Layers of Security Many companies are vigilant about bolstering their IT security architecture. Unfortunately, many organizations view firewalls as the great panacea for corporate security woes they think that if they build a secure wall around the enterprise, it will be safe from attack. As e-business security failures attract public attention, intrusion detection is getting the attention of IT managers. Newer products have reactive capability as well, or the ability to neutralize an attack. Where firewalls leave off, IDS steps in.
Firewalls focus on entry policy, admissions, and denial of service.
By blocking out certain kinds of traffic, firewalls provide organizations a high level of security. However, although firewalls can check packets, the technology doesn't look inside the packet. Providing the next layer of security, IDS identifies threats as they exist in a system. Additionally, IDS solutions classify, determine harm, and react to threats based on security policies and rules. Twentieth Century's Uslan maintains that although he's concerned about outside hackers, the more important issue is inside problems.