| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain an encryption communication apparatus transferring an ICMP message to a communication terminal on the outside of a tunnel communication path by utilizing the band efficiently. <P>SOLUTION: The encryption communication apparatus 10A for transferring each user message to a counter apparatus on an encryption communication path while encrypting and encapsulating upon receiving a user message from a communication terminal, and transferring an ICMP message received from a relay on the encryption communication path to a predetermined destination on the outside of the encryption communication path while decrypting and encapsulating comprises an ICMP reproduction data management section 60 for storing address information concerning association of information about the encryption communication path for transferring the user message and the address of the communication terminal, and a section 53 for determining the address of the transfer destination communication terminal of ICMP message based on the encryption communication path information extracted from the ICMP message received from the relay and the stored address information. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
