Purple Sun Proxy

To specify the data of a proxy server in the Opera browser, you need to follow the algorithm below:

Open the browser.
Click on the Opera icon in the upper left corner.
Go to "Settings".
Select the "Advanced" option.
Scroll down to the "System" tab.
Click "Open proxy settings for computer".
Click on "Network settings".
Activate the "Use a proxy server" option.
In the tab that opens, specify the IP address of the proxy server. The address must be entered in the field of the protocol to which the proxy server belongs. You can get this information from your proxy provider. Click "OK" to save your settings.

In the browser menu (top right corner), find "Settings", and then, under "Network settings", go to "Settings" to select "Manual network configuration". Enter, depending on your network protocol, the IP address, the port and click on "OK". Open any website and in the window that appears, enter the proxy password and login, then click "Ok" again. A successful connection to the site means that the setup is successfully completed.

In the messenger settings, go to "Data and Drive". Click on "Proxy settings", and then, enabling the "Use proxy settings" tab, enter the server, port, username and password in the specially highlighted fields. If you are going to make settings in the Desktop version, you will need to go to the menu. There, in the "Connection method" item, click on "TSP via Socks5" and enter the required data.

Disable proxy settings in Windows:

Press the Windows key + R to open the Run dialog.

Type "inetcpl.cpl" (without quotes) and press Enter to open the Internet Properties window.

In the Internet Properties window, click on the "Connections" tab.

Click on "Lan settings" in the bottom right corner of the window.

In the "Proxy Server" section, select "Automatically detect settings" and uncheck the box for "Use a proxy server for your LAN."

Click "OK" to save the changes and close the window.

In CentOS, if there is no graphical interface (from the terminal), proxy configuration is done through the export http_proxy=http://User:Pass@Proxy:Port/ command. Accordingly, User is the user, Pass is the password to identify you, Proxy is the IP address of the proxy, and Port is the port number. If you have DE, the configuration can be done via Network Manager (as in any other Linux distribution).