Many users are familiar with the situation when a device suddenly states that authentication is required when connecting to Wi-Fi, but the internet fails. The smartphone or tablet screen may remain stuck indefinitely at the "Obtaining IP Address" stage or display an authentication error message. This means the router and your device are unable to negotiate a secure connection, blocking access to the network.
There can be many reasons for this behavior, ranging from a simple router software glitch to a change in encryption type or a MAC address table overflow. Often, the problem stems from incorrectly stored data on the client device itself, which is attempting to use an old password or an incorrect security protocol. In this article, we'll discuss how to diagnose the source of the problem and restore a stable connection.
First, assess the scale of the problem: is the internet outage limited to just one device, or does it affect all devices in the home? If the outage is widespread, you'll need to look for the cause in your router settings or with your ISP. If the issue is local, it may be enough to perform a few steps directly on the smartphone or laptop that's unable to connect.
Restarting the hardware and resetting the network cache
The simplest and most often overlooked solution is a complete reboot of all components involved. Routers, like any computer, have RAM, which over time becomes filled with temporary files and errors. Clearing the network cache and restarting the equipment allows you to clear these buffers and restart the handshake procedure between the devices.
Don't just turn off the power button. There's a proper reboot algorithm for your router: unplug the power, wait at least 30 seconds for the capacitors to fully discharge, and only then plug the device back in. This ensures that any residual charge is cleared and all services are fully restarted.
On the client side (smartphone or laptop), you also need to reset your network settings. This will delete all saved Wi-Fi networks, Bluetooth settings, and VPN profiles, returning the network stack to its original state. On Android, this can be found in the Network Settings section. Settings → System → Reset settings → Reset network settings, and on iOS the path lies through General → Transfer or reset iPhone → Reset → Reset network settings.
☑️ Hard Reset Algorithm
Checking the password and deleting the network profile
A common cause of the "Authorization required" message is password desynchronization. If you recently changed the access key in the router settings but the old profile is still saved on your phone, the device will attempt to log in with incorrect credentials. In response, the router will reject the connection, which the operating system interprets as an authentication error.
To eliminate this factor, you need to forcefully delete the network profile. Go to the list of available Wi-Fi networks, tap the desired access point, and select the option Forget the network or DeleteAfter this, re-enter the password, carefully checking the letter case and the absence of extra characters.
⚠️ Important: If you use a complex password with special characters, make sure that your keyboard layout is not activated and changes characters (for example, replacing letters with numbers or special characters depending on the input language).
It's also worth paying attention to the security type. Modern routers support the following standards: WPA2 And WPA3If your device is quite old, it may not support the new encryption protocol. WPA3, which will interrupt the authorization process. In this case, you should try setting up mixed mode in your router settings. WPA2/WPA3 or temporarily switch to clean WPA2-Personal.
Why might my password not be accepted?
Sometimes the problem isn't with the password itself, but with hidden characters. Copying a password from the clipboard can cause invisible spaces to be added at the beginning or end of the line. Always enter the key manually if automatic connection doesn't work.
Date and time settings on your device
Few people realize that an incorrect date and time can block Wi-Fi access. Security protocols like WPA2-Enterprise or even standard home networks with time-based filtering require clock synchronization. If your device displays a different date than the actual date (for example, 2015), security certificates will be invalidated.
The certificate verification process (SSL/TLS handshake) is strictly dependent on timestamps. If the time difference is significant, the router or provider's gateway will reject the connection request, returning an authorization error. This is especially true for public networks and corporate Wi-Fi, but can also occur at home when parental controls are in use.
To fix this, go to your date and time settings. Make sure the option is enabled. Auto-tuning or Use network timeIf automatic setup doesn't work, manually set the current date and time down to the minute. After adjusting the time, try connecting again.
IP address conflicts and DHCP settings
One technical reason for authorization failure is an IP address conflict. If two devices on your network attempt to use the same static IP address, or if the router's DHCP address pool is exhausted, the new device will be unable to obtain the necessary network parameters. Without an IP address, full authorization and internet access are impossible.
You can check the current status by viewing the connection details. If you see values like this in the IP address field 169.254.x.x, this means the device was unable to obtain an address from the router (APIPA). In this case, you need to check the DHCP server settings in the router interface. It is usually located at 192.168.0.1 or 192.168.1.1.
The table below shows the parameters that you should check in the LAN/DHCP section of your router settings:
| Parameter | Recommended value | Description |
|---|---|---|
| DHCP Server | Enable | The server should distribute addresses automatically. |
| Start IP Address | 192.168.1.2 | Pool starting address (second after gateway) |
| End IP Address | 192.168.1.254 | Pool end address (maximum clients) |
| Lease Time | 120 minutes | Address lease time before renewal |
If DHCP is enabled but the issue persists, try manually setting a static IP address on the client device. In the Wi-Fi network settings, select "Advanced" → "IP Settings" → "Static." Enter an address that matches the router's subnet (e.g. 192.168.1.50), gateway (router address) and DNS (you can use public DNS from Google: 8.8.8.8).
MAC address filtering and access restriction
Router owners often use MAC address filtering to enhance security. This mechanism allows only a specific list of devices to access Wi-Fi. If you buy a new phone or update a device, its MAC address isn't on the router's whitelist, and the connection will be blocked with an authorization error.
To check this, you need to log into the router's web interface. Find a section that may be called Wireless MAC Filtering, Access control or Client filterIf the feature is enabled, you need to find your device's MAC address (found on the sticker on the device or in the About Phone / Status settings) and add it to the list of allowed addresses.
An alternative is to temporarily disable filtering to see if the problem goes away. However, for ongoing security, it's best to configure the access list correctly. Some providers also use MAC address binding on their end. In this case, if you change your router or network card, you should call technical support or use the MAC address cloning feature in the router settings.
Bandwidth and channel issues
Modern routers operate in two ranges: 2.4 GHz And 5 GHzSometimes devices incorrectly switch between them or attempt to connect to the 5 GHz band using settings intended for 2.4 GHz, causing authorization failures. This is especially common with older devices that do not physically support 5 GHz.
It is recommended to separate networks in the router settings by giving them different names (SSID), for example, HomeWiFi And HomeWiFi_5GThis will allow you to force older devices to connect to the more compatible 2.4 GHz band. It's also worth checking channel congestion. If neighboring routers are using the same channel, packet collisions may occur, preventing the handshake from completing.
Use Wi-Fi analyzer apps (eg. WiFi Analyzer) to find a free channel. In the router settings, change the channel value from Auto to a fixed number (1, 6, or 11 for the 2.4 GHz band). Channel width also affects stability: for 2.4 GHz, it's better to set 20 MHz, because 40 MHz in apartment buildings often leads to interference.
⚠️ Note: Router interfaces from different manufacturers (Keenetic, TP-Link, Asus, MikroTik) may differ. Look for sections with similar names, but remember that the exact location of settings depends on the firmware version.
Resetting the router to factory settings
If none of the software methods help, it's possible that the router's configuration has accumulated critical errors or the firmware files are corrupted. In this case, a hard reset is a radical but effective solution.Hard Reset). This will return the device to its out-of-the-box state.
To perform a reset, find a small hole with the inscription on the router body Reset or RestorePress it with a thin object (like a paperclip) and hold the button for about 10-15 seconds until the indicators flash simultaneously. After this, the router will reboot.
Important: After the reset, you'll need to reconfigure your internet connection (enter your provider's login and password) and configure new Wi-Fi network settings. Make sure you have your contract with your provider handy.After the reset, try connecting the device from scratch. If the authorization error disappears, the issue was a software glitch in the router. In the future, try updating your router firmware periodically through the manufacturer's official website to receive security and stability fixes.
What should I do if my router doesn't provide internet access after a reset?
Check your ISP's cable (the WAN/Internet indicator should be lit). Go to your router settings and make sure the correct connection type (PPPoE, L2TP, Dynamic IP) is selected for your ISP.
Frequently Asked Questions (FAQ)
Why does it say "Authorization required" on Android, even though the password is correct?
This could be due to an IP address conflict, MAC address filtering enabled on the router, or encryption protocol incompatibility (for example, the device doesn't support WPA3). Try forgetting the network and rebooting the router.
How to bypass authorization on public Wi-Fi networks?
Typically, after connecting to an open network, the Captive Portal should open. If this doesn't happen, try opening any HTTP site (e.g., neverssl.com) or turn off mobile internet to force the phone to use Wi-Fi for the request.
Can antivirus software block Wi-Fi connections?
Yes, some firewall features in antivirus or VPN applications can block the DHCP or DNS process, causing authorization errors. Try temporarily disabling your firewall or VPN.
What does the "Obtaining IP Address" error mean?
This means the device has found the router, but the router can't assign it an address. Check if the DHCP server is enabled on the router and that the list of connected clients isn't full.