| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology for allowing terminals under control of a NAT (Network Address Translation) device to communicate each other by TCP. <P>SOLUTION: The terminal device includes a function for communicating from inside of a first NAT device with other terminal device located at inside of a second NAT device. The terminal device comprises a means for transmitting a first external port number given by the first NAT device to the other terminal device, a means for receiving a second external port number given by the second NAT device from the other terminal device, a means for receiving from the other terminal device a packet having the first external port number as a transmission destination port number and including an internal port number used by application in the other terminal device as a transmission source port number, and a means for converting the transmission source port number to the second external port number and converting the transmission destination port number to an internal port number used by application in the terminal device. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
