Firewalls are used to guard home networks as well as corporate networks. A standard firewall program or hardware device filters all data coming from the Internet to your network or computer system. Many types of firewall techniques will avert possibly unsafe data from getting through; intrusion detection is one of such technique which is available in many firewalls.
What is Intrusion Detection?
Intrusion detection is a highly developed feature of the firewall, and a lot of firewalls such as ICF are short of this feature. Intrusion detection systems (IDSs) can recognize attack signatures or patterns, cause alarms to aware the operations personnel, and cause the routers to cease the connection with the unreceptive sources.
These systems are also capable of preventing Denial of Service (DoS) attacks. A DoS attack takes place when a user sends remains of TCP requests that are masked as valid TCP requests, or else sends requests from an appalling IP source. The server will not be able to cater so many requests and shows a DoS message to valid site users. Intrusion Detection Systems executes the “prevent, detect, and react” approach to the network security by facilitating real-time monitoring of network traffic.
- Even though IDSs are essential to meet the security requirements for many organizations and some home users, the following are some drawbacks to its use that should be kept in mind while executing IDSs on your systems:
- The Intrusion Detection Systems are difficult to manage and may have an effect on the performance of your site.
- IDSs are expensive.
At times IDSs may mistake normal network traffic for a hostile attack by an attacker and, as a result generates unwanted alarms. These unnecessary warnings can be so recurrent that they cause operational personnel to overlook actual alarms.
There are numerous of third-party tools available for the intrusion detection. Intrusion Detection Systems are still in the course of action of being improved and developed.