Network Security One of the current trends of network security is the growing emphasis on intrusion detection. Intrusion detection tools protect against unauthorized access to networks. If anything out of the ordinary is found, the program can notify the appropriate network administrator via electronic mail, pager, or other messaging tools.
Some programs can even reconfigure the network or shut down a port in order to counter an attack.
The sensors record all of these events in a log. Information from the log is put into a database and sorted to track trends and generate reports. Most intrusion tools cannot read encrypted or fragmented traffic so an attack disguised either of these ways could sneak past the intrusion detection system. Systems do not work well, and detect very few intrusions on high-traffic networks. Even if a company s detection security department is well skilled, these problems are nearly impossible to avoid.