| 摘要 |
A system, method and apparatus are described herein that allow a mix computers or other devices that are configured for communication in accordance with different network layer protocols, such as Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6), to share a single physical connection to a WAN. To achieve this, a networking device such as a router resides between a plurality of local devices and the physical connection to the WAN and routes network layer packets between the local devices and the WAN. The networking device determines whether each local device is IPv4-capable or IPv6-capable. Based on this determination, the networking device selectively applies Network Address Translation (NAT) and optional firewall functionality to network traffic originating from or destined for the IPv4-capable devices, while bypassing such functionality for IPv6 network traffic originating from or destined for the IPv6-capable devices.
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