Somehow, the loop detection has changed! In 3.0 and 3.1 I could use: cache_peer proxy-cvk-1.charite.de sibling 8080 3130 default cache_peer proxy-cvk-2.charite.de sibling 8080 3130 default cache_peer proxy-cbf-1.charite.de sibling 8080 3130 default cache_peer proxy-cbf-2.charite.de sibling 8080 3130 default on all 4 proxies, and each proxy had an "include" with: include /etc/squid3/unique_hostname.conf which would contain: visible_hostname proxy-cvk-1.charite.de # on proxy-cvk-1.charite.de of course! This doesn't work with 3.2.0 anymore. The goal is to use "mostly" identical configs an all 4 hosts! -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt@xxxxxxxxxx | http://www.charite.de