Systems, methods, and apparatus, including computer program products, for securing access to a server computer that is operable to process client requests from a client computer. A firewall is located between a dispatcher and the server computer. The firewall prevents requests from the dispatcher's side of the firewall from crossing through the firewall. The dispatcher is operable to establish a static connection with the server computer through the firewall, to receive a client request transmitted from the client computer, and to transmit the client request to the server computer through the static connection.