Thanks Amos, I found something strange with nonce, the nonce seems never change nonce_max_count auth_param digest nonce_max_count 10 auth_param digest check_nonce_count yes auth_param digest nonce_strictness on http://www.squid-cache.org/Doc/config/auth_param/ With wireshark I'm seeing my nonce like nonce="a7qcucileAouwvp6" ok no problem, but it still the same after many requests (hundred) I also tested with auth_param digest nonce_max_duration 2 minutes, I need reload my ID/password. A bug ? or misunderstanding ? Thanks