In the digital age, internet speed and stability are critical for work, entertainment, and smart home. Users often notice sudden speed drops or intermittent connection interruptions, even if their data plan offers high bandwidth. One of the most common causes of such issues is unauthorized access to your wireless network.
If neighbors or random passers-by know the password to your Wi-Fi, they can use traffic for free, loading the channel and reducing overall equipment performance. For equipment owners from the operator Rostelecom It is necessary to regularly monitor the list of active connections to ensure the security of your home network perimeter. Modern routers, such as Sercomm, Eltex or Huawei, provide convenient tools for this.
In this article, we'll detail the steps for detecting intruders through the web interface and mobile apps. You'll learn not only how to view a list of connected devices but also how to quickly block them and change security settings to prevent repeat intrusions. Network control is the first step to a stable internet connection.
Symptoms of unauthorized network access
Before adjusting your router's technical settings, it's worth paying attention to indirect signs that may indicate someone is using your Wi-Fi. The first and most obvious sign is a sharp drop in page loading speeds and video buffering during hours when you wouldn't normally experience such issues. If the wireless activity indicator on the router continues to flash rapidly even though all your devices are turned off, this is cause for concern.
Another sign may be the inability to connect your own gadgets due to the exhaustion of the client limit that is supported routerBudget models are often limited to 10-15 simultaneous connections, and if someone occupies these slots, you won't be able to access the network. You should also be wary if your antivirus software starts reporting port scanning attempts or suspicious activity from the local network.
⚠️ Warning: Even if your internet speed is acceptable, the presence of unknown devices on your network poses a risk of personal data leakage. An attacker within your perimeter could theoretically attempt to access shared folders or intercept unencrypted traffic.
For initial diagnostics, you don't need to immediately delve into complex settings. Simply observe the behavior of the indicators on the device's front panel. RostelecomIf the light bulb WLAN or Wi-Fi Flashing rapidly when all your phones and TVs are off or in airplane mode means there's active data exchange. This could be a background app update on your devices, but it could also indicate activity from an outside source.
Login to the Rostelecom router control panel
To get precise information about who is using your access point, you need to log in to the device's administrative panel. This is the central control unit where all technical parameters are displayed. The standard address for logging into the router interface Rostelecom (Sagemcom, Sercomm, Eltex) most often looks like this 192.168.1.1 or 192.168.0.1Some new models use a domain name, for example, rt or router.
The login process requires your device (laptop or smartphone) to be connected to the router's network. Open any browser and enter the IP address in the address bar. The system will ask for a username and password. By default, credentials are often listed on a sticker on the bottom of the device: login admin and password admin or a unique code. If you've previously changed your login details and have forgotten them, you'll need to reset your device to factory settings using the button. Reset.
The interfaces of different models may differ visually, but the logic remains the same. After successful authorization, you'll be taken to the main status page, which displays the WAN connection type, Wi-Fi status, and device uptime. This is where we'll navigate to the client monitoring sections. It's important to use a browser that doesn't block pop-ups or scripts, as older router interfaces can be sensitive to browser security settings.
Analyzing the list of connected clients via the web interface
After logging into the control panel, you need to find the section responsible for wireless connections. In routers Rostelecom It may be called differently depending on the firmware: Wireless, WLAN, Wi-Fi or Wireless networkWithin this menu, you should look for a subsection with the status or list of stations. Often it is called Station Information, Associated Devices or Client list.
A data table will appear in the window that opens. Here you'll see the MAC addresses of all devices currently connected, their local network IP addresses, and their uptime (the length of time the connection has been active). MAC address — is a unique identifier of a network interface, which consists of six pairs of hexadecimal numbers (for example, A4:5E:60:C2:11:09). This parameter is the easiest way to identify a device if you keep track of your equipment.
Modern interfaces, such as those found in routers Sercomm or new ones Eltex, often display not only the raw numbers, but also the chip manufacturer's name (Vendor Name), which makes the task much easier. You may see names like Samsung, Apple, Hon Hai Precision (often Foxconn) or Espressif (for smart plugs and lamps). This allows you to immediately understand whether it's a phone, laptop, or IoT gadget.
| Parameter | Description | Example of meaning |
|---|---|---|
| SSID | The name of the wireless network to which the device is connected | Home_WiFi_5G |
| MAC Address | Physical address of the client network adapter | 00:1A:2B:3C:4D:5E |
| IP Address | Local address issued by the router via DHCP | 192.168.1.45 |
| Lease Time | The time for which the IP address is issued (in seconds or h:m:s) | 86400 (24 hours) |
For ease of analysis, it's recommended to write down all the MAC addresses of your devices and compare them with the list in your router. If the table contains rows with unknown identifiers that you can't match to any device in your home, there's a high probability of unauthorized access. Some firmware versions have a button. Refresh or Refresh, which allows you to get the current status of connections in real time.
☑️ Checking the client list
Using a mobile app for monitoring
Operator Rostelecom actively promotes the use of the mobile application Rostelecom Key (or RT-K (Depending on the region and hardware model) for managing your home network. This method is most convenient for users who don't want to navigate complex web interface menus. The app allows you to control the network remotely while away from home, which offers an additional advantage.
After installing the app and linking your router (usually by scanning the QR code on the sticker or entering the serial number), the main panel opens. Here in the section My devices or Clients A graphical list of all connected devices is displayed. The app's interface is more user-friendly: devices are often sorted by type (smartphones, PCs, TVs) and have clear icons.
The main advantage of the mobile method is the ability to react instantly. If you see an unfamiliar device, you can block its network access with a single tap directly from your phone. The app sends a command to the router, and the intruder is immediately disconnected. Furthermore, many versions of the app allow you to create guest networks with a limited time, eliminating the need to share the password for your main network.
⚠️ Note: App functionality may vary depending on your router model. Older devices running legacy firmware may not be supported by newer software versions. Rostelecom KeyIn this case, use the web interface.
Blocking Intruders and Protecting Your Network
If you detect a foreign device, you must immediately take action to block it. The simplest, but not the most reliable, method is to use the Blacklist (Blacklist) in the router settings. In the section Wireless -> Filter or Access Control You can add the intruder's MAC address to the blacklist. After applying the settings, the device will lose connection and will be unable to reconnect, even with the password.
However, an experienced user can spoof (change) their adapter's MAC address and bypass the blacklist. Therefore, the only reliable solution is to completely change the Wi-Fi security key. Go to the wireless network settings (WLAN Security or Wi-Fi Password), select the encryption type WPA2-PSK (or WPA3(if supported) and set a strong password. After saving the settings, all devices will be disconnected, and you'll only need to reconnect your device.
To enhance protection, it is recommended to disable this function. WPS (Wi-Fi Protected Setup). This technology allows you to connect to the network by pressing a button or entering a PIN, but it has known vulnerabilities that allow attackers to brute-force the password. In the router interface, find the section WPS and set the value Disable or Off.
What should I do if I forget my password after changing it?
If you've changed your Wi-Fi password and forgotten it, but need to connect urgently, you can view it in the settings of an already connected Windows PC. Go to Network and Sharing Center -> Wireless Network Properties -> Security tab -> Check "Show characters as you type."
Setting up MAC address filtering (Whitelist)
For users who want to ensure the highest level of security, there is a mode Whitelist (Whitelist). Unlike a blacklist, this mode allows network access ONLY to devices whose MAC addresses are included in the allowed list. All other devices, even with the correct Wi-Fi password, will be unable to access the internet.
The implementation of this function is in the section Wireless -> MAC FilterYou need to switch the filtering mode to Allow (Allow) and manually add the MAC addresses of all your trusted devices: phones, laptops, TVs, and smart speakers. This is a labor-intensive process, especially if you have many devices, but it ensures that no one else connects to your network.
Keep in mind that when enabling Whitelist, you must be very careful when adding new devices. If you buy a new smartphone or have guests over, you'll have to go into your router settings and manually enter their addresses each time. For most home users, the optimal balance is using a complex password and regularly checking the client list.
Frequently Asked Questions (FAQ)
Can my neighbor see my files if he is connected to Wi-Fi?
By default, modern operating systems (Windows, macOS, Android) ask you to select the network type when connecting to a new network. If you select "Public Network," your computer is hidden from others, and file access is blocked. However, if you select "Private Network" and have network discovery enabled, there is a theoretical risk of accessing shared folders. We recommend always using complex passwords and not enabling file sharing unless necessary.
Why are there devices named "Unknown" in the client list?
This occurs when the router cannot recognize the network adapter manufacturer based on the first three bytes of the MAC address (OUI). This often happens to devices with Chinese network cards, some models of smart plugs, CCTV cameras, or older gadgets. If the number of such devices matches the number of devices you have, there's no need to worry.
Will changing the Wi-Fi password reset the router settings?
No, changing your wireless network password does not affect other router settings, such as your ISP connection type (PPPoE, IPoE), IPTV, or telephony settings. However, all wireless devices will be disconnected, and you will need to re-enter the new password on each one. The router settings themselves (admin login and password) will also remain unchanged.
How often should I change my Wi-Fi password?
In a home environment, frequent password changes (e.g., monthly) aren't strictly necessary if you use a strong encryption key (WPA2/WPA3) of 12+ characters. Changing your password is sufficient if you suspect it's been compromised or if you've shared it with a large number of guests. For office networks, the recommendations may be stricter.