Modern wireless router While a network can support dozens of active devices, providers or equipment settings often limit this list by default. This is done to prevent channel congestion and ensure a stable internet connection for the primary user. If you're experiencing problems with a new smartphone or smart light bulb, even though there's plenty of space, it means there's an artificial barrier in place.
You can change the number of allowed connections through the admin web interface. This process doesn't require advanced programming knowledge, but it does require careful input. DHCP serversIn this article, we'll discuss how to find hidden settings, where to find the client number slider, and what nuances affect the actual throughput of your home network.
It's important to understand that software limitations and hardware capabilities are two different things. Even if you allow connections for a hundred devices, a budget router could simply choke under the volume of requests. Therefore, it's important to evaluate the performance before making any changes. hardware resources your gadget.
Understanding hardware and provider limitations
The first step should always be to diagnose the current situation. Many users mistakenly believe that the restriction is coming from the provider, when in fact, the blocking occurs at the service level. local routerISPs rarely limit the number of devices within your local network; they only care about traffic volume. Your router is the main bottleneck.
Each model has its own limit on the number of simultaneous connections in the NAT table. For simple home models, this limit is often 10-15 active clients. More powerful gaming or office models ASUS or Keenetic They can store state tables for up to 64 or more devices. Exceeding this limit results in new devices simply not receiving an IP address.
⚠️ Warning: Increasing the number of connections without sufficient processor power will result in a drop in internet speed on all devices and occasional disconnections.
It's also important to distinguish between "connected devices" and "active clients." The admin panel list may display all devices ever detected, even if they're currently dormant. Only those currently transmitting data create the actual load. To get the true picture, use the built-in traffic monitoring.
You can determine the current limit by looking at the range of addresses assigned automatically. If the address pool is small, there will be few clients. Expanding this pool is the first step to solving the problem. However, keep in mind that DHCP protocol has its own peculiarities of time rental, which we will discuss further.
Configuring the DHCP server address range
The primary tool for managing the number of clients is configuring a DHCP server. This service assigns unique identifiers (IP addresses) to each incoming device. By default, many routers, for example, TP-Link or D-Link, the address range is limited to a narrow sector, for example, from 192.168.0.100 to 192.168.0.110. This gives only 11 slots for gadgets.
To increase the number of available locations, you need to expand this range. Go to the LAN settings and find the DHCP section. Change the pool's end address. For example, setting the range from 192.168.0.100 to 192.168.0.250 will give you 151 possible connections. This is more than enough for any smart home.
☑️ Checking DHCP settings
When changing settings, it's important not to conflict with static addresses. If you manually assigned IP addresses to a printer or security camera, make sure the new extended DHCP pool doesn't overlap these reserved values. It's best to reserve the lower range for static addresses and use DHCP for the upper range.
The lease time is another important parameter. If set too short, the router will constantly recheck for clients, putting a strain on the processor. If set too long, the address book will quickly fill up with "dead souls" of devices that have already left the network but are still technically taking up space. The optimal value for a home network is 120 minutes or 1440 minutes (day).
Expanding capabilities through a guest network
A great way to bypass the connection limitation on your main network is to enable guest Wi-Fi. Many users ignore this feature, thinking it's only useful for guests. However, a guest network is actually second virtual router inside your physical device with its own address pool and limits.
By enabling a guest network, you double the number of available connection slots. If the main network reaches its 32-device limit, the guest network can accommodate the same number of additional devices. This is ideal for connecting smart home devices that don't require access to local resources (file storage or printers).
Guest access settings are usually located in the section Wireless → Guest NetworkHere you can set a separate network name (SSID) and password. It's important to note that traffic on a guest network is often isolated, which increases security. Your smart teapots won't be able to access a computer with important data, even if a vulnerability is discovered in the system.
Why might a guest network be slower?
Some router models programmatically limit the guest network speed to maintain priority for the primary user. Check your QoS settings to remove speed limits if possible.
Using guest mode also allows you to apply individual filtering rules. You can block access to certain websites for devices on this network or limit their operating time. This makes this method not only a way to increase capacity but also a parental control tool.
Hiding the SSID and manually connecting devices
One of the most effective, albeit less convenient, control methods is hiding the network name (SSID). When a network is hidden, it doesn't broadcast its presence. Devices can't simply connect to it automatically, even if they know the password. This creates a barrier to accidental connections from neighbors.
To connect a new device, you'll have to manually enter the network name and password on each device. This discourages "passive" traffic consumers. In the wireless settings, you'll need to find the option Broadcast SSID or Hide network name and switch it to the state Disable or Hide.
This method doesn't increase the technical limit of the NAT table, but it helps keep the number of active clients within reasonable limits, leaving room for truly essential devices. Furthermore, a hidden network is less likely to show up on Wi-Fi scanners run by nosy neighbors, improving overall privacy.
| Parameter | Regular network | Hidden network | Impact on limit |
|---|---|---|---|
| Visibility | Visible to everyone | By name only | Reduces the number of requests |
| Connection | Automatic | Manual input | Access control |
| Security | Average | High | Scan protection |
| Convenience | High | Low | It takes time |
However, this method has a caveat. Some operating systems, especially those on smartphones, can constantly search for hidden networks and drain battery power if they've previously connected. Therefore, use this method only if you're comfortable manually managing the list of trusted devices.
Using dual-band routers (2.4 and 5 GHz)
Modern routers often operate in two bands: 2.4 GHz and 5 GHz. This isn't just a matter of speed, but also a matter of capacity. By dividing devices between the two frequencies, you effectively create two independent service queues. The 2.4 GHz band has a longer range, but is narrow and noisy.
The 5 GHz band offers greater bandwidth and is better suited to handling multiple connections. By moving heavy devices (4K TVs, gaming consoles, laptops) to the 5 GHz band, you'll free up 2.4 GHz bandwidth for dozens of smaller smart home sensors. This indirectly allows you to connect more devices without losing stability.
In your router settings, make sure that the function is enabled. Smart Connect (network aggregation) is disabled if you want to manually manage the distribution. Give the networks different names, for example Home_WiFi And Home_5GThis will allow you to selectively send new gadgets to a less crowded frequency.
It's worth noting that some older devices may not support 5 GHz. In this case, they will remain in the 2.4 band, creating competition. Regularly check your client list and migrate powerful devices to the higher frequency, making room for "small" devices.
Advanced Methods: MAC Filtering and Third-Party Firmware
When standard tools aren't enough, MAC filtering can help. This is a "blacklist" or "whitelist" of devices. You can strictly define a rule: only devices with specific MAC addresses can connect. This provides complete control, but requires manually adding each new device to the allowed list.
For enthusiasts, there is the option of installing alternative firmware, such as OpenWrt or DD-WRTThey remove many software limitations imposed by manufacturers. These systems allow for fine-tuning queues, priorities, and connection limits, turning a regular router into a powerful network device.
⚠️ Warning: Installing third-party firmware (reflashing) will void the device's warranty. If done incorrectly, the router may become bricked and become inoperable.
Before experimenting with firmware, be sure to check the support forums for your specific model. Not all routers are compatible with alternative firmware. If you're unsure, it's best to stick with the standard interface, which also provides sufficient functionality for most tasks.
Frequently Asked Questions (FAQ)
Why does the router say "unable to obtain IP address"?
Most likely, the DHCP address pool has run out. All available numbers (for example, 100 to 110) have already been allocated to other devices. You need to expand the range in your router settings or disable the old devices.
Does the number of connections affect internet speed?
Yes, directly. The bandwidth is shared among all active users. If 30 devices start downloading updates simultaneously, the speed on each device will drop to a minimum, even if the provider's plan is very fast.
Is it possible to connect 100 devices to a regular router?
Theoretically, it's possible by changing the settings, but a technically cheap router will likely freeze. The NAT table will overflow, and the internet will be lost for everyone. For 50-100 devices, professional access points are needed.
How to find out the MAC address of a device for filtering?
In your phone or laptop settings, this is listed in the "About Phone" or "Network Information" section. The MAC address is also always displayed in the client list in the router's admin panel when the device is connected.