I've setting the "auth digest" and all is working, but i don't understand this: which is the control parameter for setting the auth request interval? At random time squid display the authentication form. Is possible to set squid for auth request only when i start the browser (or after a long period ex. 1 hour)? Is this browser dependent? I've found this two parameters, but i don't understand how set these. - authenticate_cache_garbage_interval -authenticate_ttl Thanks, Luca.