How to connect a Xiaomi router 4C Internet access via Ethernet cable: a complete guide

Introduction: Why Xiaomi 4C wire-connection?

Router Xiaomi Router 4C — A compact and budget device that is often used to distribute Wi-Fi in apartments and small offices. But not everyone knows that it can be connected to the Internet not only through PPPoE (as the default providers do), but also directly through an Ethernet cable from a modem or provider equipment. ONT-DocSis cable internet, or you want to use Xiaomi 4C as a secondary router in the network.

In this article, we will analyze the unique feature of Xiaomi 4C: his WAN-port at the same time LAN-You can use the port at certain settings, which allows you to configure the network flexibly, and you can learn how to connect cables correctly, adjust the type of connection (static). IP, dynamic DHCP or PPPoE), and also solve typical problems such as "no Internet access" or "router does not issue" IP". This guide is suitable for both beginners and experienced users who want to optimize their network.

Before you start, make sure you have:

• 🔌 Router Xiaomi Router 4C powered (5V/1A).
• 📡 Ethernet cable (twisted pair) category 5e or higher (length up to 100 meters).
• 💻 Computer, laptop or smartphone for setting up (you can connect via Wi-Fi or cable).
• 📄 Data from the provider: connection type, login/password (if PPPoE), static IP (if required).

1. Physical connection of the router to the network

The first step is to connect Xiaomi correctly. 4C It has three ports, one of them. WAN/LAN (is indicated in blue) and two LAN (Depending on the scenario, the connection will differ.

If you are connected to a modem or ONT-terminal (for example, from Rostelecom, Beeline, MTS), use WAN/LAN-port on the router. If Xiaomi 4C It will work as a secondary router on the network (for example, after the main router), you can use any of the ports – but then you will need additional settings of the mode of operation.

⚠️ Note: If you are connecting Xiaomi 4C router through WAN-port, make sure that the main router is IP-Addresses on the same subnet as Xiaomi (default 192.168.31.1) Otherwise, devices will not see each other and the Internet will not work.

2. Log in to the router's web interface

After the physical connection, you need to go to the Xiaomi control panel 4C. For that:

1. Connect your computer or laptop to the router via LAN-port (yellow) or connect to its Wi-Fi (network will be called Xiaomi_XXXX, where XXXX — last-minute MAC-address).
2. Open your browser and type in 192.168.31.1 or miwifi.com. If the page doesn't open, check your network settings on your PC:

IP-The PC address must be in the range 192.168.31.2-192.168.31.254|

Default gateway: 192.168.31.1|

DNS-server: 192.168.31.1 or public (e.g. 8.8.8.8)|

Turn it off. VPN browser-based proxy

-->

If you see the authorization window, enter the login and password (by default — admin/admin Some firmware may require a link to your Mi Account, in which case follow the instructions on the screen.

⚠️ Note: If after entering miwifi.com the browser redirects to the search engine, clear the cache DNS. In Windows, it's done by a team:

ipconfig /flushdns

On macOS or Linux, use:

sudo dscacheutil -flushcache  # macOS


sudo systemd-resolve --flush-caches  # Linux (Ubuntu/Debian)

3.Tune in. WAN-connection

After logging into the web interface, go to the Settings section → Internet (or Advanced) → WAN Here you need to choose the type of connection that your provider supports. Let's look at three main options:

Dynamic IP (DHCP)

The easiest method, which is used by most providers (for example, Rostelecom in some regions, Dom.ru).

• 🔄 Type of connection: Dynamic IP (DHCP).
• 🔄 MAC-Address: Leave by default or clone MAC your PC if the provider is tied to it.
• 🔄 DNS: You can leave automatic or indicate public DNS (e.g. 1.1.1.1 and 8.8.8.8).

Click Save and wait for the router to restart. If the Internet is not working, check if the indicator is on. WAN on the front panel (must flash or burn constantly).

Static IP

Some providers (for example, Beeline for corporate clients) issue fixed IP-addresses, in this case:

• 🔢 Select Static. IP.
• 🔢 Fill in the fields: IP-address: for example, 10.10.10.2 (check with the provider) Subnet mask: usually 255.255.255.0. Main gateway: address of the provider gateway (for example, 10.10.10.1). DNS: Please indicate primary and secondary DNS (8.8.8.8 and 8.8.4.4 can be used).

PPPoE (the most common variant)

If your provider uses login/password authorization (for example, MTS, TTK), select:

• 🔑 Type of connection: PPPoE.
• 🔑 Enter the User Name and Password (from the contract with the provider).
• 🔑 Indicate. MTU: Usually 1480 (if you don't know, leave by default).
• 🔑 Turn on the automatic connection.

💡

If you don’t know the type of connection, call the provider’s support and ask: “What protocol is used to connect to the Internet: DHCP, PPPoE or static IP?"

4. Connection check and error correction

Once you save the settings, the router will restart to check if the Internet is working:

1. Connect the device (PC, smartphone) to Xiaomi 4C via Wi-Fi or cable.
2. Open your browser and try to access any website (for example, ya.ru).
3. If the site does not open, check:

• 🔍 Are the indicators on fire? WAN Internet on the router (must burn green or blue).
• 🔍 Go to the web interface (192.168.31.1) and check the status of the connection in the section Status → Internet.
• 🔍 If the status is "Connected" but the Internet is not working, try manually specifying the status. DNS (e.g. 1.1.1.1).

⚠️ Note: If you see an error in the connection status "PPPoE: Authentication failed", check:

• Correct login / password (registrar is important!).
• The presence of spaces or extra symbols in the fields.
• Does the provider block the connection to the MAC-address (try to clone) MAC your PC).

5. Additional settings for optimization

After a successful connection to the Internet, you can improve the network:

5.1 Wi-Fi setup

Go to Settings. → Wi-Fi and:

• 📶 Set a unique network name (SSID) (Don't use the standard. Xiaomi_XXXX).
• 🔒 Select the type of security: WPA2-PSK (most reliable).
• 🔑 Set a complex password (at least 8 characters, with numbers and letters).
• 📡 Select a channel: if there are many networks, use Auto or manual selection (for example, 6 or 11 for 2.4 GHz).

Update of firmware

Xiaomi routers regularly receive updates that correct errors and add features.

1. Go to Settings. → Firmware update.
2. Click Check for updates.
3. If a new version is available, download and install it (the router will restart).

💡

After updating the firmware, reset the router to factory settings (reset button for 10 seconds) if you have connection problems.

5.3 Parental control and guest network settings

If you have children or guests on your network, it is recommended that:

• 👨‍👩‍👧‍👦 Create a guest network (Settings) → Guest network with limited access to local devices.
• ⏰ Set up an access schedule (Settings) → Parental controls to limit Internet usage time.

6.Use of Xiaomi 4C secondary

If you want to expand Wi-Fi coverage or set up a separate network, Xiaomi 4C You can connect to the main router:

1. Connect Xiaomi 4C router through LAN-port).
2. Go to the Xiaomi settings 4C and:

• 🔄 Turn it off. DHCP-server (Settings) → Local area network → DHCP → Shut down).
• 🔄 Change. IP-router address so that it does not conflict with the main router (for example, 192.168.31.2, if the main router has 192.168.31.1).
• 🔄 Set up Wi-Fi with a different name (for example, MyNetwork_5G for the main network and MyNetwork_Ext Xiaomi 4C).

⚠️ Note: With this connection, all devices will be on the same network, but they can only be managed through the main router. If you want to split networks (for example, for the office), use Bridge mode, but Xiaomi 4C It does not support it at the software level – you will need an alternative firmware like OpenWRT.

FAQ: Frequent questions about Xiaomi connection 4C