Many users are familiar with the situation where a device is connected to a wireless network, the lights are on, but browser pages won't load. Often, a network system analyzer displays a frightening status: DNS server is not responding, which blocks access to internet resources. This means your computer or smartphone cannot translate a website's human-readable domain name into the digital IP address needed to route traffic.
The causes of this equipment behavior can range from a simple ISP equipment failure to incorrect network card settings or an outdated DNS cache. In most cases, the problem can be resolved independently, without calling a technician, by consistently checking the TCP/IP protocol settings and the router's status. It's important to understand that this error doesn't always indicate a malfunction. router or a cable break.
Further steps depend on the specific device causing the addressing conflict—a Windows desktop PC, a mobile device, or the access point configuration itself. We'll cover a comprehensive diagnostic approach that will restore network functionality as quickly as possible. Start by checking the basic connection parameters.
Initial diagnostics and equipment reboot
The first and most effective step when a network anomaly occurs is a complete reboot of all links in the chain. Many users ignore this step, relying on software resets, but hardware reset Frequently clears temporary buffers and eliminates communication module freezes. Unplug the router, wait 15-20 seconds, and then plug it back in again until the system has fully booted.
At the same time, you need to reboot the client device - laptop, smartphone, or tablet. In operating systems of the family Windows or macOS Errors may have accumulated in the TCP/IP stack, preventing the correct address request. After turning on the device, try opening any website you've previously visited to check the connection.
⚠️ Important: If the WAN/Internet indicator doesn't light up or is blinking red after rebooting the router, the issue may be with your ISP. In this case, checking your computer's DNS settings will be useless.
Don't forget about the possibility of a temporary outage from your provider. Maintenance or failures on backbone communication channels can result in domain name servers becoming unavailable. If rebooting doesn't help, it's worth contacting your provider's technical support or checking the service status in your personal account.
Clear DNS Cache and Renew IP Address in Windows
One of the most common reasons why DNS server is not responding, is an overflow or corruption of the local name resolution cache in the operating system. Windows maintains a table of IP address and domain mappings to speed up operation, but over time, incorrect entries can accumulate. To clear this cache, you must use the command prompt with administrator privileges.
Open the Start menu and type in the search cmd, right-click on "Command Prompt" and select "Run as administrator." In the window that opens, enter the command ipconfig /flushdns and press Enter. This will force a clear of the DNS client cache, which often resolves the issue of websites being unavailable while the internet is working.
Next, you should renew the IP addressing, as the current lease may have expired or been issued with errors. To do this, enter the following two commands in the same command line: ipconfig /release to reset the current address and ipconfig /renew to obtain a new one from the router's DHCP server. After performing these steps, the network may be temporarily interrupted.
☑️ Windows Network Settings Reset Algorithm
If the standard commands don't work, you can try a deeper reboot of the network components. Enter in the command line netsh winsock reset And netsh int ip resetThese commands reset the Winsock directory and IP protocol settings to factory defaults, eliminating the effects of malware or faulty driver updates.
Setting up static DNS addresses for Google and Cloudflare
Often, the problem stems from unstable DNS servers automatically assigned by your provider. They may be overloaded or have software errors. The optimal solution is to manually register the addresses of public and fast servers, such as Google Public DNS or Cloudflare, which are characterized by high fault tolerance.
To change settings in Windows 10 or 11, go to Settings (the gear icon in the Start menu), then select Network & Internet. Depending on your connection type, click Change adapter settings or Hardware properties. Find your WiFi connection, right-click it, and select Properties. In the list of components, find the line Internet Protocol version 4 (TCP/IPv4), select it and click the "Properties" button.
In the window that opens, switch the mode to "Use the following DNS server addresses." Enter the relevant numeric values in the input fields. For Google, this is 8.8.8.8 (main) and 8.8.4.4 (alternative). For Cloudflare, addresses are used 1.1.1.1 And 1.0.0.1Once you save the settings, the changes take effect immediately.
⚠️ Important: When manually configuring DNS, ensure you haven't accidentally changed the computer's IP address or default gateway. These fields should be left set to automatic unless you are an experienced network administrator.
On mobile devices running Android or iOS The procedure is similar. Go to the WiFi settings, tap the information icon next to your network (or long-press the network name), and find the IP settings section. Switch the DHCP mode to "Static" or "Manual" and enter the addresses specified above into the same DNS 1 and DNS 2 fields.
Checking network card and WiFi adapter drivers
Outdated, corrupted, or malfunctioning network adapter software is a common cause of connection errors. The driver acts as an intermediary between the operating system and the physical hardware, and any failure in its code can lead to DNS server is not respondingThis problem is especially relevant after major Windows updates or installing a new antivirus.
To diagnose the problem, open Device Manager. This can be done by right-clicking the Start button and selecting the appropriate item from the menu. Expand the Network Adapters branch. Find your WiFi module in the list (usually the name contains the words Wireless, WiFi, 802.11, or a brand name like Realtek, Intel, Qualcomm). If a yellow exclamation mark is visible next to the device, the driver is not working correctly.
Try rolling back or reinstalling the driver. Right-click the adapter, select "Uninstall device," confirm, and restart your computer. When you restart, the system will attempt to automatically install the default driver. If this doesn't help, download the latest software from the official website of your laptop or motherboard manufacturer.
| Type of problem | Symptom in the dispatcher | Recommended action |
|---|---|---|
| No driver | Unknown device | Install software from a disk or website |
| Version conflict | Yellow triangle | Remove device and update configuration |
| Software blocking | The device is disabled | Turn on the device via the context menu |
| Hardware failure | Device not found | Check the antenna connection or replace the adapter. |
Antivirus programs and firewalls
Third party security solutions such as Kaspersky, Avast, ESET or the built-in Windows firewall, can filter network traffic excessively aggressively. Sometimes, after updating signature databases or the program itself, the protection mechanism begins blocking legitimate DNS requests, considering them suspicious.
To test this hypothesis, temporarily disable your antivirus and firewall. This is usually done through the system tray icon (near the clock) or the main program window. If the internet works after disabling protection, the problem lies with the filtering settings. You'll need to find the network or web traffic protection section in your antivirus settings and reset its settings.
It is also worth checking if the file has been modified. hosts malware. This system file takes precedence over DNS servers and can redirect queries to nowhere. Open the file C:\Windows\System32\drivers\etc\hosts Using Notepad (as administrator). It shouldn't contain any lines with IP addresses or domain names, except for those that are commented out (starting with #).
Why does antivirus block DNS?
Modern antiviruses use DNS checking technology to protect against phishing. They check every request against a database of known malicious sites. If the checking server is unavailable or the database is corrupted, all DNS traffic can be blocked for security reasons.
Router Settings: DHCP and MAC Address Filtering
If the "DNS server not responding" error occurs on all devices in your home, the source of the problem is most likely the router itself. You need to log into the administrator's web interface (usually at 192.168.0.1 or 192.168.1.1) and check your local network settings. Make sure that the function DHCP servers It is active because it is the one that distributes addresses to clients.
In the WAN (Internet) section, check whether DNS is set to obtain automatically or whether specific addresses are specified. It is also recommended to specify static DNS from Google or Yandex in the router settings (77.88.8.8), so that the router itself uses reliable servers for its own needs and broadcasts them to clients.
Another possible cause is MAC address filtering. If your computer or phone isn't whitelisted, the router may connect to the WiFi but not allow network access. Check the "Wireless Security" or "MAC Address Filtering" section to ensure your device isn't blocked.
⚠️ Attention: Interfaces of routers from different manufacturers (TP-Link, ASUS, Keenetic, MikroTik) vary greatly. Menu item names may vary, so look for sections related to LAN, DHCP, or Internet Settings.
Specifics of Android and iOS mobile devices
On smartphones and tablets, the situation may be aggravated by the peculiarities of the mobile operating system. Android Starting with version 9, a "Private DNS" feature was introduced, which encrypts DNS requests. If the server specified there is unavailable, the internet will not work. Check this in the settings: "Connections" → "Other connection settings" → "Private DNS." It's best to select "Auto" or "Disabled" for testing.
IN iOS (iPhone, iPad) It's worth paying attention to the date and time. Incorrectly set time can cause security certificate errors, which users mistake for DNS issues. Alternatively, in the WiFi settings on iOS, you can manually enter the DNS by tapping the blue information icon next to the network and scrolling down to the DNS section.
On mobile devices, the "Reset Network Settings" feature often helps. This will delete all saved WiFi passwords, Bluetooth, and VPN settings, but will return network settings to their factory defaults, which often resolves software conflicts.
Why does the error only occur in the browser, while other applications work?
This indicates a problem with the cache of a specific browser or extensions installed in it. Try opening the website in incognito mode. If everything works, clear the browser cache or disable extensions, especially those related to security or IP address changes (VPN, proxy).
Can a virus cause a DNS server error?
Yes, there are Trojans that change your system's DNS settings to those of malicious servers (DNS hijacking). If you see ads where they shouldn't be or are redirected to strange websites, be sure to run a full antivirus scan and reset your network settings.
Does using a VPN affect this error?
Absolutely. If the VPN connection was broken incorrectly, the system may continue to attempt to send DNS requests through a non-existent tunnel. Disable the VPN completely, check your system's proxy settings, and try reconnecting.
What to do if nothing helps?
If all the above methods fail, the problem may be hardware-related (a faulty network card or router) or related to a major change at your ISP. In this case, the most practical step would be to reset the router to factory settings (press the Reset button) and reconfigure it, or contact your ISP's technical support.