewall technology, combining a traditional firewall with other network device filtering functions, such as an application firewall using in-line deep packet inspection (DPI), an intrusion prevention system (IPS). Other techniques might also be employed, such as TLS/SSL encrypted traffic inspection, website filtering, QoS/bandwidth management, antivirus inspection and third-party identity management integration (i.

Wikipedia

Personal firewall

A personal firewall is an application which controls network traffic to and from a computer, permitting or denying communications based on a security policy. Typically it works as an application layer firewall.

A personal firewall differs from a conventional firewall in terms of scale. A personal firewall will usually protect only the computer on which it is installed, as compared to a conventional firewall which is normally installed on a designated interface between two or more networks, such as a router or proxy server. Hence, personal firewalls allow a security policy to be defined for individual computers, whereas a conventional firewall controls the policy between the networks that it connects.

The per-computer scope of personal firewalls is useful to protect machines that are moved across different networks. For example, a laptop computer may be used on a trusted intranet at a workplace where minimal protection is needed as a conventional firewall is already in place, and services that require open ports such as file and printer sharing are useful. The same laptop could be used at public Wi-Fi hotspots, where it may be necessary to decide the level of trust and reconfigure firewall settings to limit traffic to and from the computer. A firewall can be configured to allow different security policies for each network.

Unlike network firewalls, many personal firewalls are able to control network traffic allowed to programs on the secured computer. When an application attempts an outbound connection, the firewall may block it if blacklisted, or ask the user whether to blacklist it if it is not yet known. This protects against malware implemented as an executable program. Personal firewalls may also provide some level of intrusion detection, allowing the software to terminate or block connectivity where it suspects an intrusion is being attempted.