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1.4 security2 (Firewall (a firewall can't always help if: (individuals…
1.4 security2
Firewall
Examines the ‘traffic’ between the user’s computer (or internal network) and a public network (e.g. the internet)
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If the data fails the criteria, the firewall will block the ‘traffic’ and give the user (or network manager) a warning that there may be a security issue
Logging all incoming and outgoing ‘traffic’ to allow later interrogation by the user (or network manager)
Criteria can be set to prevent access to certain undesirable sites; the firewall can keep a list of all undesirable IP addresses
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Proxy Server
Allowing the internet ‘traffic’ to be filtered, they can block access to a website if necessary (similar type or reaction as a firewall)
By using the feature known as a CACHE, they can speed up access to information from a website; when the website is first visited, the home page is stored on the proxy server; when the user next visits the website, it now goes through the proxy server cache instead, giving much faster access
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