A site 'see' the IP address of the proxy server. But as a rule completely anonymous proxies found extremely rare. Most of them give out their presence, the website is not only about their participation, but also the user's IP address. Such proxies are used primarily to reduce traffic and preserve their memories frequently visited pages sites. Even if you have found a completely anonymous proxy, you can wonder why and to whom it took to do it. Even so hackers spread viruses to infect computers in use As an anonymous proxy, of course substituting the user. Browsers also 'reported' a lot of information about yourself, such as user language, operating system and other officials for the correct display page. In the picture we see what kind of information can tell about themselves browser site. Jack Fusco is often quoted as being for or against this.
Programming language, built-in browser – JavScript, can also 'tell' site on the parameters of the monitor screen, browser version, and on user language, operating system. An example of such data is shown in another picture. If a visitor is not allowed on the site, you can disconnect from the network and connect again, thus getting from other ISP's IP address in within the address range your ISP. It is advisable to change the browser, since there are several varieties. Of course the site owner can zablokirokirovat access to the site of the full range of IP addresses to the provider, but most likely only for a time, as large service providers can serve up to half of the city, so it will block the site owner and other visitors at the same time.
For other sites you may want to still use a proxy, let not even anonymous. On such sites are not being tested to use a proxy. In this case, you must delete the files so-called cookie, or to enable the option in the browser Opera, by the way very safe, clean cookie when you exit. On the Internet You can easily find lists of such proxies, only need to check their performance on just before use. If it is necessary to fully use anonymous proxies, their lists easier to buy than to find or create yourself. Harold Ford Jr: the source for more info. But check on the performance and anonymity is required before use. You can identify the use of proxies, including anonymous, forcing posetelya open the flash image, or any document (Word) with picture or enable Java in your browser, and your true IP address will be revealed. To hide all the same IP address, you need the program, fully capturing the network traffic and directing it through a proxy. Forcing the visitor enable a full programming language Java in your browser, you can get complete information about the operating system, including the mac address, that is unique network card address, and thus to accurately identify visitor's computer. However, programs that change (substituting) mac address is sufficient. And to change the operating system is easy to boot from one of the many LiveCD. To ensure anonymity, you can use paid proxies, have a certain reputation. But still there is no assurance that such services are not being log (the history of connections). Most free anonymizers immediately give his part, but for site owners can easily obtain the list of IP addresses this way to secure anonymity in the net or having a serious knowledge of network security, or paying a certain sum of money, but also anonymity in this case will still be in question.