| 摘要 |
<p>The invention is concerned with a method for sending a message ona computer network from a first computer system to at least one other computer system through a firewall. The method comprises the following steps: a request with data for a new connection between the first computer system and at least one other computer system is sent from the first computer system to the firewall for a message to be sent between said computer systems. Up on approval of the connection by the firewall, information about necessary modifications to be made in a message that is sent via the requested connection through the firewall is sent from the firewall to the first computer system. The message to be sent is modified in the first computer system in accordance with the information sent from the firewall. Optionally, and before or after the foregoing step, identification data of the connection for the message to be sent between said computer systems is sent from the first computer system to the firewall so that the connection for the message can be identified by the firewall and the message can pass the firewall. The message is sent from the first computer system to the at least one other computer system through the firewall. The message to be sent between said computer systems can be protected after it has been modified, whereby the data to be sent from the first computer system to the firewall includes the necessary information so that the connection for the message can be identified by the firewall.</p> |
