Intrusion Detection vs. Intrusion Prevention

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I think you’ll agree with me when I say that the words “database” and “parasitism” are not words you want to hear in the same sentence. Databases contain important information that must be kept private for our companies and customers – we cannot have criminals exploiting loopholes in our security and gain access to this information.

Fortunately, we can take steps to prevent hackers from entering and catch them if they manage to slip in anyway. Let’s learn about these methods and how we can use them well to protect our valuable data. We’ll explore two systems – IPS and IDS – and take a look at how they compare and what you should consider when implementing them.

Part 1: Intrusion Prevention System (IPS)

IPS stands for Intrusion Prevention System. The primary goal of this system, as its name suggests, is to prevent intrusions into your applications, networks, and other topics.

Think of IPS as a heavily secured fortress with many skilled security guards to protect it. Inside this castle is your application, your database, or any system that handles data. In this case, the security guards guarding the perimeter of the fort usually have a job to do – turn the columns and check the surroundings to make sure only certain people can get in and out of the fort. So the security guards will be active, even if at times this work may seem insignificant.

How does IPS work?

The IPS is usually put behind a Web Application Firewall (WAF), or a similar procedure because IPS acts as an “identifier”: it identifies suspicious activity, and once it identifies it as a threat, it notifies the people responsible and flags the threat as “acting on “. For example, Palo Alto Networks has a highly configurable IPS that effectively manages anomalous traffic.

Once a threat has been successfully flagged as “acted upon,” it is up to the responsible administrator to decide what to do next. Usually, officials crush the threat or report the flaw to the security engineers responsible and let them fix it. Once the bug is resolved, the app can resume working as intended – most likely, your customers won’t even notice that something has happened. Fabulous. correct?

Types of intrusion prevention systems

Usually, intrusion prevention systems are categorized into types, and each of them may be useful for a specific purpose:

  1. Host-based intrusion prevention systems typically defend a single server by blocking IP addresses that make multiple SSH attempts.
  2. Network-based IPS is based on information collected by deploying devices that deal with the monitoring and analysis of traffic flowing through a particular network.
  3. Wireless IPS is mostly installed with Wi-Fi networks. It helps in monitoring a particular Wi-Fi network for unauthorized access to any Wi-Fi endpoint.
  4. Network Behavior IPS typically monitors the network to identify threats based on network behavior. Threats include applications that generate unusually high traffic.

There are costs associated with time as well. You see, people usually choose intrusion prevention systems based on what they need to protect.

Do you need IPS?

Now, you might have another question – do you need IPS at all? You may need IPS if:

  1. You have security engineers who frequently remind you that your networks, web applications, or other systems that handle information are not adequately protected. This may also come in the form of white hat hackers emailing your company or security audit program poor scores.
  2. I’ve already tried similar solutions (intrusion detection systems, web application firewalls, etc.) and would like to try something else in the security space as well because the current solutions are not user friendly.
  3. You may have experienced a data breach and are wondering how best to protect your networks, apps, or similar things to prevent a data breach in the future.

Part 2: Intrusion Detection System (IDS)

IDS stands for “Intrusion Detection System”. The primary goal of this system is to detect any kind of intrusion and leave more action to your imagination.

In its simplest form, IDS is a system that works to detect attacks targeting different types of applications. Companies usually turn to IDS as soon as they feel a particular security threat. They may feel that an intrusion detection system will serve them better than pre-hiring security-related personnel as employees need to be briefed and trained.

People will turn to IDS when they need to stop an attack directed against an app. Since systems are (usually) better at detecting things than humans, they can enhance your ability to detect attacks. Or at least help you know what to ask for when hiring information security related ninja experts.

How does the IDS system work?

Most intrusion detection systems work similarly to web application firewalls. They hold either:

  1. Flags (called “signatures”) of known attack vectors.
  2. Suspicious and potentially harmful activity by looking at patterns of deviation from “normal” traffic.

IDS typically looks for anomalies in traffic, packets, or behavior that matches certain malware-related patterns. If your network is on Tailscale for example, you can send its logs to IDS for analysis. Threat detection in intrusion detection systems can usually be categorized into two types, namely:

  1. signature-based detection.
  2. behavior-based detection.

As its name suggests, signature-based detection detects all malicious behavior by looking at the ‘signatures’ of malicious activity. In contrast, behavior-based detection goes a step further and attempts to identify malicious attacks by looking at their history. In either method, IDS determines what each specific process is trying to accomplish in your system, and if it thinks the result is malicious, it blocks the request altogether. Crowdstrike and Ossec are two security companies and here is a comparable intrusion detection software.

To interact with IDS in your daily evolution, you can set up primary hosts on clouds that give you a great combination of access and security.

IDS vs IPS Technical Differences

Here is a quick look at some of the differences between the two systems:

  1. Intervention a statement Systems simply detect threats but leave all the action to whoever runs the detection system in the first place. Nothing will be done if the person running the system chooses to do nothing. On the other hand, if the person monitoring the system chooses to block everyone involved in the incident, everyone will be completely denied access to the system. In contrast, intrusion prevention systems detect and deter Threats targeting your applications. The way IPS prevents threats largely depends on how you configure them.
  2. Ironically, the intrusion prevention system may be more “intrusive”. At least in the sense that it may receive real-time traffic from your app so that it can prevent potential threats. On the other hand, an IDS system will simply receive “stale” (not real-time) traffic instead.
  3. These systems require upgrades from time to time, but IPS must be upgraded frequently due to the changing nature of threats.
  4. Placement – IDS must be placed after Install the firewall, while IPS works fine even when placed Before He. She. The primary reason behind this is that the intrusion detection system, in this case, will detect threats that have bypassed the firewall – the ones it has stopped will not be blocked.
  5. Both IDS and IPS can detect zero-day attacks (attacks that are not yet recognized), but only IPS will be able to prevent them.

If you are serious about protecting your systems, IDS or IPS will get you far. Combine both of them with a firewall, and you will have a very powerful line of defense.


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