According to the HTTP/1.1 RFC (section 14.23) all HTTP/1.1 requests MUST contain a Host header, and all HTTP/1.1 severs MUST respond with a 400 if the Host header is missing from an HTTP/1.1 request. Tomcat 4.0b3 responds with a '200 OK HTTP/1.1' response if I send a the following GET /index.html HTTP/1.1 with no Host: header, Kevin Jones DevelopMentor www.develop.com