The network settings that may affect your security and privacy mainly have to do with proxy servers. A proxy server collects information from the Internet and stores it locally, making the information available for viewing by anyone using proxy server. If your Internet service provider (ISP) has a proxy server available, configuring Opera to go through this proxy could speed up your surfing.

Proxy Server Settings

HTTP and HTTPS

Do not use a proxy server for HTTP or HTTPS unless you have particular reasons to do so. Opera is more than suited to handle these protocols. HTTPS is the secure version of the hypertext transfer protocol, and Opera can handle the highest levels of Internet security available. If you use a proxy server to handle HTTPS content, you are reducing your computer's level of security to that of the weakest application, which could be your proxy server.

Most HTTPS proxies simply pass on data and do not save or interpret the information that passes through them. This is because the information is encrypted. In special cases, it is possible for a proxy server to decrypt the information and act as a man in the middle. In such cases, Opera will display a warning unless you have already accepted and installed a certificate for the proxy in question.

Other settings

Advanced users may want to use a proxy server for most sites, but exclude some. This option is available and is activated by selecting "Do not use proxy on the addresses below". If you want to access certain sites directly, Opera will not use a proxy server for the Internet addresses you specify. 

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