So what am I missing in the following situation? Our mail dept uses shiprush.com. The software supplied by shiprush is not proxy-auth friendly, so I added a acl ShipRush dstdomain .shiprush.com and http_access allow campusnet ShipRush before my http_access line requiring authentication. Yet I still see Squid3 requesting auth [1]. What am I doing wrong? I've supplied my squid.conf in redacted form [2]. (General comments welcome as well as those specific to this problem.) Kind Regards, Chris Misc Info: OS: Ubuntu 10.04.4 LTS Squid Cache: Version 3.1.6 configure options: '--build=i486-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=${prefix}/lib/squid3' '--disable-maintainer-mode' '--disable-dependency-tracking' '--disable-silent-rules' '--srcdir=.' '--datadir=/usr/share/squid3' '--sysconfdir=/etc/squid3' '--mandir=/usr/share/man' '--with-cppunit-basedir=/usr' '--enable-inline' '--enable-async-io=8' '--enable-storeio=ufs,aufs,diskd' '--enable-removal-policies=lru,heap' '--enable-delay-pools' '--enable-cache-digests' '--enable-underscores' '--enable-icap-client' '--enable-follow-x-forwarded-for' '--enable-auth=basic,digest,ntlm,negotiate' '--enable-basic-auth-helpers=LDAP,MSNT,NCSA,PAM,SASL,SMB,YP,DB,POP3,getpwnam,squid_radius_auth,multi-domain-NTLM' '--enable-ntlm-auth-helpers=smb_lm,' '--enable-digest-auth-helpers=ldap,password' '--enable-negotiate-auth-helpers=squid_kerb_auth' '--enable-external-acl-helpers=ip_user,ldap_group,session,unix_group,wbinfo_group' '--enable-arp-acl' '--enable-esi' '--disable-translation' '--with-logdir=/var/log/squid3' '--with-pidfile=/var/run/squid3.pid' '--with-filedescriptors=65536' '--with-large-files' '--with-default-user=proxy' '--enable-linux-netfilter' 'build_alias=i486-linux-gnu' 'CFLAGS=-g -O2 -g -Wall -O2' 'LDFLAGS=-Wl,-Bsymbolic-functions' 'CPPFLAGS=' 'CXXFLAGS=-g -O2 -g -Wall -O2' --with-squid=/build/buildd/squid3-3.1.6 [1] https://docs.google.com/file/d/0B5GhqVvpzpvjVE5MX2drM21HNW8/edit?usp=sharing [2] https://docs.google.com/file/d/0B5GhqVvpzpvjWjhQUnc4UDNweUk/edit?usp=sharing