The following message will appear in your browser when trying to connect to the blocked site: Unable to connect. Or. Your Internet access is blocked Firewall or antivirus software may have blocked the connection ERR_NETWORK_ACCESS_DENIED. In your AD domain you can deploy a Windows Firewall policy to block access to a website on user computers using GPO. However, it is not rational. Using Windows' HOSTS file is a quick and painless way to block websites (such as Facebook, ad networks, or malicious websites) on your machine. In the past blocking websites using the HOSTS file was (is) as easy as editing the HOSTS file and adding the websites/servers you want to block.
For instructions on how to do this check your firewall software's website. Your router's firewall On your router, you would need to open the following ports; 443, 43594 and 43595. This will vary depending on your make and model of router, and instruction booklets are often included with your router or can be found on the manufacturers website.
The internet is highly censored in China through the use of the so-called “Great Firewall” web filter. A large number of websites and apps are blocked in mainland China. Most Chinese netizens are unaffected by this internet censorship as the vast majority of blocked websites are non-Chinese in content and language.