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group no CC7- cite seer
Rajani.B.V
Priyonath Banerjee
Masudur Rahaman
Poonam R Bhawnani
Question for proxymity group:
Tuesday, October 20, 2009
Q1.Can the ip address be detected or traced back if you are using anonymous proxy server? if yes in what situations and how (in brief)..
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Yes, there are a number of possibilities not only to detect a visitor using several anonymous proxy servers, but also to detect his real IP even if he is using an anonymous proxy server.
I have listed down a few situations.
a.)Cookies:
Cookies are not anyhow related to proxy servers. Cookies are used to transfer small portions of information from the web server to the client as an addition to the requested web page. This additional information is stored in the client's browser and is retrieved by the web server. Cookies can be both temporary (for one-time use during a web session; when the session is over, these cookies are deleted) and long-term (for continuous store on the client's machine). For example, if the password is requested while checking your e-mail box. After you have entered the password, it is stored in cookies, so each time you browse from page to page, the web server would check the password in the cookies instead of asking for it on every page. You cannot detect IP with the help of cookies directly. However, when you first visit a web site, the IP (i.e. your proxy server s IP) is detected by the web server and then stored in the cookies. When you re-visit this site, the web server detects your IP again and checks it with the one stored in the cookies. If the IPs are not the same, the web server can make certain conclusions.
b.)JavaScript / vb script:
There are special subprograms (scripts) run by the client s browser. Therefore, no matter how hard you try to setup your browser (unless you disable these active scripts), you won't be able to hide your real IP. These scripts are actually classified as simple programs and have very limited number of functions, however they are able to detect your IP as well as many other settings of your browser.
c.)Java:
Unlike JavaScript, Java is a full-featured programming language. So Java scripts have many additional abilities (particularly, detecting or changing your browser settings). In other words, Java programs can easily detect your IP and partially the settings of your browser.
d.)active x and plug-ins:
active x and plug-ins are various add-ons and modules of your browser. These modules are in fact real proper programs run on the client s machine and therefore they have wider capacities than Java and JavaScript. They can easily detect your browser settings and track down your real IP address.
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