Monday, April 2, 2012

Intrusion Detection System Vital Tool For Computer Security

Worried about intruders from attacking network system? Do not surround with a cloud of tension, but are looking for an intrusion detection software (IDS). Electronic attacks can impair the functioning of systems and networks. IDS is a must have tool, especially if you plan to seriously in-depth computer security. Anti-virus scanners have to stop known viruses and trojans, firewalls and port intruders. But what about activities that take place in the network packets? The IDS can detect if the port 80 traffic is an Internet application or an IM file transfer. Instead, scanners and firewalls can not keep buffer overflow attack or can not do on the most recent SQL injection attack. Advanced high-end IDS is capable of falling into the package before the damage is distributed. It will also change or modify the security setting disregard of the possibilities that can cause harm to the network.

Intrusion detection system can be divided into one of the following:

Misuse detection and anomaly detection
In the detection of abuse, investigate IDS systems integrated information and then make a comparison with the large databases of attack signatures. Basically it looks for a specific attack that has already taken place. Software to detect a virus detection system checks the database of attack signatures and compares the packet against them. In anomaly detection, the system administrator creates the baseline, or normal, the load of network traffic, protocol, and typical packet size. The anomaly detector checks the network segments to their normal state to the baseline and to compare the search for anomalies.

Network based versus host based system
Network system, in this intrusion detection system examines the individual packets transmitted through the network. All malicious packets that a firewall is not able to recognize, are filtered through them and ensure network security. A host-based view of the system on the computer activities of individuals or of the host.

Passive system vs. reactive system
In a passive system is the network security by the potential breach of security, logging information and send alerts done. In a reactive system suspicious activity is detected by the disconnection of a user or by reprogramming the firewall and network traffic stops of suspected source.

Firewall and IDS Security are on the Internet regarding safety. The difference lies in the methods of ensuring security. Research for firewall intrusion, so that they can be stopped from happening and maintains privacy by avoiding the access between two networks and to warn of an attack from within the network. On the contrary, to check the intrusion detection software to the suspects after the dissemination of the warning.

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