| 摘要 |
<p>Disclosed are a data communication method, device and system. The method comprises: an IPv4 device receiving a first negotiation message carrying a TS load of the IPv6 device; acquiring an IP address in the TS load, wherein the IP address comprises an IPv6 address in an ACL of the IPv6 device, or comprises an IPv4 address acquired from the IPv6 address in the ACL of the IPv6 device, and the IPv6 address in the ACL of the IPv6 device comprises the IPv4 address; acquiring a negotiated TS load according to the IP address in the TS load and the IPv4 address in the ACL of the IPv4 device; and establishing a tunnel between the IPv4 device and the IPv6 device accordingly. In the embodiments of the present invention, an IPSec tunnel can be established between the IPv4 device and the IPv6 device, and the IPv4 device and the IPv6 device transmit an encrypted message through the established tunnel, so that the security of the message in the transmission process is improved.</p> |
