IPS packet or content filter

Unanswered Question
Dec 3rd, 2007
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I'm a beginner with IPS, but I'm confused with the terms packet and content filter, when I'm looking in some documents on the web they are talking about packet filtering; statefull packet filtering etc ..., I see also the term content filtering, what is an IPS doing packet or content filtering ?

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attmidsteam Tue, 12/04/2007 - 10:40
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IDS/IPS devices are not firewalls and do not perform packet & content filtering (unless you stretch the definition and create a signature looking for specific keywords which blocks in-line).

Stateful means that the firewall tracks connections and allows reply traffic without checking an ACL:


Content filtering devices examine the data stream and make a determination if the content of the traffic is allowed (ex: blocking unsafe for work websites):



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