About the Browser Info Fingerprinting Tool
The purpose of this page is to provide you with a quick display of some of the information that can be determined from you when you visit a web page. It is a good idea to be aware of this especially with all the big data collection that is currently taking place and receiving a lot of media coverage. The Google machine and The Facebook are probably the two biggest examples of this.
When you visit a web page your user agent tells the server what browser, plugins and often the operating system you are running. This is a handy feature for the web site as it can then display the appropriate layout for your device or computer. It is also used in web analytics, in a web server. For example here at hackertarget.com we find that the majority of our users use the Mozilla Firefox web browser. With a growing number using Google Chrome and some using Internet Explorer. This indicates to use that generally the users of our pages may be a bit more tech savy that the average Internet user.
Fake a user agent
Faking of user is possible as it is merely a string being passed from the browser. You can fake the user agent via some applications and browsers or it can be modified using an intercepting proxy that will alter the communication on the fly. Examples of intercepting proxies are burp suite and the Zed Attack Proxy.
Injecting via a User Agent
It is even possible to perform SQL Injection via a User Agent if that code is being inserted or processed by the database and it not correctly sanitized.
The IP Address of your session is also collected during HTTP communication; this is known as the referer IP Address. It can be the machine you are browsing from or it could be a proxy you are using. Related headers are X-Forwarded-For which can reveal the original IP Address even if you are using a proxy. The proxy could be an Microsoft Threat Management Gateway, a Cisco Ironport or the popular open source Squid. Varnish is also a proxy of note that is often used for reverse proxying and is growing in popularity.