Most small firms in Nigeria run their IT setup for months, or even years, with no real check on how safe it truly is. This gap can leave real risk sitting in plain sight, unseen until it is far too late.

A network security audit is the fix for this gap. It is a clear, step-by-step check of your whole IT setup, built to find weak spots before a hacker does.

This guide walks you through running your own audit, even with a small team and a tight budget. Lagos Data School built this same process into our hands-on cyber course, so let’s walk through it now.

 

What Is a Network Security Audit?

A network security audit is a comprehensive review of your firm’s IT infrastructure, aimed at identifying vulnerabilities, gaps, and risks. It looks at your gear, your software, your rules, and even how your staff uses your systems each day.

Think of it like a health check at the doctor. Even if you feel fine, a check can catch small issues before they grow into big, costly ones. A security audit works the same way for your network.

Many firms wait until after a breach to run their first real audit. But the smart move is to run one before trouble hits, not after the damage is done.

 

Why Small Businesses in Nigeria Need Regular Audits

Many small firms wrongly think hackers only target big banks or large firms. But in truth, small firms are often seen as easier targets, since they tend to have weaker defenses in place.

Furthermore, a single breach can hit a small firm far harder than a large one, since small firms rarely have the funds to bounce back fast from a major loss. Also, more clients now ask small firms about their safety steps before they agree to work together.

So a regular audit is not just a tech task; it is a real step toward keeping your firm alive and trusted in a tough, fast-moving market.

 

Step-by-Step Guide to a Network Security Audit

Here is the clear, step-by-step plan that Lagos Data School teaches for running your own audit, even as a small firm with limited staff.

Step 1: Define the Scope of Your Audit

First, decide what your audit will cover. Will it check your whole network, or just one key part, like your client data store? Setting clear limits up front helps keep your audit on track and easy to manage.

Step 2: List All Your Assets

Next, write down every device, server, and tool your firm uses. This list should cover laptops, phones, routers, cloud tools, and any software that holds firm or client data.

You can not guard what you do not know you have. So this step, though simple, often reveals gear or tools that staff use without IT’s full knowledge.

Step 3: Check Your Firewall and Network Setup

Review your firewall rules to confirm they still make sense. Look for old rules tied to staff who have left, or tools no longer in use. A firewall full of outdated rules can hide real gaps from view.

Step 4: Review User Access and Passwords

Check who has access to what within your systems. Ask if each staff member truly needs the level of access they currently hold, or if it should be cut back.

Also, check your password rules. Weak or shared passwords remain one of the most common ways that hackers break into small firms with ease.

Step 5: Check for Missing Software Updates

Outdated software often carries known flaws that hackers can use to break in. So check that all your software, from your router’s firmware to your office apps, runs on its latest version.

Step 6: Test Your Wi-Fi Security

Confirm your office Wi-Fi uses a strong lock type, like WPA3 or WPA2, and that your password is strong. Also, confirm that guest devices sit on a separate network from your main staff systems.

Step 7: Review Your Backup Systems

Check that your firm backs up key data on a regular plan, and that those backups actually work when tested. A backup that fails to restore properly gives you false comfort, not real safety.

Step 8: Look for Signs of Past Breaches

Check your logs, where they exist, for any signs of past odd activity. This step can reveal a breach that went unnoticed at the time it happened, which is more common than most firms realize.

Step 9: Test Your Staff’s Security Awareness

Run a simple test, such as a mock phishing email, to see how staff respond. This step often reveals more risk than any single piece of software ever could.

Step 10: Document Your Findings and Build an Action Plan

Write down every issue you find, no matter how small it may seem. Then, rank each one by how serious it is, and build a clear plan for who will fix what, and by when.

 

Tools That Help With a Small Business Audit

You do not need a huge budget to run a solid audit. Many free or low-cost tools can support each step of the process.

• Wireshark for a close look at your live network traffic
• Nmap for scanning your network to find open, unguarded ports
• A password manager for checking and improving staff password habits
• A free phishing test service for checking staff awareness in a safe way

Lagos Data School trains students to use tools like these directly within our hands-on labs, so graduates can run a real audit from day one in their first job.

 

How Often Should a Small Business Run an Audit?

There is no single right answer, since it depends on your firm’s size and risk level. However, Lagos Data School suggests a clear, simple rule for most small Nigerian firms.

Run a full, deep audit once a year, at a minimum. Run a smaller, lighter check every quarter, to catch any fast-changing risks between your full audits.

Also, run an extra audit any time something major changes, a new office, a new core tool, or a big rise in staff count. Change often brings new risk that an old audit would not have caught.

 

What to Do With Your Audit Results

Finding issues is only half the job. The real value comes from what you do next with what you have found.

First, fix the most serious issues first, not the easiest ones. A small, simple fix can wait if a much larger risk sits unattended nearby.

Next, assign clear owners to each fix, with a real deadline attached. An issue with no owner and no date often never gets fixed at all.

Finally, keep a written record of each audit and its results over time. This record helps you track real progress, and it can also prove useful if a client or partner ever asks about your firm’s safety history.

 

Common Mistakes Small Firms Make During Audits

Even well-meant audits can fall short if a few common mistakes creep in. Here is what Lagos Data School warns students to watch for.

Treating the Audit as a One-Time Event

Some firms run one audit, fix a few issues, then never look again. But threats change fast, so a single audit can not protect you forever. Build audits into a regular, repeat habit instead.

Ignoring Small Issues

A small gap may seem harmless on its own, but a hacker often chains many small gaps together to cause real harm. So do not skip a fix just because the issue seems minor at first glance.

Skipping Staff in the Process

Some audits focus only on tools and gear, while staff habits go unchecked. But staff actions cause a huge share of real breaches. So always include a real check on staff habits in your audit.

 

Building a Culture of Regular Security Checks

Beyond the audit steps themselves, the real goal is to build a firm-wide habit of care around safety. This means talking about safety in normal team meetings, not just during a yearly review.

It also means making it easy and safe for staff to report odd activity, without fear of blame. Often, a staff member spots something odd well before any tool does but only if they feel free to speak up.

Lagos Data School works to instill this exact mindset in every student, since strong tools matter less without a strong, alert team standing behind them.

 

Recommended External Resource

For an official audit framework, visit the NIST Cybersecurity Framework guide: https://www.nist.gov/cyberframework

 

Should You Hire an Outside Firm for Your Audit?

Some small firms choose to run their own audit in-house, while others bring in an outside firm to do the work for them. Both paths have real merit, depending on your own firm’s needs and budget.

Running your own audit costs less and helps your in-house team build real skill over time. This route suits firms with at least one staff member who has some grasp of IT and security basics already in place.

Hiring an outside firm often costs more, but it brings a fresh, outside view that may catch things your own team has grown too used to seeing each day. An outside firm also tends to have deeper tools and more hands-on field experience across many different firms.

Many small Nigerian firms choose a mixed route. They run light, in-house checks each quarter, then bring in an outside firm once a year for a deeper, more thorough review. Lagos Data School trains students to perform both kinds of audits, so they can serve firms either as an in-house hire or as an outside expert later in their career.

 

Preparing Your Team for the Audit Process

An audit goes far more smoothly when your whole team understands why it is happening and what role they play in it. So take time to explain the process to staff before you begin.

Make clear that the goal is to find and fix gaps, not to place blame on any one staff member for past mistakes. Staff who fear blame often hide facts or stay quiet, which can hide real risk from view during the audit.

Also, set clear timelines so staff know what is expected of them and by when. A vague, open-ended audit tends to drag on far longer than one with clear, firm deadlines attached to each step.

Lagos Data School stresses this human side of the audit process just as much as the technical steps, since even the best checklist fails if the people involved do not feel free to speak up and engage with it fully.

 

A Quick Audit Readiness Self-Check

Before you start your audit, run through this short self-check to see how ready your firm truly is.

• Do you have a full, written list of all your firm’s devices and tools?
• Do you know who has access to your most sensitive data right now?
• Have you tested a backup restore within the past six months?
• Does your team know how to spot and report a phishing attempt?
• Do you have a clear plan for who fixes issues once the audit ends?

If you answered no to two or more of these, your firm has real, useful work to do before the next audit cycle begins. Lagos Data School built this self-check from real gaps we see most often when we train new IT staff and small firm owners.

 

About Lagos Data School

Lagos Data School is Nigeria’s top school for cybersecurity, data science, cloud, and analytics. Every idea in this guide is part of our hands-on course.

Our teachers are real security pros, not just classroom staff. So you learn from people who guard live networks every day.

We run classes on weekdays, weekends, and online. So no matter your time, we have a slot for you. Beyond skills, we also give you a real certificate and links to job partners.

Visit Lagos Data School today to view our courses and join the next class.

Find your gaps before hackers do. Train with Lagos Data School.