Kenny, My office actually tried blocking ports to stop Kazaa, but since internet access is allowed it wound up going through 80. I am willing to admit that I have less experience with ISA than many who post here, so if you have a method of port blocking that is effective at killing Kazaa I am willing to listen and learn. I can say that the method we used worked, but I had not thought of renaming the exe and testing it. Evidently, the user hadn't either. If I have some time this afternoon I'm going to try that, if you're interested I can let you know the result. Edward Smith Cerebix esmith@xxxxxxxxxxx 11003 118th Pl NE Kirkland WA 98033 (425) 576-1822 This email and any attachment contain information which is private and confidential and is intended for the addressee only. If you are not an addressee, you are not authorized to read, copy or use this email or any attachment. If you have received this email in error, please destroy it and notify the sender by return email.