- Mar 15, 2011
- 13,070
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From the perspective of ordinary users firewall, of course, is the second largest after the anti-virus protection component of a PC. Unfortunately, sources of information, according to which one could determine which of the firewalls on the market protects better, very little.
Let's first define some terminology and answer the question - what is a firewall? By definition, the Internet standard [RFC3511] (2003), a firewall - a system that implements the filtering of network packets according to specified rules in order to distinguish traffic between network segments.
But with the growth of malicious software and hacker attacks, the source of the problem of firewall is supplemented with new functional modules. Already virtually impossible to complete without a firewall module HIPS (system event monitoring, control, integrity, etc.).
The main task of a modern firewall - to block unauthorized network communication (the attacks), subdivided into internal and external. These include:
External attacks on secure firewall system:
initiated by hackers;
initiated by malicious code.
Unauthorized outgoing network connections:
initiated by untrusted applications (malware);
initiated applications whose network activity is expressly forbidden rules.
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