Your IP address is sent to all Web sites you visit. While no one can determine the exact address directly from your IP address, there are ways to infer this information with elaborate monitoring systems. Think of your IP address as a serial number, a unique identifier, some sites can use to identify you when you visit.
For example, say you make a purchase from an online store that sells toasters. Once you pay for that fancy new four slicer, the storage of records of your name, address information, credit card, and your IP address. Since the shop keeps your toaster no private information private, you have to worry about. But you can say the same thing for the site that you just used to sign up for a free plasma TV?
This is where advertising comes most ads on various sites came from only a handful of companies, and companies that are full looking at their ads, even when you do not click on them. If you view a page on a news site that displays a banner ad hosted by, say, or adknowledge.com targetnet.com, and then register to win a free TV on another site that has another ad agency, this server ad knows that you have visited both sites. Moreover, if the advertising agency is in cahoots with people who are giving away the TV, they have your address e-mail, address, shoe size, and anything else that you entered in the lottery sign-up page.
Now, most people have IP addresses dynamic, changing each time you start a connection, but a single IP can stay active all day (or a router, for weeks at a time), which means your IP address can be used to control some of their online activity. And with a geolocation tool as http://www.yougetsignal.com/, anyone can find your approximate location. Moreover, many unscrupulous websites use so-called tracking cookies to do the same thing, ie Mark your PC with a unique serial number that can be read as you visit many different sites. So how can you stop the gossip? Most software anti-spyware is designed to scan your system and delete the tracking cookies it finds, but you may want to take it one step further and set up your browser not to accept cookies from those sites. You can get a list of sites known trace http://www3.ca.com/securityadvisor/pest/browse.aspx?cat=Tracking Cookie. (If this seems an exaggeration, just block the sites responsible for the cookies from your anti-spyware is on your PC). To block cookies in Internet Explorer, go Tools? Internet Options, choose the Security tab and then click Sites. In Firefox, go to Tools? Options, choose the category of Privacy, expand Cookies section, and then click Exceptions. Or, SeaMonkey, go to Tools? Manager cookie? Manage Stored Cookies.
Then install ad-blocking software such as Adblock extension described in "Stop Annoying Animations," and use a proxy server to mask your IP address.
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