How to create a local network via a Wi-Fi router: a step-by-step guide

Creating a local area network (LAN) is a fundamental solution for exchanging data between devices in an apartment or office without using cloud storage. Local area network It allows you to instantly transfer files weighing tens of gigabytes, display images on a TV, or connect a network printer without loading your ISP's external bandwidth. Unlike internet transfers, the speed here is limited only by the capabilities of your equipment and router.

Modern Wi-Fi routers While these devices automatically create a basic communication environment, manual configuration of security and sharing settings is often required for full functionality. Many users mistakenly believe that simply connecting to a single access point is sufficient, but without proper Windows or macOS configuration, computers may simply not be able to "see" each other. In this article, we'll walk you through the process, from physical connection to setting up complex access profiles.

Before you begin the software, you need to make sure that all devices you plan to connect are connected to the same router. This can be either a wireless connection using a standard 802.11ac or 802.11ax, as well as a wired connection via Ethernet cable. The stability of the entire system directly depends on the signal quality and the absence of IP address conflicts within the network segment.

Preparing equipment and checking connections

The first step in building the infrastructure is physically connecting the nodes. If you are using a desktop computer, the best solution Connecting it to the router via twisted-pair cable will ensure maximum speed and minimal latency. Laptops and mobile devices can remain on Wi-Fi, creating a hybrid network where wired and wireless clients are treated equally.

Make sure the lights on the front of the router are lit or flashing as expected. Typically, the light will LAN or WLAN indicates a successful link. If the indicators don't respond, check the cable's integrity or try reconnecting to a different Wi-Fi access point, ruling out temporary adapter issues.

• 🔌 Check that the Ethernet cable is firmly inserted into the connectors until you hear a distinctive click.
• 📡 Make sure that the devices are connected to the same SSID (network name) of the router.
• 💡 The activity indicators on the network card should blink when data is being transferred.

⚠️ Attention: If you're using a guest Wi-Fi network on your router, devices on it may be isolated from the main network. To create a local network, disable the "AP Isolation" feature or connect all devices to the main profile.

It's also important to consider that some providers provide their own terminals that operate in modem mode, with the user's router connected over them. This double NAT setup can cause difficulties with device visibility, so it's recommended to set the provider's equipment to bridge mode or use only one active router.

Setting up IP addressing and a DHCP server

To interact correctly, each device on the network requires a unique IP addressIn most home scenarios, the router's built-in DHCP server handles this task, automatically assigning addresses from a pool. However, setting up a file server or connecting network printers often requires static addressing to ensure resource paths remain consistent after a reboot.

You can access the router settings through the web interface by entering the gateway address in the browser address bar, usually this is 192.168.0.1 or 192.168.1.1. In the menu LAN Settings or Network Map You can see a list of connected clients and reserve a permanent address for the desired device based on its MAC address.

If automatic address assignment doesn't work or you're building a network without a router (computer-to-computer), you'll have to manually enter the parameters in the network adapter properties. The subnet mask must be the same for all participants; 255.255.255.0, which allows you to have up to 254 devices in one segment.

When setting up manually, it is important to avoid address conflicts: two devices with the same IP address will not work on the same network. It is better to select a range of addresses for manual distribution outside the router's DHCP pool.For example, if the router distributes from 100 to 200, assign static in the range 2-99.

Sharing Configuration in Windows

After a successful connection at the protocol level, you need to configure the operating system to allow file sharing. In Windows, this feature is called "Sharing" and is located in the Network and Sharing Center. By default, the system blocks detection of other computers on public networks for security reasons.

Open the Control Panel and go to the section Network and Internet, then select Network and Sharing CenterIn the left menu, click "Change advanced sharing settings." Here you'll need to enable network discovery and file and printer sharing for the current network profile (Private or Guest).

• 💻 Enable the "Turn on network discovery" option to make your computer visible.
• 📂 Enable "Turn on file and printer sharing."
• 🔐 Turn off "Password-protected sharing" if you want to make it easier to sign in (only on trusted networks).

It's worth noting that disabling password protection reduces security, allowing anyone connected to your Wi-Fi to access shared folders. In an apartment building with password protection, it's best to create a separate user with access rights only to shared folders.

⚠️ Attention: The SSDP Discovery and Function Discovery Resource Publishing services must be running in Windows. If the computers cannot see each other, check their status in services.msc.

Also, make sure your antivirus or built-in firewall isn't blocking incoming connections. Often, when installing new antivirus software, the network profile can automatically change to "Public," severely limiting the device's visibility to others.

Creating shared folders and accessing resources

Once the network settings are complete, you can select the data you want to share. The process is simple: you select a folder on your drive, instruct the system to share it over the network, and it will appear in the "Network Neighborhood" on other computers.

To do this, right-click the desired folder, select "Properties," and go to the "Access" tab. Click the "Advanced" button and check the "Share this folder" box. In the "Permissions" section, you can fine-tune who can only read files and who has write and modify permissions.

To access another computer's resources, open File Explorer and enter the IP address of the target device in the address bar, for example \\192.168.1.15If everything is configured correctly, a window will open with a list of available folders. For convenience, you can right-click the folder and select "Mount as network drive" to display it as a separate drive (e.g., Z:) in "My Computer."

In modern versions of Windows 10 and 11, there's a common issue with the SMBv1 protocol, which is disabled by default due to vulnerabilities. If you're trying to connect to an older NAS device or printer, you may need to enable support for older protocols using "Turn Windows features on or off," but this should only be done if absolutely necessary.

Setting up a Wi-Fi router for stable operation

The quality of your wireless local network directly depends on the router's settings. Access the device's web interface (usually via 192.168.0.1) and check the wireless network section (Wireless). Make sure that the operating mode does not limit the speed, for example, do not set the mode to "802.11b only" if your devices support faster standards.

An important parameter is the channel width. For the 2.4 GHz band, it is better to set the value 20 MHz, if there are a lot of neighboring networks in the room, as this will reduce interference. For the 5 GHz band, you can safely set 40 MHz or 80 MHz for maximum speed of transferring large files within the network.

Encryption is also worth paying attention to. Use a standard WPA2-PSK (AES) or WPA3. Outdated encryption methods like TKIP or WEP can limit connection speeds to 54 Mbps, which can become a bottleneck for your entire local network.

What is AP Isolation?

This feature is designed for hotels and cafes. It prevents devices connected to Wi-Fi from seeing each other. For a home network, this feature must be disabled; otherwise, computers won't detect each other, even if they're on the same subnet.

Don't forget about your router's firmware. Manufacturers frequently release updates that fix issues with the DHCP server or wireless module drivers. Updating the firmware can resolve connection interruptions when copying large amounts of data.

Diagnosing problems and troubleshooting errors

Even with proper configuration, situations may arise where the network is unstable or devices disappear from the list. The first diagnostic tool is the utility pingOpen the command prompt (cmd) and type ping 192.168.1.X (target device address). If there are responses, the physical connection and IP addressing are fine, and the problem should be looked for in Windows settings or the firewall.

If ping fails (the timeout period has been exceeded), check whether your antivirus software is blocking ICMP requests. Another common cause is different network types: if one computer considers the network "Private" and the other "Public," Windows may block data exchange between profiles with different trust levels.

• 🛑 Check if the status is "No Internet Access" (although the internet is not required for a local network, Windows may block the exchange).
• 🔄 Reboot your router and all client devices to clear the ARP cache.
• 🔌 Make sure the Computer Browser service is enabled on all computers.

In complex cases, when standard diagnostic tools do not help, you can use third-party software to create virtual LANs, for example, Hamachi or Radmin VPNThese programs create a secure tunnel over an existing connection, emulating a local network even over the internet, which is useful if direct IP access is impossible due to provider restrictions.

⚠️ Attention: Router interfaces from different manufacturers (Asus, TP-Link, Keenetic, Mikrotik) may differ. Menu item names may vary, but the setup logic (IP, DHCP, Wireless Security) remains the same for all devices.

Questions and Answers (FAQ)

Is it possible to create a local network if there is no internet?

Yes, a local area network (LAN) doesn't require internet access. All you need is a router plugged in and assigning IP addresses, or computers connected directly by cable. All files will be transferred within your network.

Why can't computers see each other on the network?

Most often, the problem is the "Public" network profile in Windows, which is blocking detection. Also, check if the Network Discovery service is enabled and that your antivirus isn't blocking the connection.

What is the maximum speed on a local Wi-Fi network?

Speed ​​depends on the Wi-Fi standard. For 802.11n (2.4 GHz), actual speeds are around 20-40 Mbps. For 802.11ac (5 GHz), you can achieve 100-400 Mbps and higher, which is comparable to a fast wired connection.

Is it safe to share folders?

It's only safe if you trust everyone connected to your Wi-Fi. Be sure to use strong Wi-Fi passwords and, ideally, enable password protection for sharing in Windows settings.

Do you need a router to connect two computers?

No, two computers can be connected directly with a twisted pair cable (modern network cards will automatically detect the cable type). In this case, both computers must be manually assigned IP addresses from the same subnet, for example, 192.168.1.1 and 192.168.1.2.