Most web servers maintain logs of all traffic, and record the HTTP referrer sent by the web browser. This raises a number of privacy concerns, and as a result, a number of systems to prevent web servers being sent the real referring URL have been developed. These systems work either by blanking the referrer field or by replacing it with inaccurate data. R.otd.to is one of these free resource for quality derefering services. Backdoor your internet history by using friendly dereferer service.