How to create a virtual lab for step-by-step practice

Setting up a virtual lab at home or in the classroom has become one of the best ways to to practice safely, flexibly, and without relying on a physical laboratoryWhether you want to train in cybersecurity, electronics, programming, or simply experiment with simulators, today you have very powerful tools to recreate almost any technical scenario from your own computer.

Throughout this article you will see how to combine the proposals of the main academic and technical guides into a single approach: Cloud-based labs with Azure Lab Services, cybersecurity environments with virtual machines, electrical circuit simulators, and activities with household materials such as fruits and vegetablesThe idea is that you can design a complete, realistic virtual laboratory aligned with serious learning objectives, but without losing the practical and approachable touch.

What is a virtual laboratory and why is it worth setting one up?

A virtual laboratory is, essentially, a digital environment where you can to conduct practices, experiments or technical training without directly touching physical laboratory equipmentThis environment can be set up on virtual machines, software simulators, or cloud platforms that replicate the real infrastructure.

In the educational field, a virtual laboratory allows students to Apply the theoretical concepts from class to situations close to the real world.Working with tools similar to those used by professionals, but from a laptop at home. In cybersecurity, for example, attacks and defenses are simulated without risk to production systems.

A major advantage is that these laboratories can be designed with varying degrees of realism: from simple simulators that mimic the appearance of physical components up to advanced environments that virtually reproduce the electrical or network behavior measured with real instruments.

Furthermore, virtual laboratories allow something that is more limited in a physical laboratory: Try unusual configurations, explore bugs, break things, and backtrack as many times as necessary, promoting active learning where the student makes decisions and observes consequences.

Infrastructure options: cloud, virtual machines, and simulators

To create your virtual lab, you have several complementary options. Each one addresses different needs, but all can be combined to build a very complete ecosystem of practice:

• Managed cloud laboratories, such as Azure Lab Services.
• Local laboratories with virtual machines with VirtualBox or VMware.
• Specialized simulators for electrical circuits and electronics.
• Simple physics experiments supported by simulation (fruits, vegetables, multimeters).

Choosing one option or the other will depend on factors such as budget, the type of internship you want to do, the number of students, the level of control over the infrastructure and, above all, the learning experience you intend to achieve.

Virtual laboratory in the cloud with Azure Lab Services

If you need a scalable lab for an entire class or a large group, Azure Lab Services lets you Create and manage virtual machines in the cloud with the infrastructure already managed by Microsoft Azure.You focus on the teaching content and Azure takes care of the hardware.

Role and permissions required

To create labs within a lab plan, you need to have the role of Azure Lab Creator (RBAC)In many organizations, the creation and management of laboratory plans is divided among different teams (IT, faculty, coordination), so it is key that someone with appropriate permissions enables this role for you.

When you create a new lab plan, permissions may take a few minutes to propagate. If you receive the message when trying to create a lab... «You are not authorized to access this resource»A common solution is for the administrator to assign the lab creator role directly to resource group that contains the plan.

This adjustment is made from the Azure portal, by entering the corresponding resource group, and then in Access control (IAM), where a role assignment is added to the user or group that must create the labs.

Creation of a laboratory and its staff

A lab in Azure Lab Services is based on a template virtual machine From this machine, the machines that the students will use will then be cloned. All the VMs in the same lab share the same configuration, operating system, and installed software.

The typical workflow for creating the lab would be something like this, adapted to your context:

1. Log in to the Azure Lab Services web portal using your Azure subscription credentials.
2. Choose the option Create a laboratory within the desired laboratory plan.
3. On the new lab screen, indicate a descriptive name (for example, a programming or networking course), select the virtual machine image (for example, Windows 11 Pro) and choose the VM size (Small, Medium, etc.) according to CPU and memory requirements.
4. Establish the default credentials (username and password) that will be shared by all VMs in that lab.
5. Review and, if necessary, adjust the laboratory directives (maximum usage times, hour quotas, etc.).
6. Create the template virtual machinewhich will be the basis on which you will customize the environment.

Keep in mind that Not all VM sizes are available in all regions And the subscription has core limits. If you run out, you can request more capacity by following the Azure management guide.

Scheduling of times and usage fees

Once the lab is created, it's quite practical to define a schedule so that The virtual machines turn on and off automatically according to the course schedule. This way you don't depend on each student remembering to start and stop their own VM.

From the tab of Programme A scheduled event can be added to the lab:

• Select the event type (for example, standard).
• Choose start and end date and time.
• Define the time zone correct.
• Configure the recurrence, for example weekly for several months.
• Write down an internal description to remind you which practice or group each time block is for.

In addition, you can set hour quotas per userThis limits the maximum time each student can have their VM running outside of scheduled hours. This helps control costs while also allowing for independent practice.

Customization of the template machine

The great advantage of working with a template is that you only configure it once and All student VMs inherit exactly the same configurationTo customize it, the typical process is:

1. From section Template From the laboratory, start the template machine.
2. Connect via remote desktop (RDP) using the defined credentials.
3. Install and configure all the software needed for the course: editors (e.g., Visual Studio Code), compilers, analysis tools, additional browsers, etc.
4. Adjust operating system options, create shortcuts, configure local servers, or any other educational element.
5. Close the RDP session and stop the template machine.

This way, when you publish the lab, Azure will generate as many VMs as you specify, each one cloned from that standard configurationThis ensures that all students start from the same point. Furthermore, you can also automate VM startup to integrate them with course schedules or scripts.

Laboratory publication and invitation to users

While the lab is being prepared, only the staff exists. For students to have their machines, you must publish the lab indicating how many VMs you want to be created.

During the publication you define, for example, that they are created 3, 20 or 50 virtual machinesbased on the expected number of users. The process may take some time and can be monitored from the template tab. Once finished, in the view of Group of virtual machines You will see all the VMs, initially powered off and unassigned.

Access to the lab may be restricted. By default, only those on the user list can register. To add people, you have several options:

• Introduce manually enter email addresses.
• Upload a CSV file with student data.
• Sync with a Microsoft group Join (Azure Active Directory).

In small environments, it is common to add users manually from the tab. UsersEnter the emails (one per line or separated by semicolons), confirm, and they will immediately appear with a status Not registered.

From there, you can send everyone a automated invitation email with the lab registration link. Azure Lab Services generates and attaches this link to the email, and you can also copy it from the portal itself to distribute it through other channels. As users register, their status will change, and you'll see their names associated with the machines.

Regional limitations and error resolution

There is an important detail regarding the subscription: Azure limits the number of different regions in which you can have labs.If when creating a new lab you see an error such as "Subscription has labs in 2 regions, and the regional limit for this subscription is 2", it means you have already reached that limit.

In that scenario, you will only be able to create new labs in regions you're already using Or you'll need to request an increase in the region limit for your subscription from Microsoft. This is another aspect of cloud governance that should be considered when designing multiple courses or comprehensive training programs.

Cybersecurity lab with local virtual machines

Another very powerful way to practice, especially in cybersecurity, is to set up a completely local lab based on virtual machines that run on your own computerHere you are not dependent on the cloud and you have total control of the environment, ideal for sensitive testing.

Virtualization requirements and software

The first thing is to have a computer capable of supporting multiple VMs simultaneously: Plenty of RAM, a modern processor with virtualization support, and sufficient disk spaceThe more demanding the practices, the more resources you will need. It is also advisable to follow a Guide to enabling virtualization in BIOS and UEFI if your device does not have it enabled by default.

Regarding software, the most common options are:

• VirtualBox, free and multiplatform, widely used in educational environments.
• VMware Workstation Player, free for personal use, with good performance and support for many configurations.

Installing any of these programs is as simple as Download the installer from the official website and follow the wizard., accepting the components you need (network drivers, extensions, etc.).

Download operating systems for the lab

In a typical cybersecurity lab, several VMs with different roles are combined: attack machines, victim machines, and sometimes intermediary services such as web or database servers.

Some key distributions and environments to include are:

• Kali LinuxA Debian-based distribution specifically designed for penetration testing. It comes pre-installed with a multitude of security tools.
• Ubuntu Server or other server distribution: to simulate legitimate services (web, SSH, databases) on which to launch audits.
• MetasploitableA vulnerable virtual machine specifically designed to be attacked. It's a perfect target for practicing exploits without putting anything real at risk.

These images are downloaded from their official projects and can be used either in ISO format (for a clean install) or directly as preconfigured appliances In the case of Metasploitable, remember that if you're going to work with hazardous samples, it's advisable to consult guides on [the relevant topics]. testing malware on a virtual machine to minimize risks.

Creation and basic configuration of VMs

In VirtualBox, the process for creating a new virtual machine is very guided and quick. Generally, the flow is as follows:

1. Click on "New" and give the machine a name (for example, Kali, Ubuntu Server).
2. Select the type and version of the operating system (Linux, Debian, Ubuntu, etc.).
3. Assign RAM, balancing performance and available resources.
4. Create a virtual hard drive and define the required size.
5. Custom the NETWORK, for example in internal network mode, so that the VMs can see each other but remain isolated from the real network if you want maximum security.

Then all that's left is to mount the ISO of the desired operating system, boot the VM, and follow the installation wizard included with each distribution. In Kali Linux, for example, a few steps involving regional, user, and partitioning settings are completed, and it's ready in just a few minutes.

Key safety tools within the laboratory

One of the reasons Kali Linux is so popular is that It already comes with a huge collection of tools installed.This allows you to focus on the workflow and not the installation.

Some of the essential tools for practicing are:

• Nmap: network scanner to discover hosts, open ports, and active services.
• Wireshark: network traffic analyzer for capturing and studying packets at a low level.
• Metasploit Framework: platform for the development and execution of exploits, ideal for attacking Metasploitable.
• Burp Suite Community Edition: tool focused on security testing for web applications.

By combining these tools with vulnerable machines like Metasploitable, you will be able to Perform network scans, detect misconfigured services, launch controlled exploits, and analyze the generated trafficall within a closed and risk-free environment.

Design of cybersecurity practice scenarios

Once the VMs are set up, the interesting thing to do is create small scenarios with specific objectives. For example:

• Configure Ubuntu Server as test web server and simulate attacks from Kali.
• Use Metasploitable as victim team and practice phases of recognition, exploitation and post-exploitation.
• Capture traffic with Wireshark to understand What happens on the network when an exploit is executed? or an intensive scan is performed.

In this way, the laboratory goes beyond simply installing machines: it becomes a real training ground where you can test defense and attack techniques and strategiesalways within an ethical and academic framework.

Virtual laboratories and simulators for electronics and electrical circuits

In the field of electronics and circuits, the lack of a physical laboratory doesn't have to be a hindrance. Today, there are very powerful simulators that allow reproduce the behavior of resistors, sources, capacitors, or inductors almost as if you were at the practice table with a breadboard and a multimeter.

Types of simulators and their role in learning

We can distinguish, broadly speaking, three types of simulation experiences that are usually mentioned in academic literature:

• Simulators with visual representation very close to the physical componentsThey show switches, resistors, cables, and equipment as you would see them in reality, but with somewhat limited analysis functions.
• Environments based on textbook-type schematic diagramsThe appearance is more similar to the circuits depicted in the notes, but the simulation power (time analysis, parameterization, sweeps, etc.) is much greater.
• Hybrid platforms, in which the schemes are combined with virtual measuring and generating instruments that mimic real equipment (oscilloscopes, function generators, power supplies).

With these tools, activities can be designed where students not only connect components, but also simulate, measure and compare results between different configurations of the same circuit, encouraging discussion and reasoning.

Redesign of practical exercises using simulators and homemade materials

Faced with the impossibility of using the physical laboratory, many teachers have opted for Rethinking practices by combining online simulators with elements that anyone has at homeA very striking example is the use of fruits and vegetables as part of the circuit.

In these exercises, students first work in the simulator to solidify the concepts of Voltage, current, resistance, and Kirchhoff's laws in series and parallel configurations. Then, they apply that theory to a homemade setup using lemons, oranges, pears, or potatoes.

The role of the teacher in this approach is not so much that of a demonstrator, but rather that of a guide that poses challenges and helps interpret the measurements, encouraging the student to link what they see in the simulation with what they observe in real practice.

Electricity from fruits and vegetables: an unusual experience

Working with fruits and vegetables as a source of tension has an almost playful component, but behind it there is solid foundations of electrochemistryWhen copper and zinc electrodes are inserted into these elements, a small potential difference is generated associated with oxidation-reduction processes.

What's interesting for learning is that this setup, although improvised, lends itself to Measure the voltage with a multimeter, arrange the fruits in series or parallel, and check how the total voltage varies.This data can then be compared with what the simulators or formulas seen in class predict.

Because it's an uncommon practice, it often sparks a lot of curiosity. The students wonder How is it possible that something as commonplace as a potato can produce electricity?This opens the door to deeper discussions about the nature of current, potential difference, or the role of conductive materials and electrolytes.

Relationship with advanced concepts: Thevenin, power and meshes

From these simple setups, much more advanced topics can be addressed intuitively. For example, working with different configurations of fruit in series and parallel introduces ideas such as:

• Open circuit voltage: measure the voltage between terminals with no load connected.
• Short circuit currentWhat happens when the terminals are directly connected by a conductor?
• Thevenin's theorem and linearity: model the set of fruits plus resistors as an equivalent source.
• Maximum power transfer: observe which combination of load resistances makes the fruit deliver the most useful energy.

After experimenting and measuring, the students return to the simulator to recreate these same situations with ideal modelsThis allows them to compare results, correct conceptual errors, and strengthen both physical intuition and the ability to interpret graphs and measurements.

Impact on student motivation and active role

Experience gathered from projects of this type shows that by integrating simulation with homemade materials, it is possible to achieve a notable increase in motivation and in the real understanding of the conceptsStudents go from seeing theory as something abstract to perceiving it in phenomena that they can touch and measure.

In addition, they are encouraged to explain what they have done and observed. in their own wordsNot by simply copying definitions, which is key to consolidating learning. The teacher, in line with classic approaches to teaching, becomes above all a facilitator who poses challenges and helps to interpret results.

For these activities to work well, it's important to take care of logistical details: for example, that there are at least one multimeter per student or work pairand that the necessary materials (fruits, cables, electrodes) are indicated well in advance.

Taken together, combining virtual labs in the cloud with Azure, local cybersecurity environments based on virtual machines, electronics simulators, and home experiments with fruits and multimeters allows you to build a very rich, flexible and safe practice ecosystemWith good planning of permits, resources, and activities, you will have a virtual laboratory capable of admirably replacing many physical laboratory sessions, and even expanding them with scenarios that in reality would be too costly or risky.