Voir : https://wiki.squid-cache.org/ConfigExamples/Authenticate/WindowsActiveDirectory
squid.conf
httpd_suppress_version_string on auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp --domain=aspaway.fr auth_param ntlm children 50 auth_param ntlm keep_alive off acl ntlm proxy_auth REQUIRED http_access allow localnet ntlm
wbinfo -t wbinfo --ping-dc ntlm_auth --diagnostics --username=jean --domain=acme.fr