When your home internet becomes unstable or you lose access to websites completely, it's often because too many devices are connected to your access point. This could include not only your personal devices, but also devices from neighbors who have found a way to hack your security, or guests who don't want to disconnect from the network. In such cases, the administrator needs to know How to change the number of connections to a WiFi routerto stabilize the network.
Modern routers have flexible tools for subscriber management, but these functions are often hidden deep in the menu or require an understanding of the operating principles. DHCP serversA simple "maximum 5 devices" switch is usually not available in the basic settings, and implementing this requires a comprehensive approach to hardware configuration.
In this article, we will look at various methods of access restriction: from setting up an address pool to using MAC filteringYou'll learn not only how to block unwanted visitors, but also how to intelligently distribute bandwidth among priority devices.
Why is it important to control the list of connected devices?
A wireless network has a limited bandwidth, which is divided among all active clients. If a dozen extra smartphones connect to your router or a torrent client launches on a forgotten tablet, this will lead to a sharp drop in speed and increased ping in online games. Control over client base allows you to guarantee a stable connection for important tasks.
Furthermore, the security of data on a local network directly depends on who has access to it. An unauthorized device that enters your perimeter could potentially scan ports or attempt to access shared folders containing sensitive information. Limiting the number of connections is a fundamental element. cyber hygiene.
There's a common misconception that simply changing a password is enough. However, if a password was once saved on a friend's device or written down in a notebook that fell into the wrong hands, access will remain open. Therefore, using additional barriers, such as MAC address filtering, is a more reliable solution.
⚠️ Note: Some providers limit the number of simultaneous connections on their network. If you've configured your router but your internet connection still drops when you connect a fifth device, check with your provider for details.
It's also worth considering the technical limitations of the hardware itself. Cheap router models can simply choke under the number of active sessions, even if the internet connection is empty. In this case, software-based limiting of the number of clients can help extend the life of the equipment.
Analysis of the current load and identification of outsiders
Before imposing strict restrictions, you need to understand who exactly is consuming your traffic. Most modern routers, such as TP-Link, Keenetic or ASUS, have a built-in traffic monitor. By accessing the web interface, you can see a list of all active IP addresses and their corresponding MAC addresses.
For in-depth analysis, you can use third-party utilities, for example, Wireless Network Watcher or mobile applications like FingThey scan the network and display not only the device name but also the network card manufacturer, which helps identify "unnamed" clients.
- 📱 Check the list of connected devices in your router's app.
- 💻 Use the PC command line with the command
arp -ato view the ARP cache. - 🔍 Compare the number of gadgets you know with the total number of clients.
- ⚡ Pay attention to devices with high network activity in real time.
If you find a device you can't identify, don't rush to change DHCP settings. First, try disabling the suspicious device through the router interface ("Block" or "Ban"). If it reappears in the list after a while, it means it has an automatic reconnection mechanism or saved credentials.
Method of restriction via DHCP server settings
One of the most gentle and effective ways to limit the number of connections is to narrow the pool of addresses issued DHCP serverThe Dynamic Host Configuration Protocol automatically assigns IP addresses to anyone who requests a connection. The default range is often 100 to 199, giving 99 potential locations.
To limit the number of clients, for example, to 10, you need to change the address range. If the router's IP 192.168.0.1, then set the starting address 192.168.0.100 and final 192.168.0.109After saving the settings, the router will only be able to assign 10 addresses. The eleventh device, even if it knows the WiFi password, will receive an "Unable to connect" error or will remain stuck in the "Obtaining IP" status.
This method is advantageous because it doesn't require maintaining complex lists of approved devices. However, it does have a caveat: if you reduce the address pool and old leases don't expire, new devices may not receive IP addresses, even if there's still space in the pool. It's also recommended to reduce the lease time to a minimum, for example, to 1 hour or less.
☑️ Configuring a DHCP pool
Theoretically, an advanced user could assign a static IP address from the desired subnet to their device and bypass this restriction, but for a simpler level of protection, this is a perfectly viable option.
Using MAC filtering for whitelisting
The most reliable method of control is MAC filteringEach network device has a unique physical address hardcoded into the network card. The router can operate in two modes: blocking addresses from a blacklist or, more effectively for our purposes, allowing connections ONLY to devices from a whitelist.
To implement this scheme, you'll need to manually add the MAC addresses of all your trusted devices (phones, laptops, TVs, smart bulbs) to the allowed list. After activating the "Allow listed only" or "Whitelist" mode, any new device, even with the correct WiFi password, will be rejected at the router driver level.
| Filtration type | Operating principle | Level of protection | Difficulty of setup |
|---|---|---|---|
| Blacklist | Blocks specific addresses | Short | Low |
| Whitelist | Allows only known addresses | High | Average |
| Disabled | Access for everyone with password | Base | Absent |
The main drawback of this method is its labor-intensive nature. Every time friends come over and want to connect to your WiFi, you'll have to go into your router settings, find their phone's MAC address, and add it to the list. While this is ideal for a family network, it's not ideal for an office with high staff turnover.
⚠️ Warning: MAC addresses can be spoofed. An attacker who sees the list of approved devices (which is possible with sniffers) can clone the MAC address of a trusted device. However, for a home network, the likelihood of this scenario is extremely low.
Where can I find my MAC address on Android?
Go to Settings → About Phone → General Information (or Status). Your Wi-Fi MAC address will be listed there. On iOS: Settings → General → About.
Setting up a guest network as an alternative
Instead of strictly limiting the main network, many modern routers, such as MikroTik or Zyxel Keenetic, offer a Guest Network feature. This is a virtual access point with a separate name (SSID) and is typically isolated from your main local network.
You can configure the guest network to have its own limits. For example, you can allow a maximum of three simultaneous connections on the guest network and limit their speed to 5 Mbps. You can leave the main network unrestricted or with stricter controls for your devices.
This solution elegantly solves the problem of "how to change the number of connections" by separating traffic streams. Guests receive internet access, but don't consume the entire bandwidth and can't see your network printers or NAS storage. The setting is usually located in the WiFi → Guest Network.
- 🔒 Client isolation prevents guests from accessing your files.
- ⏱ You can set a timer for the guest network to operate (for example, only during the day).
- 🚫 A separate password makes it easier for outsiders to change access rights.
- 📉 Speed limiting protects the main channel from overload.
Using guest mode also allows you to easily "reset" all connected guests with a single "Disconnect All" button or by simply changing the guest zone password, without affecting the settings of your personal devices.
Hiding the network name (SSID) for increased security
Another layer of security that indirectly affects the number of connections is hiding the network name (SSID Broadcast). If the router doesn't broadcast its name, it won't appear in the list of available networks on neighbors' phones. Connections can only be made by manually entering the network name and password.
This isn't full encryption, as experienced users can still detect the hidden network using traffic analyzers. However, it effectively filters out "random" users and automated connection attempts from smartphones that tend to automatically detect open or known networks.
To enable this feature, find the item in the wireless settings Hide SSID or Enable Hidden Wireless and set the value to "Yes" or "Enable." After this, you will have to reconnect all your devices, entering the network name manually.
It's worth noting that on some mobile devices (especially iOS), constantly searching for a hidden network can lead to increased battery consumption, as the phone is constantly polling the airwaves for a familiar SSID.
Frequently Asked Questions (FAQ)
Will DHCP restrictions affect smart home functionality?
Yes, if you set the address pool too small. Smart home devices (lamps, sockets, sensors) also require an IP address. Make sure your Start-End IP limit accommodates all your household gadgets and all automation systems. Otherwise, new bulbs simply won't be added to the network.
What should I do if I blocked myself through a MAC filter?
If you enable the whitelist without adding your current PC, the connection will be lost. The only solution is to connect to the router via a LAN cable (wired). Wired connections are typically not filtered by WiFi MAC filter rules. Go to the interface and disable filtering or add your address.
Is it possible to limit the number of connections for each device separately?
Standard home routers don't have this feature. You can limit the total number of clients. However, advanced systems like MikroTik or OpenWrt allow you to configure complex queues and session limits for each IP or MAC address individually.
Will changing the connection limit reset my router settings?
No, changes to DHCP, MAC filtering, or SSID hiding settings are applied immediately or after a short WiFi service reboot. Your personal data, browser history on connected devices, and other router settings (PPPoE, VPN) will remain unchanged.
Does the number of connections affect router wear and tear?
Yes, indirectly. A large number of active connections puts strain on the device's processor and RAM, which can lead to overheating. If the router operates at its limits 24/7, its lifespan may be shortened. Limiting the number of clients helps reduce the thermal load.