Local Area Network via Wi-Fi: How to Set Up and Use

Creating a local network over a wireless connection is a basic skill that transforms disparate devices into a unified ecosystem. Instead of transferring files via USB drives or cloud storage, you gain direct access to your computer's resources from your phone or TV. Modern routers and operating systems have significantly simplified this process, but the basic principles remain the same.

You don't need special cables or complex equipment. All you need is for all devices to be within the coverage area of ​​a single access point. Local area network In this context, a LAN (LAN) will operate over a wireless protocol, providing data transfer speeds sufficient for streaming 4K video or backing up documents. The key is to set up security settings and shared folders correctly.

Before proceeding with settings, make sure your router is working properly and is providing internet access. If devices can see the global network but not each other, the problem lies in the discovery settings. We'll cover a step-by-step procedure that applies to most home use cases.

Preparing equipment and checking connections

The first step is a physical connection test. All devices that need to connect to the network must be connected to the same router. It doesn't matter whether you're using 2.4 GHz or 5 GHz, as long as they're on the same subnet. Check that the Wi-Fi icon is lit on all devices and that the full name of your network is displayed.

Please note IP addressingIn a typical home environment, the router automatically assigns addresses via a DHCP server. This means each device is assigned a unique number, such as 192.168.1.5 or 192.168.0.15. If the addresses begin with 169.254, the device hasn't received the settings from the router, and the network won't work.

• 📡 Make sure that Wi-Fi is enabled on all devices.
• 🔌 Check that all gadgets are connected to the same access point (SSID).
• 🌐 Make sure the network type in Windows is set to "Private" and not "Public".

⚠️ Note: If you have a dual-band router with identical network names for 2.4 and 5 GHz, modern devices will automatically select the best channel. However, if the names are separate (for example, Home_2G and Home_5G), all devices must be connected to one of them for local sharing to work correctly.

You can use the command line for diagnostics. On your computer, press Win + R, enter cmd and press Enter. In the black window, enter the command ipconfigFind the "Default Gateway" line—this is your router's address. This is what you should use for configuration.

Setting up sharing in Windows

The Windows operating system blocks incoming connections by default for security reasons. To turn your PC into a local network node, you need to enable discovery features. Open Control Panel, go to Network and Sharing Center, and select Change advanced sharing settings.

In the "Private" (current) profile, you need to enable network discovery and file and printer sharing. This will allow other devices to see your computer in the list of available resources. It's also recommended to enable automatic configuration of connected network devices so that the system manages access rights automatically.

Next, let's move on to folders. Select the directory you want to share, right-click it, and select "Properties." Go to the "Sharing" tab and click "Advanced." Check the "Share" box and set the permissions. For a home network, you can grant read and write permissions to all users, but for an office, it's better to restrict access to specific accounts.

• 💻 Enable "Network discovery" in your private network profile.
• 📂 Open "Advanced Sharing" for the target folder.
• 🔑 Add the "Everyone" user with read/write permissions for easier access.

It's important to disable password protection if you want to simplify logins from TVs and set-top boxes that don't require a Windows login and password. Under "All Networks," find "Password-protected Sharing" and select "Disable." This will reduce security, but will make connecting media players painless.

Networking on macOS and mobile devices

Apple's ecosystem works differently, using a protocol SMB and native Bonjour for discovery. For a Mac to see a Windows computer, or vice versa, you need to ensure the SMB v2/v3 protocol is enabled. On macOS, go to System Preferences → Sharing and enable File Sharing.

Click the information button next to the switch and add the folder you want to share. Under permissions, specify who can read and write files. To connect from Windows to a Mac, use the address smb://IP-address-Mac In File Explorer. On iPhone or iPad, it's convenient to access files using the Files app and select the Network section.

Android devices also support the SMB protocol. File managers (such as Solid Explorer or CX File Explorer) have a feature for adding a network location. You'll need to enter the computer's IP address and, if security is enabled, the Windows account login and password.

⚠️ Warning: SMB version 1.0 is considered obsolete and insecure. Modern versions of Windows 10 and 11 block it by default. If you have an older NAS or TV that only sees the network via SMBv1, you should enable it separately in Windows Features, understanding the risks.

Setting up a Wi-Fi router for a local network

Most routers are configured correctly out of the box, but there are exceptions. Log into your router's web interface (usually 192.168.0.1 or 192.168.1.1). Find the section related to wireless networking. Make sure "AP Isolation" is disabled.

AP Isolation — This is a feature that prevents devices connected via Wi-Fi from seeing each other. It's often enabled on guest networks at hotels or cafes. If it's enabled on your home network, computers won't be able to exchange data, even if they're on the same subnet.

Also, check your DHCP settings. The address pool should be large enough to accommodate all devices. If you have many devices, increase the range of allocated addresses. It's best to reserve a static IP address for the server (the computer with the files) so that the address doesn't change after a router reboot.

• 🚫 Find and disable "AP Isolation" or "Client Isolation".
• 📡 Make sure WMM (Wi-Fi Multimedia) is enabled for traffic priority.
• 🔒 Use WPA2/WPA3 encryption, but not WEP, as it may block some features.

What is a static IP and why is it needed?

A static IP address doesn't change when you reboot your router. This is critical for setting up port forwarding, connecting IP cameras, or creating a media server. If your computer's address changes, the TV will no longer see folders at the old path.

Port forwarding and remote access

If you need to access your local network from the outside (via the internet), simply setting up Wi-Fi isn't enough. You'll need technology Port Forwarding (port forwarding). This is a mechanism that redirects an incoming request from an external network to a specific device within your LAN.

In your router settings, find the "Virtual Server," "Port Forwarding," or "NAT" section. You'll need to specify the external port (e.g., 8080) and your computer's internal IP address with the service port (e.g., 80 for a web server or 21 for FTP). Without this setting, the router will simply drop incoming data packets.

Example of forwarding setup:
External port: 3389
Internal IP: 192.168.1.50
Inland port: 3389
Protocol: TCP/UDP
Status: Enabled

However, opening ports is not safe. Attackers constantly scan the network for open ports. A more secure alternative for remote access is to create a VPN server on your router or use programs like Tailscale/ZeroTier, which create a secure tunnel without the need to manually forward ports.

⚠️ Note: Router interfaces are constantly updated by manufacturers. The location of the "Port Forwarding" or "Virtual Server" menu may vary. If you don't find an exact match, look for the WAN, NAT, or Security sections in your model's manual.

Typical errors and methods for eliminating them

Even with proper configuration, conflicts can still occur. The most common issue is devices not seeing each other. Check your antivirus and Windows Firewall. They may be blocking incoming connections, considering them suspicious. Try temporarily disabling the firewall for diagnostic purposes.

Another common error is a workgroup mismatch. In Windows, the default name is WORKGROUPIf it's renamed on one computer, it may not appear in the network neighborhood of other computers, although access via direct IP address will still work. Check this in System Properties.

If your Wi-Fi file transfer speed is very slow (less than 1 MB/s), you may be located far from your router or the channel is congested. Use Wi-Fi analyzers to find free channels. Also, make sure you're not using power-saving mode on your network card, which can reduce signal strength.

• 🛡️ Check if your antivirus is blocking the SMB network protocol.
• 🔄 Make sure the workgroup name is the same on all PCs.
• ⚡ Disable power saving for the Wi-Fi adapter in Device Manager.

Why is my computer visible on the network, but folders won't open?

The issue is most likely related to NTFS permissions or password protection. Even if network discovery is enabled, the folder itself may have restrictions. Check the "Security" tab in the folder's properties and add the "Everyone" user with read access. Also, try disabling password protection in the Network and Sharing Center.

Is it possible to create a local network without a router?

Yes, it's called an ad-hoc network. One computer can create a direct wireless connection to another. However, in Windows 10/11, this feature is hidden and requires creation via the command line or third-party software. It's easier and more stable to use even the cheapest router or the "Hotspot" mode on your smartphone, although the latter may have traffic limitations.

How to increase file transfer speed over Wi-Fi?

Use the 5 GHz band, which is less noisy and supports wider channels. Make sure the channel width in your router settings is set to 40 or 80 MHz. Speed ​​also depends on the Wi-Fi standard: if your router supports Wi-Fi 6 (802.11ax) and your adapter is older (802.11n), the speed will be limited by the older standard.