Organization local area network LAN (LAN) within an apartment or small office is no longer the exclusive domain of system administrators. Today, when every user has a laptop, smart TV, game console, and network storage, the need to quickly share files without external drives is becoming critical. Wireless technology allows all these devices to be integrated into a single ecosystem, providing access to a media library and documents from any device within range.
Modern wireless communication standards such as Wi-Fi 5 And Wi-Fi 6, provide sufficient bandwidth for comfortable transfer of large amounts of data, viewing high-definition video, and even working with network databases. However, despite the advancement of technology, the setup process often presents difficulties for users due to the specific operating systems and security settings of routers. Proper hardware and software configuration is essential for the stable operation of the entire home infrastructure.
In this article, we'll cover the entire process of creating a local network segment in detail, from basic router settings to fine-tuning access rights in the operating system. You'll learn how to avoid common mistakes, which security settings are truly necessary, and how to ensure your devices "see" each other immediately after powering on.
Preparing the equipment and checking the basic router settings
The first step to creating a stable local environment is to properly configure the central hub—the wireless router. It distributes IP addresses and manages traffic between connected clients. Ensure that all devices you plan to connect are connected to the same wireless network (SSID). If your router supports a guest network, remember that devices in the guest segment are isolated from the main network by default and will not be able to communicate with each other.
The key parameter here is work DHCP serversThis service automatically assigns unique addresses to each connected device, eliminating the need to manually enter them. In most cases, the router's factory settings are already optimal, but it's worth going to the administrator's web interface and checking whether this feature is enabled. The path to the settings usually looks like this: LAN → DHCP Server or Network → Local Area Network.
⚠️ Note: Some providers offer routers with limited functionality, preventing access to advanced local network settings. In this case, it makes sense to set the device to bridge mode and use your own router for full network control.
It's also important to pay attention to the frequency range. For local file sharing, it's preferable to use the frequency range 5 GHz, as it offers higher data transfer rates and lower interference compared to the crowded 2.4 GHz band. However, it should be noted that the signal range at this frequency is shorter, and walls can significantly weaken the signal.
Setting up a network profile and discovery in Windows
By default, the Windows operating system seeks to protect the user's privacy by hiding the computer from prying eyes in public places. To enable devices to "see" each other, you need to change the network profile from "Public" to "Private." This action informs the system that you are in a trusted environment and allows discovery of other nodes.
To perform this procedure, open Network & Internet settings, select your active connection, and change its properties. After that, you'll need to enable network discovery. This can be done through the Control Panel by going to the "Network Discovery" section. Network and Sharing Center → Change advanced sharing settingsHere you should enable network discovery and file and printer sharing.
- 🔹 Open "Settings" and go to "Network & Internet".
- 🔹 Select the "Private" network type for your active connection.
- 🔹 Turn on Network Discovery in Advanced Settings.
- 🔹 Enable file and printer sharing.
It's important to note that changes take effect only after applying the settings. Some operating system versions may require restarting the network adapter or even a complete system restart for all firewall rules to apply correctly. If, after enabling these features, the computers still can't see each other, the problem may be with a third-party antivirus program blocking local connections.
Organizing shared access to folders and files
Once the network infrastructure is configured, it's time to organize access to resources. You can share any folder on the drive, making it readable or writable by other computers. To do this, right-click the folder, select "Properties," and go to the "Sharing" tab. Click "Advanced" and check "Share this folder."
Particular attention should be paid to access rights. By clicking the "Permissions" button, you can fine-tune who can do what with files. For a home network, the "Everyone" group is often sufficient, but for an office, it's better to create specific users. This will allow for auditing and prevent unauthorized users from accidentally deleting important documents.
There's also the concept of a "Public folder," which is accessible by default to all users of the computer. It can also be made accessible over the network, but this method is less flexible than sharing custom directories. Using custom folders allows you to logically structure your data, separating media content, work documents, and system files.
| Access type | Description | Recommended use |
|---|---|---|
| Reading | The user can only open and copy files. | Media libraries, document archives, reference books |
| Change | The user can edit and delete files | Working projects, general tasks |
| Full access | Full control, including changing access rights | For network administrator only |
| Special rights | Flexible customization of individual operations | High-demand corporate environments |
⚠️ Warning: Granting "Full Control" permissions to the "Everyone" group creates a serious vulnerability. Any device connected to your Wi-Fi (including guest devices) can delete or encrypt your data with ransomware.
Setting up a connection via IP address and network name
Sometimes automatic discovery doesn't work correctly, and computers don't show up in the network neighborhood. In such cases, the most reliable method is a direct connection via IP address. Each device on the local network has a unique address, for example, 192.168.1.10Knowing this address, you can access resources directly, bypassing detection services.
To connect, open File Explorer and enter two backslashes followed by the IP address of the target computer in the address bar. For example: \\192.168.1.55If the access rights are configured correctly, the system will prompt you for the username and password of the user account on the remote computer. After successful authorization, you will see a list of available shared folders.
☑️ Checking IP connection
To avoid having to enter the address each time, you can map the network folder as a separate drive. In File Explorer, select "This PC," click "Map Network Drive," select the drive letter, and enter the path to the resource. This will allow you to work with remote files as if they were located on your hard drive. For stability, we recommend setting a static IP address for the file server in your router settings so that it doesn't change after a reboot.
An alternative to an IP address is a computer's network name, but this relies on DNS and NetBIOS, which can be disabled or unstable in modern versions of Windows. Using a numeric IP address is a more reliable and faster way to establish a connection on a local network.
Solving common visibility and access issues
One of the most common issues is the error "Windows cannot access...." This is often due to a disabled SMB 1.0 file sharing support service, which is required for communication with older devices, such as network printers or older NAS devices. However, enabling it should be done with caution, as the SMBv1 protocol is considered obsolete and insecure.
Another common cause is time desynchronization. If the system time on the computers differs significantly, the Kerberos security protocol may block the connection. Ensure that all devices are set to automatically update their time via the internet. Issues can also arise due to different versions of the SMB protocol, especially when trying to connect Windows 10/11 to Windows XP or older versions of macOS.
How to enable SMB 1.0 safely?
Enable SMB 1.0 only if absolutely necessary for older hardware. Go to Control Panel → Programs and Features → Turn Windows features on or off. Find "SMB 1.0/CIFS file sharing support" and select only "Client." Do not enable the server portion unless absolutely necessary.
Windows Firewall may also be blocking incoming connections. Check your incoming connection rules and ensure that the "File and Printer Sharing" rules are enabled for "Private" profiles. Sometimes, simply resetting your network settings via the Command Prompt with administrator privileges can help.
For diagnostics, you can use the command pingOpen the command prompt and type ping 192.168.1.XX (where XX is the target device's address). If packets are lost, the problem lies with the physical connection or Wi-Fi drivers. If ping works but access is denied, the issue lies with software settings or access rights.
Local network security and data protection
A local network that's open to the public is potentially vulnerable, especially if your Wi-Fi is accessible to outsiders. The primary line of defense is a strong wireless network password and encryption. WPA2/WPA3Never use outdated WEP encryption, which can be cracked in minutes.
Additionally, always use password protection to access shared folders. Disabling password protection in Windows is only permissible in completely isolated home networks where the risk of outside intrusion is reduced to zero. In other cases, requiring authorization is mandatory.
- 🔹 Use complex passwords for Windows user accounts.
- 🔹 Update your router firmware regularly to patch vulnerabilities.
- 🔹 Turn off folder sharing when you don't need it.
- 🔹 Use a guest Wi-Fi network for visitors' devices.
It's also important to keep your operating system up-to-date. Microsoft regularly releases patches to close vulnerabilities in network protocols. Ignoring security updates can result in your computer becoming part of a botnet or becoming the victim of a local network attack.
Why can't computers see each other on the network?
Most often, the problem lies with the network profile. If the network is marked as "Public," Windows blocks discovery. Also, check the "Function Discovery Host" service and make sure it's running. In rare cases, resetting the TCP/IP stack with the command netsh int ip reset helps.
Is it possible to set up a local network between Windows and macOS?
Yes, this is possible via the SMB protocol. On a Mac, you need to enable file sharing in System Preferences. When connecting from Windows, use the Mac's IP address. Please note that filenames with restricted characters in Windows may not display correctly on a Mac, and vice versa.
Does Wi-Fi speed affect file copy speed?
Yes, directly. Actual transfer speeds over Wi-Fi are typically 50-60% of the router's theoretical speed due to protocol overhead and interference. For larger files (over 10 GB), a wired Gigabit Ethernet connection is preferable.
Do you need a static IP to set up a local area network?
For general network operation, no, DHCP will do the trick. However, for convenient access to a file server or printer, a static IP (address reservation in the router) is highly recommended so that the resource path doesn't change after a reboot.