Connecting Wi-Fi to a Computer via a Router Cable: 3 Working Methods

Are you faced with a paradoxical situation: Wi-Fi works perfectly on your smartphone or laptop, but your desktop PC or computer without an adapter stubbornly refuses to connect to the wireless network? And yet, you have a free internet connection at hand. Ethernet cable, connected to a router. This article will help you turn this problem into an advantage: we'll look at how Share Wi-Fi from your computer, using a wired connection, and set up a stable Internet connection on all devices.

Spoiler alert: the solution is obvious. Your router is already distributing Wi-Fi, but your computer can't connect to it due to a lack of Wi-Fi adapter or drivers. But he has one. LAN port, through which you can not only get the Internet, but also Turn your PC into a Wi-Fi hotspot for other devicesThis is relevant for offices where coverage needs to be expanded, or for home networks with "dead" zones.

This guide includes three proven methods with step-by-step screenshots, a hardware compatibility chart, and answers to frequently asked questions. No "magic": just technical nuances that work. Windows 10/11, macOS and even Linux (with caveats). Let's start with the simplest thing—checking your current connection.

1. Checking the current connection: why Wi-Fi doesn't work, but the cable does

Before setting up Wi-Fi distribution from your computer, make sure that wired connection works correctly. Open Control Panel → Network and Internet → Network and Sharing Center (or use a combination Win + R and enter ncpa.cpl). Here you will see all network adapters:

• 🔌 Ethernet (or "Local Area Connection") - should be marked as "Network: Internet" with an active status.
• 📶 Wi-Fi If the adapter is present but disabled, its icon will be grayed out. If there's no adapter at all, this option won't appear.
• 🌐 High-speed connection (PPPoE) - relevant for some providers (for example, Rostelecom or Beeline).

If next to Ethernet If the yellow exclamation mark is on, the problem is with the router or provider. Reboot your router (pull the plug for 30 seconds) and check the cable - it should be tightly inserted into the port LAN (not to be confused with WAN!). If the port indicator on the router is not lit, try a different cable or port.

⚠️ Attention: If your computer is connected to the router via a port WAN (usually highlighted in color), the internet will not work. WAN It's designed for the ISP cable, not the local network. Connect only to the ports. LAN (numbered 1–4).

If your wired connection works but your PC doesn't have Wi-Fi, you have two options:

1. Buy USB/Wi-Fi adapter (from 500 ₽) and connect the computer to the router directly.
2. Tune distributing Wi-Fi from a computer via cable - more on that later.

2. Method 1: Sharing Wi-Fi from a computer via Mobile Hotspot (Windows 10/11)

The easiest way to turn your PC into a hotspot is to use the built-in feature Mobile HotspotIt is available in Windows 10 (version 1607 and later) and Windows 11There is only one condition: your computer must have Wi-Fi adapter (even if it is not currently connected to the network).

How to check if the adapter is available? Open device Manager (Win + X → Device Manager) and find the section Network AdaptersLook for lines with words Wireless, Wi-Fi, 802.11 or names of manufacturers (Intel, Qualcomm Atheros, Broadcom). If there is no such thing, the method will not work.

Check for the presence of a Wi-Fi adapter in Device Manager

Update your adapter driver (via the manufacturer's official website)

Connect the cable from the router to the LAN port on the PC

Make sure your PC has internet access (open your browser)-->

Now let's move on to the setup:

1. Open Settings → Network & Internet → Mobile Hotspot.
2. In the field "Sharing" select Ethernet (or "Local Area Connection").
3. Click "Change" next to "Network data" and set:
   • 🔑 Network name (SSID) - any, for example MyPC_Hotspot.
   • 🔒 Password — minimum 8 characters (use letters and numbers).
   • 📡 Network range - if the adapter supports 5 GHz, select it for less interference.

Done! Now other devices (smartphones, tablets, laptops) can connect to the created network. Limitations of the method:

• ⚠️ Maximum number of connected devices — 8 (depending on the adapter).
• ⚠️ The speed will be lower than with a direct connection to the router (due to double routing).
• ⚠️ On some laptops, the hotspot turns off when you close the lid.

⚠️ Attention: If your PC's internet connection disappears after enabling the hotspot, check your firewall settings. Sometimes Windows Defender blocks sharing. Add an exception for svchost.exe in the firewall rules.

3. Method 2: Configuration via command line (for advanced users)

If Mobile Hotspot doesn't work (for example, due to an outdated version of Windows or driver issues), you can set up Wi-Fi sharing manually via command lineThis method is universal and works even on Windows 7, but requires accuracy.

First, check if your Wi-Fi adapter supports the mode «Hosted Network»To do this:

1. Open command prompt as administrator (Win + X → Command Prompt (Administrator)).
2. Enter the command:

   netsh wlan show drivers

3. Find the line Hosted Network SupportIf it says there Yes, we can continue.

If there's no support, update the adapter driver or use another method (see Section 4). If everything is OK, run the commands one by one:

1. Create a new network:

   netsh wlan set hostednetwork mode=allow ssid=MyWiFi key=12345678 keyUsage=persistent

   Replace MyWiFi to the desired network name, and 12345678 — password (minimum 8 characters).

2. Start the distribution:

   netsh wlan start hostednetwork

3. Open Network and Sharing Center → Change adapter settings.
4. Find a new connection Wireless Network (or "Local Area Connection* X"), right-click → "Properties" → tab "Access".
5. Check the box Allow other network users to connect through your Internet connection and select Ethernet in the drop-down list.

Your computer is now distributing Wi-Fi. To stop distributing, use the following command:

netsh wlan stop hostednetwork

⚠️ Attention: After rebooting your PC, Wi-Fi sharing via the command line is disabled. To enable it automatically, create .bat-file with command netsh wlan start hostednetwork and add it to startup.

4. Method 3: Using third-party programs (for all versions of Windows)

If the previous methods did not work or you need advanced settings (for example, Speed ​​Limit for connected devices or MAC address blacklist), use specialized programs. We tested three reliable solutions:

Let's look at the setup using an example MyPublicWiFi (the lightest and free program):

1. Download the program from official website (avoid third party sources!).
2. Install and run as administrator.
3. In the field «Network Name (SSID)» Enter the network name.
4. In the field «Network Key»** — password (minimum 8 characters).
5. In the section «Internet Sharing»** select Ethernet (or your current connection).
6. Click «Set Up and Start Hotspot»**.

The program will automatically configure the virtual router. Tab «Clients»** will show all connected devices with their MAC addresses and IP. You can also block unwanted users here.

5. macOS Setup: How to Share Wi-Fi from a Mac via Cable

If you have MacBook or iMac with port Ethernet (or adapter USB-Ethernet), you can share Wi-Fi in a similar way. In macOS, this is called Common Internet.

Instructions:

1. Connect the cable from the router to the port Ethernet (or adapter).
2. Open System Preferences → Sharing.
3. In the left menu, select Common Internet.
4. In the field General Connection** select Ethernet.
5. In the section "For computers using"** mark Wi-Fi.
6. Click "Wi-Fi Settings"** and ask:
   • 🔑 Network name (For example, Mac_Hotspot).
   • 🔒 Channel — choose Auto or manual (for example, 6 for less interference).
   • 🛡️ Security — WPA2 Personal.
   • 🔑 Password — minimum 8 characters.

Done! Other devices can now connect to your Mac's Wi-Fi. To stop sharing, uncheck the box. "Public Internet"**.

⚠️ Attention: On some models MacBook Air And MacBook Pro without port Ethernet an adapter will be required USB-C/Ethernet (for example, from Apple or Anker). Make sure the adapter supports Gigabit Ethernet for stable speed.

6. Common problems and their solutions

Even with proper setup, errors can still occur. We've compiled the most common ones and how to fix them:

If none of the methods worked, check:

• 🔌 Cable - try another one or connect to a different router port.
• 🖥️ Drivers - update them through device Manager or the manufacturer's website (Intel, Realtek and others).
• 🔄 Router - reset its settings with the button Reset (hold for 10 seconds) and set up again.
• 🛡️ Antivirus/firewall - temporarily disable them and check the distribution.

FAQ: Answers to Frequently Asked Questions

sudo nmcli dev wifi hotspot ifname wlan0 ssid MyLinuxHotspot password "12345678"