Dear All: I am running a squid 3.0 on a centos box and set it as http_port 3128 transparent It has been working well for a while. Then I noticed a traffic spike. tcpdump shows that there are a lot of traffic from port 3128 to other clients. I have disabled incoming traffic to 3128 from outside. What could be the reason? Someone hacked my cache? Best Regards, Young Wen