Dear all i use squid & ad_auth in my company spec: squid server : OS: CentOS 4.4 Squid: http://people.redhat.com/stransky/squid/ squid-2.6.STABLE7-1.RHEL4 samba&winbind: samba-3.0.10-1.4E.9 samba-client-3.0.10-1.4E.9 samba-common-3.0.10-1.4E.9 krb5: krb5-workstation-1.3.4-33 krb5-libs-1.3.4-33 krb5-devel-1.3.4-33 W2k3 AD server : Proxy & AD auth is fine work on my system... but i just want to know , when user have some problem.. how can i do to debug the system.. i mean , i don't know what is the process on the squid and AD working... i want to know detail the squid and ad process.. can any one tell me ... thank you