Intrusion Detection Systems: Everything you need to know
The cyber-threats on the web continue to be increasingly sophisticated. Sophisticated attack techniques appear by the second with the purpose of attacking our data and equipment. Powerful attacks such as denial-of-service attempts, Pishing, Man in the middle (MitM), REPLAY attacks, authentication attacks, malicious code execution, buffer overflow attacks, backdoors are among the most popular.
We cannot deny that firewalls are an invaluable tool for shielding the security of our networks. These systems allow, encrypt, decrypt and limit the flow of data according to the security policies you set. But keep in mind that a firewall cannot offer security against attacks that occur within the network and even they do not offer all the security when it comes to threats that use traffic accepted by the firewall.
At this point you should know that, in addition to a firewall, it is essential to have Intrusion Detection Systems (IDS), a powerful prevention and warning tool that detects possible intrusions inside and outside the system.
Undoubtedly, these two technologies together consolidate to great levels the computer security. On the one hand, firewalls examine external attacks and also block access between networks to prevent threats. Meanwhile, Intrusion Detection Systems not only detect the anomalies that occur externally and internally in the network, but also emit an alert signal to prevent the operator. This is possible because IDSs use thermal sensors (such as sniffers) capable of locating any type of eventuality.
Intrusion Detection Systems work like “security cameras” and allow the data packages to be examined for irregularities. However, SDN offers a number of responses to any type of contingency, but does not stop the threats themselves; it only stops those that operate together in a gateway device with firewall functionality. In such cases, as the point where the packets must necessarily pass through, they can be blocked before accessing the network.
Other reasons to have an IDS
Intrusion Detection Systems provide valuable reporting on the status of traffic on our networks. With this technology it is possible to identify where the attacks that attempt to harm our system come from, detect unknown and unexpected intrusions and review the system configurations.
One of the most interesting aspects of IDS operation is its ability to make the job more complicated for intruders. These systems erase all evidence of the attacker’s activities in case other similar attacks occur.