| 摘要 |
The present invention relates to LAN networks for control whether requested communications are allowed or not. In the system are arranged control devices, containing lists over allowed connection cases. At the establising of a communication, the control device checks whether a requested communication is allowed or not. Verification of the users is made by that the control device via separate communication path receives a verification of at least one of the users. The communication is after that allowed depending on the contents in said list. For instance is two-way information interchange or one-way information interchange allowed. <IMAGE> |
