We use LVS (load balancer) to send traffic to multiple Squid 2.5 servers in reverse proxy mode. We want to put multiple Squid instances on one box and have successful done that by changing: http_port 80 to http_port 192.168.60.7:80 in the squid.conf file. We tested to that instance of squid and worked successfully. Once it is added to the LVS load balancer the site no longer works. I'll check with the LVS group also.