| slovo | definícia |
firewall
(encz) | firewall,firewall n: Zdeněk Brož |
firewall
(encz) | firewall,programová ochrana serveru Zdeněk Brož |
firewall
(encz) | firewall,stěna proti ohni Zdeněk Brož |
firewall
(czen) | firewall,firewalln: Zdeněk Brož |
firewall
(wn) | firewall
n 1: (colloquial) the application of maximum thrust; "he moved
the throttle to the firewall"
2: (computing) a security system consisting of a combination of
hardware and software that limits the exposure of a computer
or computer network to attack from crackers; commonly used on
local area networks that are connected to the internet
3: a fireproof (or fire-resistant) wall designed to prevent the
spread of fire through a building or a vehicle |
firewall
(foldoc) | firewall
A dedicated gateway server with
special security precautions on it, used to service external
connections (typically from the public Internet) and to
protect servers and networks hidden behind it from crackers.
As well as filtering incoming traffic, a firewall should also
filter outgoing traffic ("egress filtering") to avoid the
embarrassment or data leaks that could be caused if the
machine is compromised.
A firewall may be a separate hardware unit, possibly a
dedicated network appliance, or it may be implemented entirely
in software, possibly running on a virtual machine.
The typical hardware firewall is an inexpensive
microprocessor-based Unix machine with no critical data,
with 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.
The type of network and security environment of a firewall machine
is often called a De-Militarised Zone (DMZ). It may contain
other servers such as e-mail servers or proxy gateways -
machines that need to be publicly accessible but also need some
access to internal systems.
Also known as a (Venus) flytrap after the insect-eating plant.
(2014-07-15)
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| | podobné slovo | definícia |
firewall code
(foldoc) | firewall code
Code designed to limit adverse effects of bugs
or bad input.
The term may also refer to user interface design intended to
steer the user away from potentially harmful actions, e.g.
burying the function to delete your account at the bottom of
the "Advanced" options.
Another example is a sanity check inserted to catch a {can't
happen} error. When fixing a bug, you might also insert
firewall code which would have prevented the bug from doing
any damage, in case something similar ever happens.
[Jargon File]
(2020-06-25)
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firewall machine
(foldoc) | firewall machine
flytrap
Venus flytrap
A network firewall implemented as a
separate piece of hardware or a virtual machine.
(2020-06-25)
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firewall code
(jargon) | firewall code
n.
1. The code you put in a system (say, a telephone switch) to make sure that
the users can't do any damage. Since users always want to be able to do
everything but never want to suffer for any mistakes, the construction of a
firewall is a question not only of defensive coding but also of interface
presentation, so that users don't even get curious about those corners of a
system where they can burn themselves.
2. Any sanity check inserted to catch a can't happen error. Wise
programmers often change code to fix a bug twice: once to fix the bug, and
once to insert a firewall which would have arrested the bug before it did
quite as much damage.
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firewall machine
(jargon) | firewall machine
n.
A dedicated gateway machine with special security precautions on it, used
to service outside network 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 micro-based Unix
box kept clean of critical data, with a bunch of 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,
callback, and even a complete iron box keyable to particular incoming IDs
or activity patterns. Syn. flytrap, Venus flytrap. See also {wild side
}.
[When first coined in the mid-1980s this term was pure jargon. Now (1999)
it is techspeak, and has been retained only as an example of uptake —ESR]
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