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Host-Based IDSA host-based IDS (HIDS) resides on a particular computer or server and monitors activity only on that system. HIDS also called as system integrity verifiers as they benchmark and monitor the status of key system files and detect when intruder creates, modifies, or deletes files. It is efficient enough to monitor system configuration databases. Most of the HIDSs work on principle of configuration or change in management. The HIDS examines the files and logs for predefined events. The advantage of HIDS over NIDS is which it can be installed usually so that it can access information encrypted when traveling over network.Advantages and Disadvantages of HIDSsAdvantages-Can detect local events on host systems and detect attacks that may elude a network based IDS- Functions on host system, where encrypted traffic will have been decrypted and is available for processing.-Not affected by use of switched network protocols-Can detect inconsistencies in how applications and systems programs were used by examining records stored in the audit logs.Disadvantages-Pose more management issues-Vulnerable both to direct attacks and attacks against host operating system-Does not detect multi host scanning, nor scanning of non-host network devices-Susceptible to some denial of service attacks-Can use large amounts of disk space-Can inflict a performance overhead on its host systems
Many applications are vulnerable to intrusion attacks and can provide misleading reports about misbehaving nodes. Some of the mechanisms under such a category include the Bayesian
IP DATAGRAM SIZE: Datagrams may have different sizes i.e. Header area is generally fixed (20 octets) but can have various options. Data area may contain between 1 octet and 6
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Title: Perimeter Network Security System Outline Requirements The University is based in Glasgow, and provides higher education services to its students and staff. It is loc
What are the main differences between TCP/IP vs OSI?
QUESTION A small ISP requests your help. The technicians report that they have had no downstream access to the Internet. They believe the problem lies with their access provide
IDS RESPONSE BEHAVIOR Once IDS detects an anomalous network situation, it has a number of options. IDS responses to external stimulation can be classified as active or passive.
Question: (a) Your office administrator is being trained to take server backups. Which authorization model could be ideal for this situation: MAC, DAC or RBAC? Justify your a
Question: (a) Give 2 benefits of using IPsec. (b) IPSec uses two protocol for security: Authentication Header protocol (AH) and the Encapsulated Security Header Protocol (
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