I am trying to block web proxies by blocking the phrase "prox" when appearing in any URL I have tried acl proxy url_regex ^prox prox$ but it didnt work. What is the correct way to write this acl, and if there is a more effective way, please inform me about it. ____________________________________________________________________________________ Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center. http://autos.yahoo.com/green_center/