Corporate Wi-Fi: How to set it up correctly and securely

Wi-Fi in a business is not the same as Wi-Fi at home. A domestic router costing 1000 Kč will not cover an open-space for 30 people and certainly will not provide the security required by a business environment. Let us look at how to set up a business wireless network correctly.

Why a home router is not enough for a business

Home routers and access points are designed for 5-10 devices. In an office, it is common to connect 20, 50, or sometimes even more devices simultaneously, laptops, phones, tablets, printers. A home router cannot handle such a load: Wi-Fi starts dropping, speed decreases and the connection becomes unreliable.

Apart from performance, security is also important. A home router typically offers one network with a single password. In a business environment, you need to separate the employee network from the guest network, protect sensitive data and keep track of who is connected.

Enterprise access points vs consumer units

Corporate access points differ in several key areas:

• Capacity: They handle tens to hundreds of simultaneous connections without degradation.
• Central administration: All access points are controlled from a single location, changing a password or rules takes effect immediately across all of them.
• Roaming: Users move seamlessly between coverage points throughout the office without any dropouts.
• Safety: VLAN support, 802.1X authentication, WPA3 Enterprise.
• Monitoring: You can see who is connected, how much data they consume and where the problem areas are.

Among proven brands are Ubiquiti UniFi (excellent price/performance ratio for small businesses), MikroTik, Aruba and Cisco Meraki.

VLAN: Network segmentation is fundamental

VLAN (Virtual LAN) enables a single physical network to be divided into multiple logical segments. For business Wi-Fi, this means you can have:

• Employee network: access to internal systems, shared folders and printers.
• Hostouška network: access to the internet only, with no ability to view anything on the internal network.
• IoT site: for smart devices, cameras and sensors that have no place in the main network.

Even if a visitor discovers the password for the guest network, they cannot access your servers or shared files. These simple measures dramatically increase security.

Hostovská Street: Why and how

Every company receives visitors, clients, suppliers, couriers. They all want Wi-Fi. If you give them the password to your main network, you are potentially giving them access to your data.

Correctly configured guest network:

• It is completely separate from the internal network.
• It has a limited bandwidth so that guests do not take capacity away from employees.
• It may feature a simple access portal (captive portal) with terms of use.
• The password is changed regularly or a unique password is used for each guest.

WPA3: The latest security standard

WPA3 is the successor to WPA2 and brings significant security improvements. Key benefits:

• Protection against offline attacks: An attacker cannot capture traffic and then guess the password offline.
• Forward secrecy: Even if an attacker obtains the password, they cannot decrypt previously captured traffic.
• WPA3 Enterprise: 192-bit encryption for the most sensitive environments.

If your access points support WPA3, enable it. Most modern devices are compatible. For older devices, a transitional WPA2/WPA3 mode can be configured.

Correct coverage: Where to position access points

Poor coverage is the most common issue with corporate Wi-Fi networks. An access point in one corner of an office will not cover the other side of the room, let alone adjacent floors. Basic rules:

• Install access points on the ceiling or high on the wall: the signal spreads best from top to bottom.
• In an open-plan office, allow for one access point per 15-25 users.
• Concrete walls and metal structures significantly dampen the signal: take this into account.
• Before installation, a site survey will be carried out to identify any problem areas.

Practical recommendations for small companies

• Invest in at least two business access points. Even a small office benefits from redundancy.
• Separate employee and guest networks using VLANs. It is simple and effective.
• Regularly change passwords, ideally every month for the guest Wi-Fi network.
• Update the firmware of access points: security vulnerabilities also occur in network devices.
• Monitor network utilisation, if employees complain about slow Wi-Fi, correct configuration is often sufficient; no additional hardware is needed.

Summary

A correctly configured corporate Wi-Fi is not a luxury but the foundation of a productive and secure office. With enterprise access points, segregated networks and modern security, your employees will be satisfied and your data safe.