Ok guys im trying to setup my existing and fully functional squid 3.1.6 box on squeeze to talk to an identical squid box upstream, but it is not working, I cant see any requests in access.log on the upstream box of the downstream box fetching from it. cache.log shows the following upstream box (parent): 2012/01/23 00:17:15| Adding nameserver 192.168.1.1 from squid.conf 2012/01/23 00:17:15| Accepting HTTP connections at 192.168.1.205:3128, FD 11. 2012/01/23 00:17:15| Accepting ICP messages at [::]:3129, FD 12. 2012/01/23 00:17:15| HTCP Disabled. 2012/01/23 00:17:15| Configuring Sibling 192.168.1.40/3128/3129 2012/01/23 00:17:15| Loaded Icons. 2012/01/23 00:17:15| Ready to serve requests. downstream box (sibling):(should I even conf this as a sibling? 2012/01/23 00:19:11| Adding nameserver 10.10.1.1 from squid.conf 2012/01/23 00:19:11| Accepting HTTP connections at 10.10.1.105:3128, FD 11. 2012/01/23 00:19:11| Accepting ICP messages at [::]:3129, FD 12. 2012/01/23 00:19:11| HTCP Disabled. 2012/01/23 00:19:11| Configuring Parent 192.168.1.205/3128/3129 2012/01/23 00:19:11| Loaded Icons. 2012/01/23 00:19:11| Ready to serve requests. ====================================================================== relevant squid.conf entries upstream box (parent) http_port 192.168.1.205:3128 hierarchy_stoplist cgi-bin ? icp_port 3129 cache_peer 192.168.1.40 sibling 3128 3129 default icp_access allow all downstream box (sibling): http_port 10.10.1.105:3128 hierarchy_stoplist cgi-bin ? icp_port 3129 cache_peer 192.168.1.205 parent 3128 3129 default prefer_direct off icp_access allow all ====================================================================== Also note that Nmap UDP -sU port scans from both hosts to eachother, show no open port on 3129 which im using for my ICP port. Yes I have them open in iptables with -A INPUT -p udp -m udp --dport 3129 -j ACCEPT and tried -A INPUT -p udp --dport 3129 -j ACCEPT ====================================================================== Gentlemen, the fail whales tail is slapping me in the face repeatedly what am I doing wrong??? ====================================================================== deviant:/var/www# squid3 -v 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=' 'CPPFLAGS=' 'CXXFLAGS=-g -O2 -g -Wall -O2' --with-squid=/build/buildd-squid3_3.1.6-1.2+squeeze2-i386-PV_6Lv/squid3-3.1.6