Reactive Cybersecurity: How to Get it Right

Cyberattacks happen. What you do afterward can affect your cybersecurity posture for years to come. But it can also affect your ongoing success as a business, your good name and your compliance with the laws that govern your industry. You can only realize the full benefits of cybersecurity with the one-two punch of strong proactive and reactive cybersecurity.

Proactive Versus Reactive: It Takes Both

We detailed the proactive approach in a previous article. Next, explore what to do in the aftermath of an attack. 

Reactive cybersecurity is one of the most important elements in your cybersecurity strategy. It comes in four stages, and each is as vital as the others.

Contain the Breach

First, find out which servers and devices the attack affected, disable remote access to them and disconnect them — or disconnect all systems if you’re not exactly sure. 

Next, change all passwords in the organization right away, making sure your new passwords are strong.

Keep your firewall settings in place. But don’t delete anything until you have concluded your investigation into the attack. After all, you need to preserve all evidence.

Last but not least, install security updates on all systems that you can update. 


At the next stage, investigate the attack and find out how widespread it was, who might be involved and what actions by employees or security tools enabled it to occur. Figure out the timeline, and when the attack began. (After all, it could be months ago). Find out what the attackers removed from your systems. Determine ..

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