How to limit the internet speed of other WiFi users

In the age of widespread video streaming and online gaming, connection stability is critical for every home network user. When family members or connected guests start downloading large files, this often leads to lag, buffering, and an inability to work comfortably. It's at times like these that it becomes crucial to learn how to limit the internet speed of other Wi-Fi users to regain control of the connection.

Modern routers offer extensive traffic management capabilities, but many equipment owners still use basic security settings. Bandwidth control It allows you not only to disable unwanted devices but also to flexibly distribute network resources. This is especially relevant for small offices or apartments where more than ten devices may be connected simultaneously.

In this article, we will look at the technical aspects of setting up routers of various brands, and consider the concept QoS (Quality of Service) and learn how to effectively manage connected clients. You'll learn how to identify rogue devices and which tools are best suited for your specific router model.

⚠️ Note: Router admin panel interfaces are constantly updated by manufacturers. The location of specific menu items may vary depending on your device's firmware version.

Analysis of the current network load and identification of consumers

Before resorting to strict restrictions, it's important to pinpoint who is consuming the lion's share of your traffic. A standard router control panel usually includes a section displaying a list of all active connections in real time. Modern models offer this feature. TP-Link, Asus or Keenetic This information is often presented in the form of convenient graphs or charts.

Pay attention to the option that may be called "Statistics," "Clients," or "Wireless Connection List." This displays the IP addresses, MAC addresses, and current data transfer speed for each device. Identification of the offender — the first step towards stabilizing the network, since without accurate data any restrictions will be blind.

It's often difficult to determine which device a particular address belongs to if device names aren't manually assigned. In this case, it's helpful to temporarily disable suspicious devices or compare MAC addresses in the smartphone and laptop settings. Some advanced systems can automatically detect the device type, labeling it as "iPhone," "Smart TV," or "PC."

• 📱 Check the list of active connections in the router's web interface.
• 🔍 Compare the MAC addresses of unknown devices with the physical labels on the gadgets.
• 📊 Pay attention to the "Channel Load" or "Upload/Upload Speed" columns.
• 🔌 Temporarily disable Wi-Fi on your devices to isolate other people's connections.

How QoS technology works for traffic management

Technology Quality of Service Quality of Service (QoS) is the primary tool for prioritizing traffic in home and office networks. It allows the router to intelligently distribute available bandwidth, prioritizing certain types of data or specific devices. Without QoS, the router processes data packets in the order they arrive (FIFO), which can lead to delays in mission-critical applications.

There are two main approaches to implementing this feature: app-based prioritization and device-based limitation. In the first approach, you prioritize video conferences or online games over background downloads. In the second approach, you set strict speed limits for each connected device, which is a more radical but effective method.

Setting up QoS Requires an understanding of how your connection works. If your ISP offers dynamic speeds, automatic configuration may not work correctly, so you often need to manually enter your ISP's maximum download and upload speeds. This will allow the router's algorithms to correctly calculate percentages and limits.

Setting up speed limits on TP-Link and Asus routers

Routers from companies TP-Link And Asus These are among the most popular on the market, and their interfaces have their own unique features. In TP-Link devices with the new Tether interface or the standard web interface, the function is often called "Control" or "Bandwidth Control." You need to go to the appropriate section, enable the function, and create new rules.

To create a limiting rule, you need to specify the IP address of the target device (or address range) and set the maximum speed in kilobits per second. It's important to understand the units of measurement: providers specify speed in megabits (Mbps), while router settings often use kilobits (Kbps). Conversion of units — a common mistake that causes users to set limits 1000 times lower than necessary.

In routers Asus With AsusWRT firmware, traffic management is implemented via the "Adaptive QoS" or "Traffic" tab. Here, you can visually drag and drop devices into groups with different priorities or set hard limits in the "Bandwidth Limiter" section. The interface is more user-friendly and allows you to see the load in real time.

When setting up, always leave a small amount of bandwidth to cover the router's system needs and background processes. Completely blocking or setting the limit to zero may lead to instability in some smart devices that require constant, albeit minimal, data exchange with servers.

Traffic restrictions on Keenetic and MikroTik equipment

Devices Keenetic (formerly Zyxel Keenetic) are renowned for their flexible KeenOS operating system, which features a very logical priority management system. In the "Device List" (Clients) section, you can select a specific device and directly set its priority (High, Normal, Low) or establish a strict speed limit in its properties. This eliminates the need to create complex rules, allowing you to work with each client individually.

For users MikroTik The process is more complex, but it provides maximum control. It uses the "Simple Queues" mechanism. You'll need to create a new queue, specify the IP address of the device being limited in the Target field, and set the limits in the Max Limit fields. The syntax requires specifying the speed in the format "upload_speed/download_speed," for example, 1M/5M for 1 megabit of upload and 5 megabits of download.

Mikrotik It also allows you to create complex queue trees where you can group users and apply common rules to them. This is ideal for offices or hostels where you need to restrict access to an entire group of guests without affecting the administrative portion of the network.

MAC address filtering as an access control method

One of the most reliable ways to control access is filtering by MAC addressesEach network adapter has a unique identifier that can be used to create whitelists or blacklists. Unlike IP addresses, which can change, MAC addresses typically remain constant (unless the user specifically changes them at the OS level).

In the Wireless MAC Filtering settings, you can select "Deny" or "Allow." "Deny" allows you to specify specific devices that will be fully or partially restricted from accessing the network. However, MAC filtering often simply blocks connections rather than limits speed, so it's best combined with QoS rules.

There's a caveat worth noting: modern iOS and Android operating systems use a feature called "Private Wi-Fi Address." This means the smartphone can generate a random MAC address for each new network, making static filtering less effective. In such cases, it's necessary to either disable this feature on the client's device or use other control methods.

• 🛡️ Find the MAC filter in the "Security" or "Wireless" section.
• 📝 Copy the exact MAC addresses of the devices that require restriction.
• ⚙️ Select the "Deny" mode to create a blacklist.
• 🔄 Consider the ability to change the MAC address in modern smartphones.

Guest network as a solution to the congestion problem

Instead of manually limiting the speed for each guest or family member, it's much more efficient to use the "Guest Network" feature. This is an isolated segment of your Wi-Fi network with its own security settings and, most importantly, its own speed limits. For example, you can allocate only 20% of the total bandwidth to guests, leaving the rest for your own use.

Setting up a guest network takes just a couple of minutes: simply enable the feature, set a name (SSID) and password, and then find the speed limit setting for this segment. All devices connected to the guest Wi-Fi will share this limited resource without affecting the main network.

This also improves security because guests cannot access your local resources, network-attached storage (NAS), or printers. A guest network is the only correct solution for temporarily granting strangers access to your internet without risking your main infrastructure.

⚠️ Important: Make sure your router supports separate speed settings for the guest network. On some budget models, guest mode only isolates devices but does not limit their speed separately from the main network.

Frequently asked questions and troubleshooting

Why is the internet on my device unstable after setting restrictions?

A speed limit that's too low can cause timeouts when loading heavy pages or updating apps. Another issue could be that you've limited only uploads or downloads, disrupting the balance. Try increasing the limit or checking if you have parental controls enabled that interfere with QoS.

Is it possible to limit the speed of a specific application, for example, a torrent?

Yes, if your router supports DPI (Deep Packet Inspection) or has built-in features for blocking P2P traffic. This is difficult with simpler models, as the router only sees the data stream, not its content. In such cases, it's more effective to limit the speed of the entire device.

Will the restriction settings be lost after resetting the router?

Yes, a factory reset will delete all configurations, including QoS rules and MAC filters. After the reset, you'll need to reconfigure your internet connection and speed limiting rules. We recommend backing up your configuration before making any complex changes.

Does per-user speed limiting affect overall Wi-Fi speed?

Yes, positively. The Wi-Fi radio channel is half-duplex, meaning devices transmit data one at a time. If one device doesn't "clog" the airwaves with unnecessary packets due to the limitation, airtime is freed up for other devices, which improves overall network responsiveness.