Hi, I would like to allow other user (such as apache) to use tc since I'll now working on a web interface for tc. How can I do that?? I'm using shell_exec() in php. I've added apache to the root group and can run tc without problems. However,, when I ran tc class, it said "RTNETLINK answers: Operation not permitted". Thanks in advance, William __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com