11. This provides a short path between their IPv6 network and any Teredo client. 12. Teredo servers can also transmit ICMPv6 packet from Teredo clients toward the IPv6 Internet.13. Teredo servers can also transmit ICMPv6 packet from Teredo clients toward the IPv6 Internet. 14. Teredo is not compatible with all NAT devices.15. The initial nickname of the Teredo tunneling protocol was " shipworm ". 16. Encoding format encodes the Teredo server address and tunnel information before the IPv4 client address. 17. Christian Huitema developed Teredo at Microsoft, and the IETF standardized it as RFC 4380. 18. Also, blocking of outgoing traffic to UDP port 3544 can interfere with Teredo activity. 19. Some bones show evidence of boring by the marine shipworm " Teredo ". 20. The Teredo server listens on 3544.