Chapter 11. IPv6 to IPv4 Network Address Translation (NAT64)
The last chapter covered NAT44, in which the source or destination or both IPv4 address fields in a packet are rewritten to a different address. This chapter continues the concept of packet translation but takes it to a higher level of complexity. Instead of just changing an IP address in a packet’s source or destination address field, the mechanisms discussed in this chapter also remove the entire header of an IP packet and replace it with a different header—an IPv4 header is replaced with an IPv6 header, or vice versa. The purpose is to provide a translation service between IPv4 and IPv6 devices.
As this book is being written, we are in the early transitional phase from IPv4 to IPv6. ...
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