By Baumrucker C.T., Burton J.D., Dentler S.
Cisco structures, Inc. is the global chief in networking for the web, and its Intrusion Detection platforms line of goods is making in roads within the IDS marketplace section, with significant enhancements having occurred in February of 2003.A complete, up to date advisor to the and software program that contain the Cisco IDS. This booklet does greater than convey community engineers the right way to arrange and deal with this line of most sensible promoting items ... it walks them step-by-step via all of the goals of the Cisco safe Intrusion Detection process direction (and corresponding examination) that community engineers needs to go on their solution to attaining sought-after CCSP certification.
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Extra info for Cisco Security Professional's Guide to Secure Intrusion Detection Systems
NIDS can be hardware or software-based systems and, depending on the manufacturer of the system, can attach to various network mediums such as Ethernet, FDDI, and others. Oftentimes, NIDS have two network interfaces. One is used for listening to network conversations in promiscuous mode and the other is used for control and reporting. There are other means of supplying traffic to the IDS such as network taps. Cisco uses Switched Port Analyzer (SPAN) functionality to facilitate this capability on their network devices and, in some network equipment, includes NIDS components directly within the switch.
This means the use of documented and policy-directed software and human practices to ensure full awareness of potential security events. Software systems include well-tuned alert thresholds and logging mechanisms on the devices used to secure the network, such as firewalls, IDS, and AAA servers. It is absolutely critical that the reporting mechanisms are properly configured, however. Otherwise, security administrators will be overwhelmed with false-positive data and will be rendered ineffective in actual security situations.
It is at the point of detection that defined and practiced response measures must be implemented. Some responses may be automated, such as automatic shunning or filtering based on an IDS signature detection. Most responses will likely be manual, however. In these situations, administrators should have clear roles and responsibilities to mitigate the effects of an attack and alert upstream authorities, both inside and outside of the organization. Well-developed security policies are often helpful in delineating such roles, responsibilities, and actions.