Define proxy settings
What is a proxy?
A web proxy filters websites that you look at, it receives requests from your web browser to fetch web pages and their elements, and following a policy will decide to pass them you back. They are commonly used in businesses and at public wireless hotspots to control what websites you can look at, prevent you from accessing the internet without logging in, or to do security checks on websites.
Change proxy method
Open the Activities overview and start typing Network.
Click on Network to open the panel.
Select Network proxy from the list on the left.
Choose which proxy method you want to use from:
The applications will use a direct connection to fetch the content from the web.
For each proxied protocol, define the address of a proxy and port for the protocols. The protocols are HTTP, HTTPS, FTP and SOCKS.
A URL pointing to a resource, which contains the appropriate configuration for your system.
Applications that use the network connection will use your specified proxy settings.