System and Method for Network Security Including Detection of Attacks Through Partner Websites

A computer readable storage medium with instructions executable on a host computer. The instructions record a relationship between a partner site and the host computer, substitute a reference to the partner site with a partner site alias referencing the host computer, deliver the partner site alias to a client, replace the partner site alias for the reference to the partner site in response to receiving the partner site alias from the client and augment the address of the client with an address alias. The address alias is sent to the partner site. A partner action and the address alias are received from the partner site. The address is exchanged for the address alias. The partner action is delivered to the client utilizing the address. These operations are monitored to identify client activity that constitutes a security threat at the host computer or the partner site.