Modern routers are equipped with numerous ports, indicators, and buttons, the purpose of which often remains a mystery to the average user. One such button is WPS, which is usually located on the back or bottom of the device near the power port or reset button. Many router owners accidentally press it, noticing the blinking lights, but have no idea what function it performs or why it's needed.
The abbreviation WPS comes from English Wi-Fi Protected Setup, which translates to "Wireless Protected Connection Setup." This technology was developed by the Wi-Fi Alliance to simplify the process of connecting devices to a wireless network, eliminating the need for users to manually enter complex passwords. In an ideal scenario, a single tap is enough for the device to automatically access the internet.
In this article, we will examine in detail the operating principle of this technology, consider a step-by-step algorithm for connecting various devices, and pay special attention to cybersecurity issues, since the use of WPS carries certain risks that every owner should be aware of. Wi-Fi router.
How WPS technology works
The basic idea behind this technology is to automatically transfer network settings from the router to the connecting device. When you activate the WPS function, the router and client device (smartphone, laptop, printer) exchange encrypted data, including the network name (SSID) and password. This process occurs without user intervention, making it especially convenient for devices without a full keyboard or screen.
There are two main methods for implementing this technology. The first is using the physical button on the router body, which is what we're talking about. The second method is entering a special eight-digit PIN code generated by the router. The presence of the PIN code is what key vulnerability, since it can theoretically be brute-forced, giving an attacker access to your network.
Data exchange occurs via EAP (Extensible Authentication Protocol). Devices communicate with each other until they confirm their legitimacy. It's important to understand that for a successful connection, both devices must support the WPS standard, although modern devices often have this support built in by default.
⚠️ Important: If you don't use the Quick Connect feature, we recommend disabling WPS in your router settings. This will close a potential loophole for hackers trying to access your home network through a PIN code vulnerability.
How to connect devices using the WPS button
Using a physical button is the easiest and fastest way to connect. You don't need to search for a password sticker, enter case-sensitive characters, or check your keyboard layout. Simply press the button on the router and activate the network search on your device.
Let's look at the steps for connecting a smartphone or tablet. First, make sure Wi-Fi is enabled on your device. Then, go to your wireless network settings. You may see an option to "Connect via WPS" or something similar in the list of available connections. If you don't see this option, press the WPS button on your router (hold it for 1-3 seconds) and immediately start scanning for networks on your phone. The device will automatically detect the enabled mode and connect.
The procedure for connecting printers and other peripherals may differ slightly. Many MFP models have a dedicated WPS button or a menu in the print settings. Pressing it puts the printer into standby mode. Then, within two minutes, press the button on the router. The lights on both devices should stop flashing and turn solid, indicating a successful connection.
☑️ Check before connection
Router indication and behavior when WPS is activated
Understanding how your router behaves will help you avoid mistakes and unnecessary worries. Indicator behavior may vary depending on the manufacturer (TP-Link, ASUS, D-Link, Zyxel), but the general principles remain similar.
There's usually a dedicated LED on the front panel labeled WPS or Wi-Fi. When idle, it may be off or steady if the feature is enabled in the software. When the button is pressed, the LED begins to flash rapidly, indicating that the device is searching for devices and the handshake is in progress.
If the connection is successful, the indicator stops flashing and turns solid (sometimes it changes color). If the indicator flashes for a long time (more than 2-3 minutes) and then goes out or turns red, this indicates an error. This could be due to a timeout, device incompatibility, or the feature being blocked by security settings.
| Indicator status | Meaning | User action |
|---|---|---|
| It burns with a steady light | The function is enabled, the network is active | You can connect devices |
| Flashing quickly | The connection process is in progress | Wait for completion (up to 2 minutes) |
| Flashing slowly | Waiting for a button to be pressed on the device | Press WPS on the client |
| It doesn't burn. | The function is disabled | Enable in settings or press the button |
Configuration and management via web interface
A physical button isn't the only control method. Users often prefer to configure network settings through a browser. To do this, you need to enter the router's IP address (usually 192.168.0.1 or 192.168.1.1) in the address bar and log in.
In the settings menu, this section may have different names: "Wireless Mode," "Wi-Fi Network," or "WPS." Here you can view the current status of the feature, change the PIN (if available), or disable the protocol completely. Some advanced models allow you to set a WPS schedule, for example, activating it only for 5 minutes per day.
What should I do if there are no WPS settings in the menu?
Some providers or custom firmware may hide this option. Try updating your router firmware to the latest version or performing a factory reset. If this doesn't help, your model may not support software control of this feature.
The web interface also often displays a list of devices attempting to connect or already using WPS. This is a useful diagnostic feature: if you see an unknown device when you press the button, it means someone is trying to access your network.
Safety issues and risks of use
Despite its convenience, WPS technology has serious vulnerabilities that were identified by security researchers several years ago. The main problem lies in the PIN authentication method. The code consists of 8 digits, but verification occurs in two stages: first, the first 4 digits are checked, then the second 4. This dramatically reduces the number of possible combinations.
An attacker within range of your network can use special utilities (for example, Reaver or Bully) to automatically brute-force the PIN code. The process takes anywhere from a few minutes to several hours. Once the code is obtained, the hacker gains access to the Wi-Fi password and full access to the local network, allowing them to intercept traffic or attack connected computers.
⚠️ Warning: Even if you only use the button and never enter a PIN, the vulnerability remains, as the PIN verification protocol itself is active at the router firmware level. The only reliable protection is to completely disable WPS.
Additionally, there are Denial of Service (DoS) attacks, where the router is flooded with WPS connection requests, causing it to freeze or reboot. In this case, internet access is lost for all network users.
Compatibility of devices and operating systems
Not all devices work equally well with WPS. Support for this technology has changed with the release of new operating system versions. For example, in earlier versions Android (before version 9 Pie) the WPS function was built into the standard Wi-Fi menu.
Starting with Android 9.0, Google removed WPS support from the security system. This means you won't find a "Connect via WPS" button in the default settings on modern smartphones. Manufacturers sometimes reintroduce this feature into their custom skins, but this is rare.
In the operating system Windows WPS support remains. In Windows 10 and 11, when attempting to connect to a network, you may see the message "Connect using the WPS button." However, for this to work, the wireless adapter drivers must correctly support this feature, which is not always the case.
- 📱 Android: There is no native support for versions 9.0 and higher; third-party apps or the use of QR codes are required.
- 💻 Windows: There is support, but it depends on the Wi-Fi adapter drivers and OS version.
- 🍎 macOS / iOS: Apple has never supported WPS in its devices, preferring its own security protocols.
- 🖨️ Printers/TV: Most modern technology (Smart TV, MFP) still supports WPS perfectly for quick setup.
WPS Alternatives: QR Codes and Guest Networks
Due to the declining popularity and security risks of WPS, router manufacturers and OS developers are offering more modern and secure connection methods. QR codes are becoming the most popular standard today.
Many routers (for example, MikroTik, Keenetic, TP-Link (with new firmware) generate a unique QR code for the guest or main network. This code can be found on a sticker on the bottom of the device or generated in the web interface. Guests simply point their smartphone's camera at the code, and the phone will prompt them to connect to the network without requiring a password.
Another great option is creating a guest network. You can set up a separate SSID with a simple password that's easy to dictate, or one with a limited time. This isolates guests from your personal files and smart home devices, providing an additional layer of security.
Is it possible to create a QR code yourself?
Yes, if your router can't generate them. There are free online Wi-Fi QR code generators. You enter the network name and password, and the site creates an image that you can save and share with guests.
Frequently Asked Questions (FAQ)
What happens if you hold the WPS button for a long time?
A short press (1-3 seconds) activates connection mode. However, holding the button for 5-10 seconds or more on many router models will reset the router to factory settings. Be careful not to lose your internet settings.
Is it possible to connect to WPS from an iPhone?
No, Apple devices (iPhone, iPad, MacBook) do not support the WPS protocol. To connect, you will need to enter the password manually or use a QR code if your router supports displaying one.
Why doesn't the WPS button work even though I press it?
The feature may be disabled in your router settings. It could also be caused by a timeout (usually 2 minutes) or incompatibility with the connected device. Check if your ISP has blocked this feature.
Do I need to change my Wi-Fi password after using WPS?
No, the password remains the same. WPS simply transmits it to the device automatically. However, if you suspect someone has exploited a PIN vulnerability, you should change the password and disable WPS.