Hi, My system is Ubuntu 12.04.1 LTS, it is ok running the squid (V3.1.19) comes with the OS, but it is not ok when I use the squid (V3.2.5) compiled from source, Follow is the configure: ./configure --prefix=/var/squid32 --enable-delay-pools --enable-gnuregex --disable-maintainer-mode --disable-dependency-tracking --disable-silent-rules --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-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-snmp --enable-esi --enable-zph-qos --enable-wccpv2 --disable-translation --with-filedescriptors=65536 --with-large-files --with-default-user=proxy --enable-linux-netfilter --enable-ssl --enable-ssl-crtd Could you have suggestion? Thanks, Alfred.