31. The Teredo Client and native IPv6 host then use the relay for communication as long as they need to. 32. This was designed to protect the piles from the attacks of a marine insect called teredo navalis or cobra. 33. Most Unix systems implement only 6to4, but Teredo can be provided by third-party software such as Miredo. 34. It is, however, possible to spoof Teredo packets with the Teredo server IPv4 address set to a martian. 35. It is, however, possible to spoof Teredo packets with the Teredo server IPv4 address set to a martian. 36. Teredo alleviates this problem by encapsulating IPv6 packets within UDP / IPv4 datagrams, which most NATs can forward properly.37. In effect, a host that implements Teredo can gain IPv6 connectivity with no cooperation from the local network environment. 38. Teredo clients are assigned an IPv6 address that starts with the Teredo prefix ( 2001 : : / 32 ).39. Teredo clients are assigned an IPv6 address that starts with the Teredo prefix ( 2001 : : / 32 ). 40. This design means that neither the Teredo server nor client needs to know the IPv4 address of any Teredo relays.
