Whenever your network administrator, educational facility, đăng nhập jun 88 or state enforces web filtering it's often because of DNS-based content restrictions. The Domain Name System (DNS) and it acts like a phonebook for the internet, translating website names like google.com into network locations that your computer can understand. If a site is blocked it’s usually because the DNS server you’re using has been told not to resolve that domain name.
To circumvent these restrictions you can modify your network’s DNS configuration to use a public DNS server that doesn’t apply regional or policy-based blocks. Common alternatives are 8.8.8.8 and 8.8.4.4 from Google or Cloudflare DNS 1.1.1.1 and 1.0.0.1. These services operate without content bias and they usually refrain from filtering by regulatory rules.
For Windows users you can change your DNS settings by going to Network and Internet Settings, choosing your current network adapter, clicking Properties, then IPv4 properties. This is where you specify the new DNS addresses. For Mac users go to System Settings, Network, select your connection, click More Settings, then DNS, and enter the alternative addresses. On mobile devices like Android or iPhone you’ll find DNS options under Wi-Fi settings by long-pressing your connected SSID.
After making these DNS changes restart your application and system to make sure the changes take effect. You should now be able to access sites that were previously blocked. Note that changing DNS doesn’t anonymize your traffic or protect your data in transit. To improve anonymity consider using a encrypted tunnel service combined with custom DNS.
Some filters are immune to DNS changes because enterprise networks implement layered blocking like IP address blacklisting or deep packet inspection. But for many common cases switching to a public DNS server is a straightforward and cost-free fix. Ensure compliance with your institution’s rules when making these changes.