Unable to connect to the Internet host file settings abnormality

Title: Solution to the inability to access the Internet due to abnormal hosts file configuration

Introduction:
The hosts file is a very important configuration file in the computer, used to associate a specific IP address with the corresponding domain name stand up. However, sometimes due to some configuration errors, the hosts file may cause users to be unable to access the Internet normally. This article will introduce some common hosts file configuration abnormalities and their solutions to help readers restore Internet access.

1. Possible reasons for abnormal hosts file configuration:

1. Error editing: Users may make errors when editing the hosts file, such as format errors, duplicate entries, spelling errors, etc. .
2. Malware modification: Some malware may modify the hosts file, causing users to be redirected to unsafe websites or display error pages.
3. Firewall settings: The firewall may intercept certain entries in the hosts file, resulting in the inability to correctly resolve the domain name.

2. Methods to solve the abnormal configuration of hosts file:

1. Check and correct the hosts file:
   a. Open the hosts file (path: C:WindowsSystem32driversetchosts).
   b. Make sure the file is opened with administrator rights.
   c. Check the contents of the file to see if there are any incorrect entries or spelling errors.
   d. Correct incorrect entries and delete duplicate entries.
   e. Save the file and restart the computer to check whether the Internet access function is restored.
2. Remove malware:
   a. Run anti-virus software for a full scan to detect and kill malware.
   b. Use special tools to remove hosts file entries modified by malware.
   c. Regularly update anti-virus software and operating system to keep the system safe.
3. Check the firewall settings:
   a. Open the Control Panel and select "Windows Defender Firewall".
   b. Click "Advanced Settings" to check whether there are relevant inbound rules or outbound rules to intercept the hosts file configuration.
   c. If there are relevant rules, disable or modify them.
   d. Save the settings and restart the computer to test the Internet access function.
4. Access Internet resources:
   a. Connect to the Internet through other devices or mobile phones, and check whether the website can be accessed normally.
   b. Visit a website such as ipaddress.com and query the IP address of the target website.
   c. Manually add the queried IP address to the hosts file, save and restart the computer to test the Internet access function.

Conclusion:
The hosts file is a very important part of network connection. Abnormal configuration may cause users to be unable to access the Internet normally. This article provides some common hosts file configuration abnormalities and their solutions, hoping to help readers solve the problem of being unable to access the Internet. If the above methods cannot solve the problem, it is recommended to contact the network service provider or technical support staff for further consultation and resolution.

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