How to deal with DNS pollution?
DomainCn
Have you ever been repeatedly redirected to an unfamiliar page when visiting a website? Or perhaps the website never opens even after you've entered the correct URL? These situations are often caused by DNS pollution. So, what exactly is DNS pollution, and how can we address it?
DNS pollution occurs when a DNS server returns an incorrect IP address, preventing users from accessing the intended website. This situation is particularly common in certain regions and may be caused by censorship, malicious attacks, or deliberate interference by ISPs (Internet Service Providers). In this situation, we need to take steps to protect our online security and browsing experience.
Using a public DNS server is an effective solution. Many users rely on the DNS service provided by their ISP, but these services may be polluted or restricted. In contrast, public DNS services like Google DNS (8.8.8.8 and 8.8.4.4) and Cloudflare DNS (1.1.1.1) are generally more stable and less susceptible to pollution. Simply change the DNS address in your device's network settings to enjoy a faster and more secure online experience.
It's also a good idea to regularly clear your DNS cache. The DNS cache is the mapping between domain names and IP addresses that your device stores to speed up access. If incorrect information is stored in the cache, it can cause access issues. On Windows, you can clear the cache by entering "ipconfig /flushdns" in the Command Prompt. On Mac, you can use the "sudo killall -HUP mDNSResponder" command. After clearing the cache, try accessing the website again and the problem may be resolved.
It's also crucial to keep your devices and applications updated. Many cyberattacks and DNS poisoning methods exploit software vulnerabilities. Keeping your operating system and applications up to date can effectively prevent these security risks. Using antivirus software and a firewall can also provide an extra layer of protection against malware.
If you notice that a website is frequently inaccessible while others are working, this could be a sign of DNS poisoning. By observing these anomalies, you can take timely action to avoid further problems.
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