How to plan IT security in your company?

Wondering how to plan IT security when there are hundreds of solutions, and you’re just a one-person IT department or a small team? You look at your own company infrastructure and think, “Where do I begin?”

The problem is that security architecture isn’t a single tool or a single recipe. Rather, it’s a map of connections, risk analyses, and the gradual implementation of solutions tailored to your needs.

Why is modern IT security so complex?

The cybersecurity market today resembles an oversized map full of acronyms, promises, and areas of expertise. NGFW, XDR, NAC, EDR, MDM, MFA, DNS Security, SIEM, SOAR… Each of these solutions promises protection. Each targets a specific part of the IT landscape. And as an IT manager or engineer, you’re one. Or two. And you have to manage it all.

Source: optiv.com

Today, a company’s infrastructure isn’t just a few computers. These include:

• mobile devices,
• remote users,
• cloud services,
• external partners,
• SaaS applications,
• ERP, and multiple touchpoints.

Each of these elements can be a gateway for threats ranging from ransomware and phishing to configuration errors.

IT risk analysis: the foundation of security planning

Before choosing tools, ask yourself what you’re protecting:

• Which systems are critical?
• What happens if access to the HR and payroll system is lost?
• How quickly do you need to restore data after an attack?
• What happens when a VPN stops working?

Let’s start simple. Take a look at your infrastructure and consider what could go wrong.

• WiFi access without user verification. Someone could come in with a laptop, connect, and scan the network from the inside.
• A remote employee connects via VPN from a private laptop without security.
• The switches in the server room have neither access control nor updates.
• Someone clicks a malicious link from an email, and the firewall won’t recognize the threat because the file was encrypted.

All this happens every day at hundreds of companies. These aren’t abstract scenarios from conferences. These are real-world situations we encounter with our clients – sometimes only after an incident.

The most common problems companies face when protecting their corporate networks

Many clients contact us after the fact. Managers say, “We had security, but we were still attacked.” However, upon analysis, it turns out that the security was deceptive. Firewalls remained unpatched, backups didn’t work, redundancy was lacking, and segmentation wasn’t implemented properly.

A story that teaches IT security planning

A few years ago, we were designing a backup and anti-malware protection infrastructure with a client. Everything was going according to plan until a lack of budget halted implementation. The project was suspended. A few months later, at 7:51 a.m., the phone rang: “We think we’ve been hacked.”

The rescue operation began. First an investigation, then computer isolation, and data recovery. We managed to restore about 80% of the resources. The rest was lost. A few days later, the budget for the backup array was released. The company realized the cost of a downed system.

How can you improve the security of the systems you already have?

You can start right here and now, even without a large budget.

Network Segmentation

Divide your network naturally: into departmental computers, printers, servers, etc., tag these segments with VLANs and intuitive addressing, and separate them with a next-generation firewall.

NAC – Network Access Control

Ensures that every user (even those with their own device) must “identify” before accessing the network. It introduces order and security.

Next Generation Firewall and DNS Security

A modern firewall not only blocks traffic but also understands context. DNS Security stops malware and phishing by blocking malicious redirects and prevents malicious domain resolution.

If you have an NGFW, learn what not to do with it.

XDR and Event Correlation

XDR combines data from multiple sources (endpoint, network, firewall, etc.) and helps you see incidents holistically, instead of reacting piecemeal. This is still an underappreciated security component.

MFA and MDM

With MFA, even the disclosure or theft of logins and passwords doesn’t cause a problem. A hacker will still be missing the second factor. Messages with a one-time code? A fingerprint? A physical key? The possibilities are endless. MDM, in turn, secures phones, which “take” your data outside the building every day.

A practical step-by-step action plan

Here’s a proven model for building a security architecture.

Why it’s worth working with an IT partner

IT security is too vast to attempt to cover everything alone. That’s why it’s worth working with a partner who understands how to structure security projects from a technical, process, budget, and organizational perspective.

👉 Want a practical plan tailored to your company?

Schedule a free consultation. We’ll discuss your security architecture without sales pitches or pressure. Find out how to start building solid protection, even if you’re a one-man army.

FAQ – Frequently Asked Questions about IT Security and Network Architecture