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Settings > Preferences > Advanced > Network

Press Page Down and Page Up to switch slides.

Proxy servers

A proxy server is a computer that can, for example

Click and enter the necessary information. All traffic using the respective protocol will now go through the proxy server you specify.

To use a proxy, you need to specify:

  1. A protocol (such as HTTP)
  2. An Internet address (such as proxy.example.org or
  3. A port number (such as 5000)

You can get this information from your Internet service provider (ISP), the host of your proxy server, or the documentation that comes with your proxy software.

To access certain sites without going through the proxy, you can enter a list of web addresses to exclude.

If your Internet provider requires automatic proxy, please enter the web address provided by your ISP.

Learn more about proxies

Server name completion

When you enter a single word (for example "opera") in Opera's address field, Opera will:

  1. Look for a bookmark nicknamed "opera"
  2. Search using your default search engine for "opera"

When you enter a single word in Opera's address field, followed by a forward slash (for example "opera/"), Opera will:

  1. Look for a computer in your local network called "http://opera/"
  2. Attempt server name completion by adding prefixes (such as "www") and suffixes (for example "com") to look up "www.opera.com"

You can enter comma-separated lists of prefixes and suffixes. You may for example want to add the top-level domain of your home country to the list of suffixes.

Note: It takes time to try multiple combinations; if your connection is slow, you may want to turn this feature off for faster browsing.

Tip: To skip directly to server name completion by prefix and suffix, press Ctrl+Enter.

Encode international web addresses with UTF-8

Some servers may prefer that Opera encodes the address in local character encoding (like latin-1) instead of the recommended UTF-8 encoding.

You enter http://www.example.org/æøå.html
Address in latin-1 http://www.example.org/%E6%F8%E5.html
Address in UTF-8 http://www.example.org/%C3%A6%C3%B8%C3%A5.html

Send referrer information

Some websites make note of the page you visited immediately before arriving at that site. Uncheck "Send referrer information" if you do not want websites to know which site you came from.

Note: Some sites depend on referrer information to work properly.

Enable automatic redirection

Some webpages automatically redirect you to another page or site. Uncheck "Enable automatic redirection" if you would rather stay in control by clicking redirection links.

Max connections to a server

It is recommended to keep the default setting of 16, but you can try changing the maximum number of connections to a single server if you are experiencing problems with browsing speed.

Max total connections

It is recommended to keep the default setting of 64, but you can try changing the maximum number of connections to all servers if you are experiencing problems with browsing speed.

Site preferences

Network preferences can also be specified per site. In addition to the encoding, referrer, and redirection settings, the network site preferences also offer the option of changing how Opera presents itself to the site.

When a web browser connects to a website, it tells the site which browser it is. Some websites will then provide content tailored for particular browsers. However, as browsers are in constant development, assumptions made by site designers may not always have the intended effect.

If you experience problems with a site, try changing your browser identification in the site preferences, then press F5 to reload the page.

Note: Selecting "Identify as" means Opera will present itself as another browser, while still mentioning that it's Opera. Selecting "Mask as" completely hides Opera's identity, which is rarely necessary, but sometimes helps when visiting badly designed or broken sites.