Setting up a local network between multiple computers without the need for unnecessary cables is a common challenge for home computer owners and small office owners. Instead of running wires throughout the entire apartment, modern technologies allow you to connect devices into a single infrastructure using a wireless protocol. IEEE 802.11This allows you to share files, play online games, or use a shared printer from anywhere in your apartment where there's a strong signal.
Many users mistakenly believe that having a WiFi router automatically creates a fully-fledged local network with shared access. In fact, the router only provides a physical connection, but the operating system requires additional configuration of sharing and security settings. Without proper configuration Windows or macOS may block incoming connections, considering them potentially dangerous from the external network.
In this article, we'll cover the setup process in detail, from selecting equipment to fine-tuning access rights. You'll learn how to avoid common mistakes that lead to slowdowns or data vulnerabilities. A properly configured network will operate reliably for years, requiring only minimal administrator attention.
Preparing equipment and selecting the operating mode
The first step toward creating a stable local network is to evaluate your existing equipment. The central element of the architecture will be a wireless router, which must support current communication standards. For comfortable handling of large amounts of data, it is desirable to have ports. Gigabit Ethernet and support for the 5 GHz range.
There are two main network deployment scenarios, and the choice between them depends on your goals. If you simply need to connect several laptops and smartphones for file sharing, a classic infrastructure network will suffice. If you don't have a router, you can create a computer-to-computer connection, known as Ad-Hoc, although this method is considered less reliable and safe.
For a home infrastructure, you'll need to ensure all devices are on the same broadcast domain. This means they should be connected to the same SSID (network name) and use the same encryption type. Modern routers typically use the protocol WPA3 or WPA2-Personal, which provides a sufficient level of traffic protection from outsiders.
⚠️ Please note: When using Ad-Hoc (point-to-point) mode without a router, the connection speed is often limited to 54 Mbps, and the range does not exceed 10 meters in direct line of sight.
Check the network adapters on all connected devices. Outdated 802.11g cards can become a bottleneck, slowing down the entire network. Also, make sure your network adapter drivers are updated to the latest version available on the manufacturer's website.
Setting up a router for local sharing
The router configuration is the foundation upon which all subsequent network operation is built. You need to log into the device's web interface by entering the gateway IP address in your browser. This is usually the address 192.168.0.1 or 192.168.1.1, but it may differ depending on the equipment model.
In the LAN settings section, it's important to check the DHCP server. This service automatically assigns IP addresses to connected devices, eliminating the need to manually assign them. Make sure the address pool is large enough to cover all your devices, including smartphones, TVs, and smart speakers.
To ensure stable operation of local resources, it is recommended to reserve static IP addresses for your primary computers. This can be done by binding the MAC address to a specific IP address in your router settings. This ensures your computer will always be accessible at the same address, which is critical for setting up folder sharing.
Special attention should be paid to setting up client isolation. This feature is often enabled by default on guest networks and prevents devices from seeing each other. To create a LAN network, this option must be enabled. turn off, otherwise computers will not be able to exchange data if they only have access to the Internet.
Configuring network settings in Windows
After setting up the router, we move on to the operating system. In Windows, network connections are managed through the Control Panel or system settings. It's important that the network profile is set to "Private," as the system blocks detection of other devices when set to "Public."
To edit your profile, go to Settings → Network & Internet → StatusClick on your WiFi connection properties and select the "Private" network type. This will make your computer visible to other devices and open the necessary ports for local data transfer.
Next, you need to check the TCP/IP protocol settings. Open the adapter properties and make sure the box next to it is checked. Internet Protocol version 4 (TCP/IPv4)In the protocol properties, you must select Automatic IP address and DNS unless you are using a manual addressing scheme.
☑️ Check Windows settings
If automatic configuration doesn't work, you can manually enter a static address. This is done in the same IPv4 protocol properties. Enter an IP address within the router's subnet (e.g., 192.168.1.50), subnet mask 255.255.255.0 and the gateway by the router address.
Organizing file and printer sharing
Once the network settings are configured, it's time to share resources. In Windows 10 and 11, this process is controlled through the Network and Sharing Center. Go to the "Change advanced sharing settings" section to enable the desired features.
Enable network discovery and file and printer sharing. These two options are key to making your computer visible to others. You can also enable HomeGroup management if you're using older versions of Windows, although this feature has been deprecated in newer builds in favor of standard sharing.
To grant access to a specific folder, right-click it, select "Properties," and go to the "Sharing" tab. Click "Advanced Settings" and check the "Share" box. You can also configure permission levels for different users here.
| Access type | Description | Recommended use |
|---|---|---|
| Reading | The user can only open files | Public documents, media |
| Change | Reading, writing and deleting are allowed. | Working projects, shared folders |
| Full access | Full control over the folder and rights | For administrator only |
| Disabled | Access denied | System folders |
⚠️ Warning: Granting "Full Control" or "Change" rights to the "Everyone" group creates a risk of data loss if one of the computers is infected with ransomware.
To connect a network printer, go to "Devices and Printers" and select "Add a printer." The system should automatically find the device on the network. If the printer is connected to one of the computers, make sure the appropriate box is checked in the printer properties on the "Sharing" tab.
Security issues and data protection
An open local network is potentially vulnerable if hackers gain access. Even within the WiFi perimeter, it's important to follow basic security practices. Using strong passwords on Windows user accounts is the first line of defense.
When connecting to shared folders, the system may prompt for a username and password. This is normal and ensures authorization. It is recommended to create identical accounts (with username and password) on all computers on the network so that login occurs automatically without repeated prompts.
How to create the same user on all PCs?
Open "Computer Management" (you can search for it in the Start menu) and go to "Local Users and Groups" -> "Users." Create a new user with a name like "homeuser" and the same password on all computers. Then use these credentials when accessing resources.
The Windows firewall also plays an important role. Make sure your firewall rules allow incoming connections for File and Printer Sharing. If you use a third-party antivirus, its built-in firewall may block local traffic, considering it suspicious.
Update your router firmware regularly. Manufacturers frequently release patches to address vulnerabilities in wireless protocols. An outdated router firmware version can open the door to traffic interception within your LAN.
Diagnosing and troubleshooting
Even with proper configuration, problems may still occur. If the computers can't see each other, first try using the built-in diagnostics. In the command prompt (run as administrator), enter the command ping [IP address of another PC]No response (Request timed out) indicates a connection problem or ICMP requests are blocked.
A common problem is the "Browser Computer" or "Discovery" service. In modern versions of Windows, the service responsible for discovery is Function Discovery Resource PublicationMake sure it is running and in automatic mode.
Antivirus software is often the main culprit behind LAN issues. Try temporarily disabling your antivirus's firewall. If the network is working again, add your home network to the trusted list in your security software settings.
It's also worth checking the DNS service. Sometimes computer names don't resolve to IP addresses. In this case, use IP addresses to access resources. To improve the situation, you can add static entries to a file. hosts, located along the way C:\Windows\System32\drivers\etc\hosts.
⚠️ Note: Windows and router settings interfaces may differ depending on software versions. Always consult your equipment manufacturer's documentation if the default menu paths differ.
Optimizing Wireless LAN Speed
Data transfer speeds on WiFi networks are always lower than on wired networks due to protocol overhead and interference. To maximize performance, use the 5 GHz band, which is less congested with neighboring networks and provides a wider channel.
Place the router centrally relative to workstations. Walls, especially load-bearing ones with reinforcement, and household appliances (microwaves, baby monitors) create interference. Ideally, there should be a direct line of sight between the client and the router.
You can select the least congested channel in your router settings. Use WiFi analyzer apps on your smartphone to find a free frequency. Switching to a static channel often provides increased stability compared to "Auto" mode.
Make sure all devices are using the same encryption standard. Mixed modes (such as WPA/WPA2) can reduce performance. Also, disable older standards (802.11b/g) if all your equipment supports modern versions (n/ac/ax).
FAQ: Frequently Asked Questions
Why can't my computer see other devices on the network?
Most likely, your network profile is set to "Public." Switch it to "Private" in the network settings. Also, check that the detection service is enabled and that your antivirus isn't blocking the connection.
Is it possible to create a LAN network without a router?
Yes, this is possible by creating a computer-to-computer (Ad-Hoc) connection or using the Mobile Hotspot feature in Windows 10/11, where one PC distributes the WiFi and others connect to it. However, the speed and stability will be lower than using a router.
Is it safe to share folders?
This is safe within a trusted home network, provided you use strong passwords on user accounts. It is not recommended to grant full access to the "Everyone" group without a password.
How to speed up large file transfers over WiFi?
Use the 5 GHz band and ensure your devices support the 802.11ac or ax standard. For speed-critical tasks, a wired Ethernet connection is recommended.
Do you need a static IP for LAN to work?
This isn't required, but it's highly recommended for computers providing resources (printers, file storage). A dynamic IP address may change after a router reboot, causing links to resources to stop working.