Modern users rarely consider the number of gadgets in their home until they encounter the "Unable to connect" message on a new smartphone. Often, the cause isn't hardware failure, but rather the exhaustion of the address limit or a software limitation imposed by the manufacturer or provider. Router simply stops issuing IP addresses to new clients, considering the network to be overcrowded.
Solving this problem requires accessing the router's web interface settings. In this article, we'll look at how to bypass the blocking. MAC address, increase the DHCP addressing pool, and disable hidden firmware limits. You'll learn how to manage access to your network without purchasing new equipment.
The process of restoring access to wireless network This may vary depending on the device model. However, the basic principles of network protocol operation remain the same for most home devices. The key is to proceed consistently and understand which parameters you are changing.
Troubleshooting: Why Your Router Isn't Allowing New Devices
Before resorting to drastic measures, it's important to understand the nature of the limitation. Most often, the problem lies in the settings. DHCP serversThis component is responsible for automatically assigning IP addresses to all devices connected to the network. If the address pool is limited, for example, to the range 192.168.1.100 to 192.168.1.105, then a sixth device will no longer be able to obtain an address automatically.
The second common reason is that filtering is enabled. MAC addressesThe router owner or administrator may have accidentally activated the "Whitelist" mode, which simply didn't include the details of new devices. In this case, the router sees the device but deliberately blocks its connection at the driver level.
It's also worth considering the physical limitations of the hardware. Budget models may have limited RAM, which limits the ability to hold more than 10-15 active clients in the ARP table. In this case, older entries displace new ones, creating a "dead zone" for connections.
⚠️ Important: Before changing settings, make sure you are connected to the router via a LAN cable. If the network reboots or the gateway IP address changes during the setup process, the wireless connection may be lost and you will lose access to the interface.
Interfaces from different manufacturers vary greatly. What's on TP-Link It's called "Wireless MAC Filtering" Asus may be hidden in the "Network Map" section. Be careful with the terminology for your model.
Login to the control panel and basic network settings
To make changes, you'll need access to the admin panel. The standard method is to enter the gateway IP address into the browser's address bar. This is most often 192.168.0.1 or 192.168.1.1If these addresses don't work, check the sticker on the bottom of your device—it always contains the latest login information.
After entering your login and password (often admin/admin), the main screen will open. You need to find the section related to the local network. It may be called LAN, "Local Area Network" or "Network." This is where the key addressing parameters are located.
In some models, for example, from Keenetic or MikrotikThe settings are scattered across different tabs. Use the settings search if you can't find the item you need manually. The key element here is the DHCP server status.
What to do if you forgot your router password?
If the default combination doesn't work, and you've changed it and forgotten it, a hard reset will help. Find the recessed button on the router's case and press it with a paperclip for 10-15 seconds while the power is on. The router will return to factory settings, but all your personal data will be deleted.
Keep in mind that after changing the IP address of the router itself, you will have to reconnect to it using the new gateway address.
Expanding the DHCP range and removing the address limit
The most effective way to remove the limit on the number of connected devices is to expand the range of assigned addresses. Find the menu item DHCP ServerThere you will see the fields "Start IP Address" and "End IP Address".
By default, many routers offer a narrow range, such as 100 to 150. That's only 50 devices. You can change the final address to 254, which theoretically allows you to connect up to 150 gadgets simultaneously. This is more than enough for any smart home.
Also pay attention to the "Lease Time" parameter. If it's set to several days, addresses are released very slowly. Reducing this value to 120 minutes (2 hours) will allow IP addresses to be released more quickly from devices that have temporarily left the coverage area.
☑️ Setting up a DHCP server
After applying the settings, the router may require a reboot. During this time, all connected devices may briefly lose internet connection.
It's important to understand that increasing the address pool doesn't increase the channel's throughput. If you have a 50 Mbps plan, connecting 50 devices will result in extremely low speeds for each, even if they all technically connect.
Managing MAC address filtering (Whitelist/Blacklist)
Connection restrictions are often enforced by MAC address filtering. This security feature allows access only to trusted devices. Check the section Wireless MAC Filtering or "MAC Address Filter" in Wi-Fi settings.
If the filter is enabled in "Allow" mode, the MAC addresses of all your devices should be listed. To remove the restriction, the easiest way is to completely disable this feature by switching the status to Disable or "Off".
If you want to keep protection but add a new device, you need to find its MAC address. On Android, this can be done in the "About phone" section or in the Wi-Fi network properties. On Windows, the command ipconfig /all in the command line will show the physical address of the adapter.
⚠️ Warning: MAC addresses can be spoofed (cloned). If you see a device in the client list with the name "Unknown" or a strange set of characters that you don't recognize, someone may be cloning your trusted device's address to bypass security.
Some firmware versions have an "Add Current Device" feature. This is the fastest way to whitelist a new device without manually rewriting the addresses.
Hidden ISP Restrictions and Internet Sharing
A separate category of problems arises when using mobile routers or mobile operator plans. Providers often artificially limit the number of connected devices or the operating system type to prevent tethering. They analyze TTL (Time To Live) packages.
To bypass this limitation on routers TP-Link or KeeneticIf you're using a USB modem, you can try changing the TTL value on the router itself. Typically, the default value for Windows is 128, and for Android/Linux, it's 64. The ISP will detect the TTL jump and block the connection.
Changing this parameter requires access to hidden settings or the use of special scripts if the router supports OpenWrt. However, on many modern models, this function is built into the interface under the "Mobile Internet" or "3G/4G" section.
Please note that bypassing provider restrictions may be against the terms of your tariff plan. Before making any changes, check your contract or your operator account, as the rules may change.
If your ISP blocks your connection because multiple devices are present, no amount of DHCP pool expansion will help. More complex traffic masking methods are required, which are not available on all consumer routers.
Comparison of the capabilities of popular router models
Different manufacturers implement restrictions differently. The table below compares typical restrictions and how to circumvent them across popular brands.
| Router brand | Typical client limit | Where to find the settings | Features of lifting the limit |
|---|---|---|---|
| TP-Link | Depends on the model (10-32) | Wireless → Wireless MAC Filtering | Often requires manual disabling of filtering |
| ASUS | Up to 50-100 | Wireless → MAC Address Filter | Convenient whitelist management interface |
| Keenetic | Up to 50 (flexible) | My Networks and Wi-Fi → Access | Detailed configuration of access profiles |
| Tenda | 10-15 (budget) | Wireless Settings → MAC Filter | Small memory size, difficult to handle many clients |
As you can see from the table, the interface may differ, but the logic remains the same: look for sections related to wireless access and filtering. In budget models Tenda or D-Link Older series can physically "choke" with more than 10 connections due to a weak processor.
If your router is budget-friendly, don't expect it to work reliably with 30+ devices. In this case, software-based restrictions removal won't have the desired effect—the network will simply become unstable.
This is especially relevant for providers who link tariffs to specific network equipment.
Frequently Asked Questions (FAQ)
Is it possible to remove the limit on the number of devices on a mobile operator's plan?
Officially, no, unless your plan prohibits it. Technically, you can try changing the TTL on the receiving device or use special apps for data sharing, but the carrier may block the SIM card for violating the terms of the contract.
Why does the router say "Limited" even though there are only a few devices?
This could be an IP address conflict, where two devices are attempting to use the same address, or a DHCP server failure. Try rebooting the router or statically assigning an IP address to the affected device.
Does lifting restrictions affect internet speed?
Removing software limits in itself does not increase the link speed. However, if the limit was caused by an ARP table overflow, removing it will restore normal network operation. But remember: the more devices there are, the less bandwidth each one gets.
Is it safe to disable MAC address filtering?
For a home network with a strong WPA2/WPA3 password, this is acceptable. MAC filtering is weak security and easily bypassed. The primary defense is a strong Wi-Fi password. If the password is strong, disabling the MAC filter isn't critical.