Elements of Network Security - 1681 Words

Elements of Network Security Louis Kibby Network / Datacom I TCM 537 Mr. Stuart Sandler November 28, 2005 Elements of Network Security Introduction The primary objective of a network security system is to, in a cost effective manner, balance convenient access to legitimate users and inaccessibility to attackers. In a nutshell, the goal is to prevent connectivity to anyone intending to cause harm to the network. The harm to which this paper refers can come in the following forms: 1. Application-level security threats, such as e-mail viruses and attachments. 2. Threats to network infrastructure devices. 3. Theft of network connectivity services. 4. Unauthorized access from internal and external sources. 5. Denial of service attacks.†¦show more content†¦28, 2001). Because this is an automated system, it depends on a mechanical process of discerning what is good or bad. This at times can lead to false positives or negatives, or the blocking of a legitimate user and giving access to a system violator. This weakness in the Cisco IDS requires that an additional form of violation detection be used. In addition to the IDS, LADWP has a staff of technicians who provide continuous network monitoring. In addition to keeping track of the alarms detected by the IDS Director Platform, these technicians also use other tools to keep an eye on network traffic levels, as well as performing routine vulnerability probing. One key tool used is Lucents VitalSuite. This tool uses real-time event analysis, which helps to identify network resources that have exceeded acceptable levels. To properly use VitalSuite, the technicians establish what they believe to be normal network activity. This norm is then used as a baseline to help in the identification of any abnormal network traffic. Once the baseline is established, levels of severity are set. The levels are minor, major and critical, with critical meaning immediate action is required. The only time the system alarms is when a critical error is detected. During normal operations, the technicians monitor VitalSuites display, looking for unusual events. These events canShow MoreRelatedElements Of Network Security Essay1618 Words   |  7 PagesElements of Network Security Introduction The primary objective of a network security system is to, in a cost effective manner, balance convenient access to legitimate users and inaccessibility to attackers. In a nutshell, the goal is to prevent connectivity to anyone intending to cause harm to the network. The harm to which this paper refers can come in the following forms: 1. Application-level security threats, such as e-mail viruses and attachments. 2. Threats to network infrastructureRead MoreSecurity Is A Process Not Product1041 Words   |  5 PagesDr. Wang â€Å"Security is a process not product†. 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