Introduction Internet security and privacy is an issue that is beginning to get the attention of almost all who use computers. Almost all attacks on computer networks can be prevented if system administrators take the appropriate steps to secure and monitor their networks. The process of preventing and detecting security breaches by monitoring user and application activity is known as intrusion detection. Intrusion detection is a proactive process that requires constant attention of system administrators. In order to remain secure, network systems must continually be probed for new security weaknesses.
Security is a process of staying informed.
The Internet is changing rapidly day by day. Businesses are expanding exponentially using the Internet as a resource. Because of its quick evolution, system monitoring and administration is becoming an endless task. Intrusion detection tools make it easier for administrators to keep a secure network environment. The vandals probing networks for security vulnerabilities may be curious teenagers, disgruntled employees, or corporate criminals from rival companies.