“shou Companies Use Ids To Secure Their Networks?
Organisations are more concerned about computer security, as most information now is stored in databases, and most systems are connected to the Internet. Use of Intrusion Detection Systems (IDS) is one of the factors companies should consider when planning their information security policy. IDS is important to protect sensitive information, to meet laws and regulations and to prevent economic loss, although in some cases IDS implementation is no economically viable. To be able to determine if an implementation of an IDS is necessary some factors must be taken into consideration, such as advantages and disadvantages, economy, laws and regulations.
The basics of Intrusion Detection (IDS) and Intrusion Prevention (IPS) systems are essential to determine. A definition of an IDS is “the tools, methods, and resources to help identify, assess and report unauthorized or unapproved network activity” (Endorf, Schultz and Mellander, 2004, p. 4). There are three types of IDS, each of which functions differently, namely host-based IDS (HIDS), network-based IDS (NIDS) and hybrids. HIDS is software that scans all resources on a host for activity, and then compares against known threats. NIDS analyzes network packets on a network segment and either compare against known threats or analyze for patterns of malicious behaviour. A hybrid IDS combines these two methods (Endorf, Schultz and Mellander, 2004, p. 7). Two different analysis methods are used; rule-based detection analyses based on signatures, like virus scanning, and profile-based detection looks for abnormal data patterns (Endorf, Schultz and Mellander, 2004, pp. 16-17). Larger companies with sensitive information to protect should use hybrids to protect the network and those servers containing sensitive information. Ortega (2006, p. 6) states that signature-based solutions will not work for defending sensitive information, because hackers knows how to conduct new types of attacks.
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