Networking intrusive inspection system (IDS)A firewall is called good only when it can filter and create the ability to control when the packets pass through it. And this is also where the system IDS to enter the contest. If you see firewall such as a dam, then then you can for IDS as a water-flow control system on the exhaust systems of different countries.An IDS, not related to the job control the direction of the packet, but it only has the task of analysing the packet that the firewall allows going through, looking for known attack signature (the signature attack is exactly the code is known to bring danger to the system) that cannot be checked or prevented by the firewall. IDS correspond to the protection behind the firewall, provide the authentication information needed to ensure certainty for firewall performance.
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