10.0.2.110 is the machine run squid and dansguardian, thank you for your reply. ----- Original Message ----- From: "Henrik Nordstrom" <henrik@xxxxxxxxxxxxxxxxxxx> To: "zhang yikai" <yikaikai@xxxxxxxxx> Cc: "Amos Jeffries" <squid3@xxxxxxxxxxxxx>; "Kinkie" <gkinkie@xxxxxxxxx>; <squid-users@xxxxxxxxxxxxxxx> Sent: Tuesday, November 11, 2008 3:32 PM Subject: Re: Run squid2.5.6 and dansguardian got error message: (111) Connection refused