The problem of sudden slowdowns in wireless network performance is often rooted not in a weak signal, but in software limits set at the router level. When a device sends too many data packets in a short period of time, the built-in protection mechanism may interpret this as an attack or simply overload and begin artificially slowing down the connection. This process is often referred to as "slowing down." limiting requests, and it causes a lot of problems for users trying to run torrents, online games, or high-quality streaming.
Understanding how this mechanism works is essential for anyone who wants to achieve maximum performance from their equipment. In most cases, routers are configured to operate conservatively by default to ensure stability, but at the expense of response time to heavy traffic. Removing these restrictions requires access to the administrative panel and caution, as incorrect settings can lead to a complete network shutdown.
In this article, we'll cover various scenarios, from standard router settings for popular brands to more complex traffic management methods. You'll learn which parameters control the number of simultaneous connections and how to properly modify them to ensure yours Wi-Fi worked at the limits of your tariff plan.
Reasons for router restrictions
There are several fundamental reasons why a hardware manufacturer or ISP might implement request rate limiting mechanisms. Primarily, it's to protect against DDoS attacks and network storms, when a single device starts generating spam traffic, consuming the router's CPU to 100%. If you don't implement limit, the router may simply freeze, requiring a reboot.
The second reason is often the technical limitations of the hardware itself. Budget router models have limited RAM and a weak processor, which are physically incapable of handling thousands of simultaneous connections (NAT table size). When the NAT table becomes full, new requests are either dropped or queued, which the user perceives as lag.
⚠️ Attention: Completely disabling all restrictions on weaker equipment can lead to unstable operation and constant connection drops. Make sure your router has sufficient power.
You should also consider the policies of your internet service providers. Some telecom operators use technologies DPI (Deep Packet Inspection) or limit the number of concurrent sessions on their equipment, and no router settings will help. In this case, you should contact your service provider's technical support.
Access to security and traffic settings
To make changes to your network configuration, you'll need to log into your router's web interface. This is a standard procedure, performed through a browser on any device connected to the network. The login address is usually found on a sticker on the bottom of the device and most often looks like this: 192.168.0.1 or 192.168.1.1.
After entering your login and password, the control panel will open. Interfaces vary by manufacturer. Asus, TP-Link, Keenetic, Mikrotik — may differ visually, but the logic behind the sections' arrangement is similar. We need sections related to WAN, Firewall (Firewall) or NAT.
These sections contain parameters that regulate throughput and the number of processed packets. Here you can find options like "Flood Protection" or "Connection Limit," which are responsible for artificially throttling traffic under high load.
Configuring NAT and Firewall to remove blockages
The most effective way to address these restrictions is by fine-tuning the NAT table and firewall rules. By default, many routers have aggressive protection enabled, blocking incoming connections not initiated from the internal network. To support game servers, video calls, and P2P networks, these rules need to be relaxed.
In the section Security or Firewall find the option SPI Firewall (Stateful Packet Inspection). In some cases, disabling it completely can solve the issue of blocked requests, although this reduces the security level. A more prudent approach would be to add exception rules for specific devices or ports.
Also an important parameter is NAT TimeoutThis is the amount of time the router keeps a record of a closed connection. If the timeout is too long, the NAT table quickly becomes overflowing with "dead" entries, and new requests are blocked. Reducing this value (for example, to 120 seconds for TCP) can significantly improve performance.
| Parameter | Recommended value | Impact on the network |
|---|---|---|
| NAT Timeout (TCP) | 120 - 300 sec | Frees the connection table |
| NAT Timeout (UDP) | 60 - 120 sec | Speeds up table updates for games |
| Max Connections | To the maximum (or 8192+) | Removes the limit on the number of threads |
| SPI Protection | Off (if safe) | Removes packet checking |
☑️ Checking NAT settings
Optimizing wireless mode and channel
While this question concerns software-based request limits, the physical layer of data transmission can't be ignored. If the airwaves are clogged with neighboring routers, your requests will be lost, and the system will attempt to resend them, creating the illusion of speed limitation. Switching to a free channel can work wonders.
Use channel width 40 MHz or 80 MHz in the 5 GHz band for maximum throughput. In the 2.4 GHz band, it's best to leave 20 MHzto avoid interference, but select channel 1, 6 or 11 manually, avoiding the automatic mode, which often selects a suboptimal option.
It is also worth disabling old, slow communication standards, such as 802.11b/g, if there are no old devices on the network. Forced activation of the mode 802.11n or 802.11ac/ax will force the router to use more efficient encryption and transmission algorithms, which indirectly reduces overhead and the number of service requests.
⚠️ Attention: When switching Wi-Fi standards, all your devices must support the selected protocol. Otherwise, they simply won't be able to connect to the network.
Using alternative firmware
If your router's default functionality doesn't allow for flexible restriction management, your only option is to install an alternative operating system. Firmware like OpenWrt, DD-WRT or Padavan give complete control over the Linux network stack that most routers run on.
In such systems, you can manually edit kernel parameters, increase the size of the conntrack table (which stores active connections), and configure complex QoS (Quality of Service) rules. This turns a regular home router into a professional network device.
However, this method requires a high level of skill. Incorrect firmware can brick the device, making it impossible to repair using software. Always check model compatibility and strictly follow the instructions for your specific hardware version.
Risks of reflashing
Installing third-party software voids the manufacturer's official warranty. Furthermore, there's a risk of damaging hardware modules (such as signal amplifiers) if the drivers are incorrectly selected.
FAQ: Frequently Asked Questions
Why did the router start to heat up after the restrictions were lifted?
Removing software limits forces the processor to operate at its full capacity, processing more data streams without queues. This leads to increased heat generation. It is recommended to provide additional ventilation for the device.
Does the provider influence the number of requests?
Yes, many providers limit the number of simultaneous connections (sessions) on their equipment. If your router is configured perfectly, but the limit is set by your provider, the only way to change it is by upgrading your plan or contacting support.
Is it safe to disable SPI Firewall?
For a home network with one or two computers, the risk is minimal if the computers themselves have antivirus software and firewalls installed. However, on public networks or when connecting multiple IoT devices, this could expose security holes.
How to check the current number of connections?
Advanced routers (such as Keenetic or Asus with Merlin firmware) feature graphs of active connections. In OpenWrt, this information can be accessed using the command cat /proc/sys/net/netfilter/nf_conntrack_count.