A situation where the user does not need to increase, but, on the contrary, artificially limit Wireless network throughput optimization is less common than standard optimization. It's most often required by system administrators to emulate poor connection conditions when testing applications or by parents who want to monitor their children's internet time. In their default factory settings, routers always strive to provide maximum throughput. throughput, ignoring the need for artificial channel throttling.
The solution to this problem depends on your hardware model and firmware. In some cases, changing the default security protocol or channel width is sufficient, while in others, installing third-party software is required. It is important to understandthat reducing the speed at the radio module level will affect all connected devices unless advanced filtering features are used.
Before making changes, it's worth assessing the risks. Incorrect configuration can lead to complete network inoperability or address conflicts. Below, we'll cover proven methods, from simple frequency manipulation to complex QoS settings.
Why do you need to slow down your internet speed at all?
At first glance, the idea of slowing down your own equipment seems counterintuitive. However, in a professional environment low speed emulation Throttling is a standard practice. Mobile app and website developers test their products under conditions simulating 2G or EDGE networks to ensure the interface functions correctly even with dropped packets.
Another common scenario is parental control (Parental Control). Drastically reducing the speed for certain devices makes watching videos or playing online games impossible, encouraging children to put their devices down without completely blocking access to educational resources. This also helps relieve bandwidth congestion if someone starts downloading torrents during work hours.
⚠️ Attention: Reducing the speed at the physical channel level (for example, switching to the 802.11b standard) will affect All Connected devices. If you want to restrict access to just one device, use MAC address filtering or QoS settings.
Sometimes, limiting is necessary for older IoT devices that can't handle high-speed data flows and begin to lose connection. In such cases, stability more important than the volume of information transmitted.
Changing the wireless standard and channel width
The simplest and most effective way to reduce network speed globally is to switch the radio module's operating mode to an outdated standard. Modern routers support 802.11ac (Wi-Fi 5) and 802.11ax (Wi-Fi 6), providing gigabit speeds. Forced transition to the mode 802.11b/g will cut the maximum speed to 11 or 54 Mbps respectively.
To perform this operation, log in to the router's web interface, usually accessible at 192.168.0.1 or 192.168.1.1. Find the section Wireless or Wi-Fi settings. In the parameter Mode or Wireless Mode select a value 802.11b or 802.11b/g mixedThis action will automatically reduce both speed and coverage range, as older standards are less resistant to interference.
Additionally, you can reduce the channel width. If you have a value Auto, 40 MHz or 80 MHz, change it to 20 MHzThis narrows the "pipe" through which data is transmitted, which also has a positive effect on stability in apartment buildings, but reduces peak performance.
Using QoS to restrict devices
Function Quality of Service QoS (Quality of Service) was originally designed to prioritize traffic, but it's also ideal for limiting it. Unlike changing communication standards, QoS allows you to apply rules to specific IP addresses or MAC addresses without affecting the rest of the network.
Find the section in the router menu QoS or Bandwidth Control. Activate the feature and set general limits for the ascending (Upload) and outgoing (Download) streams. Then create a rule specifying the MAC address of the target device and the desired speed in kbps. For example, setting the limit to 100 kbps will make watching YouTube in HD impossible.
Some advanced firmwares such as OpenWrt or DD-WRT, allow you to create complex queues based on packets TCP/UDPThis makes it possible to throttle only certain types of traffic, such as torrents or game servers, while keeping web surfing fast.
☑️ QoS settings
Setting up a guest network with restrictions
If you need to provide access to guests or children, but you don’t want them to take over the entire channel, the optimal solution is to create guest network (Guest Network) is an isolated Wi-Fi segment to which separate security and speed rules can be applied.
In the router interface, go to the section Guest NetworkCreate a new SSID (network name) and set a password for it. The key is to find the speed limit settings specifically for the guest profile. In routers Keenetic, MikroTik and some models TP-Link With the new firmware this is done through an access profile.
The advantage of this method is that the main network remains fast and secure. You can disable guest access or change its settings at any time without reconfiguring your main smart home devices or work computers.
⚠️ Attention: Not all budget router models allow speed limiting specifically for guest networks. In such cases, the guest network serves only to isolate the local network, not to control traffic.
Comparison of speed limiting methods
The choice of method depends on your ultimate goals and technical savvy. Below is a table comparing the main speed reduction methods based on their effectiveness and implementation complexity.
| Method | Impact on the network | Complexity | Flexibility |
|---|---|---|---|
| Change of standard (802.11b/g) | Global (all devices) | Low | Low |
| Setting up QoS | Local (device specific) | Average | High |
| Guest network | Segmented (device group) | Average | Average |
| Changing the channel to 20 MHz | Global (capacity reduction) | Low | Low |
As the table shows, QoS is best suited for targeted work. However, if the goal is to slow everyone down for the sake of an experiment, the simplest solution is to change the communication standard. The only way to get absolute control over the speed of every byte is to use third-party firmware.
Advanced Methods: OpenWrt and DD-WRT Firmware
Manufacturers' factory firmware often has limited functionality. Installing alternative firmware, such as OpenWrt, transforms a regular router into a powerful network computer. Here, speed limiting is implemented through a packet system. sqm-qos or tc (traffic control).
In OpenWrt, you can create complex rules based not only on the address, but also on time of day, ports, and even packet content. For example, you can configure a rule: "From 8:00 PM to 11:00 PM, limit the speed of the device with MAC address XX:XX:XX to 128 Kbps."
To install this firmware, you need to know the exact chipset model of your router. The process requires caution, as an error can brick the device. However, the result provides professional-level network management.
Risks of flashing a router
Installing third-party software voids the device's warranty. If the power supply is interrupted during the flashing process or the wrong file version is selected, the router may become unusable. Recovery is only possible via the UART console or a programmer, which requires soldering skills.
Frequently Asked Questions (FAQ)
Is it possible to limit the speed for just one app, like YouTube?
On standard routers, no, as they don't have the ability to analyze the content of HTTPS traffic (DPI). This requires gateways with deep packet filtering or specialized software at the device operating system level.
Will reducing Wi-Fi speed affect my wired (LAN) connection speed?
No, wireless module settings (Wireless) do not affect Ethernet ports. However, if you use QoS to limit the overall internet bandwidth, this will also affect wired clients, since the limitation occurs at the WAN port level.
Will ping (latency) decrease when speed is reduced?
It's paradoxical, but yes. When using the right QoS (for example, an algorithm FQ_Codel) Reducing the maximum speed can remove bufferbloat, making the network response more responsive despite the lower throughput.
How do I reset all my settings back?
Simply reset the router to factory settings by holding down the button Reset on the case for 10-15 seconds, or manually return the parameters in the section Wireless Mode for meaning Auto or 802.11ac/ax mixed.