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2\u3064\u306e\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30e2\u30c7\u30eb\uff1a\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/p>\n

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Unter der Bezeichnung Firewall versteht man einen Schutzwall, der Computer, Gateway-Server und dazu geh\u00f6rende Netzwerk-Einrichtungen vor externen Angriffen sch\u00fctzen soll. Wie eine „Brandschutzmauer“ (engl.: firewall) fungiert die Firewall als logische Pr\u00fcfeinrichtung die ein privates Netz vor dem \u00f6ffentlichen Netz sch\u00fctzt. W\u00e4re die Firewall nicht existent, so w\u00e4ren private Computer und Netzwerke den vielf\u00e4ltigen Attacken von au\u00dfen schutzlos ausgeliefert. Die Firewall ist kein Virenschutzprogramm. Ihre Funktion besteht nicht darin, Angriffe zu erkennen. Vielmehr ist sie konzipiert, Regeln der Netzwerk-Kommunikation konsequent umzusetzen. Alle eingehenden Datenpakete werden nach Firewall-Regeln untersucht, die unverd\u00e4chtigen d\u00fcrfen passieren. Bei fraglichen Datenpaketen erhalten Sie Mitteilung. Sie entscheiden. Mit ihrem Funktionsumfang darf die Firewall zweifelsohne als wichtiges Modul eines 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