I found this in the documentation: A redirector receives data from Squid on stdin one line at a time. Each line contains the following four tokens separated by whitespace: Request-URI Client IP address and fully qualified domain name User's name, via either RFC 1413 ident or proxy authentication HTTP request method Of course I would really like to be able to rewrite/redirect based on the referer header from the client. Is there a way to add the referer to the redirector? Is this something that will be included in a future release? Or is there another way to implement this in today's code base? Thanks in advance, Max