DNS pollution is a network attack method that affects the domain name resolution process, causing user access to be hijacked to the wrong IP address, thereby accessing malicious or misleading websites. Solving DNS pollution problems may require a combination of methods. Here are some possible solutions:

　　​Change DNS server:

　　You can try changing your network settings to use another reliable DNS service provider, such as Google DNS (8.8.8.8 and 8.8.4.4) or Cloudflare DNS (1.1.1.1). These DNS service providers generally have better security and resistance to DNS pollution.

　　Set up DNSSEC:

　　DNSSEC (Domain Name System Security Extensions) is a security extension used to protect domain name resolution and can help prevent DNS pollution. You can check whether your domain name registrar or DNS service provider supports DNSSEC and enable it in the domain name settings.

　　Update router firmware:

　　In some cases, the router's firmware may have vulnerabilities and be vulnerable to DNS pollution attacks. Make sure your router firmware is up to date to reduce security risks.

　　Regular inspection and maintenance:

　　Regularly check your network settings and devices to make sure they have not been affected by unauthorized changes or malware.

　　Contact your ISP:

　　If you suspect that DNS pollution is caused by your Internet Service Provider, you can contact them for a solution.

　　It’s important to note that DNS pollution may vary by region, network provider, and type of attack, so there is no one-size-fits-all solution. The best thing to do is to take a variety of measures to improve the security and stability of your network.