Teredo Servers
NOTE: Teredo Prefix has been changed from 3ffe:831f::/32 to 2001:0000::/32 once the Teredo specification has been published as RFC4380. Given the fact that all the 6BONE prefixes (3ffe::/16) will be dropped from 6/6/2006 on, it is necessary to make modifications in Windows Teredo Clients to support the new IPv6 prefix.
You can find here and here more information about what Teredo is and guidelines for configuring it in your operating system.
The following are some of the availabe Teredo servers that give you IPv6 connectivity for free. For the best results, try to use one located in your own country or nearby.
Service Type: Teredo
Service Name: Teredo Server
Service Provider: Remlab
Service Description: Teredo Server providing the new 2001::/32 prefix
Service Country: FRANCE
Service URL:
Service Type: Teredo
Service Name: Teredo Server and Teredo Relay
Service Provider: Consulintel
Service Description: The Teredo transition mechanism aims to provide IPv6 connectivity to users located behind a NAT box, that is, users having a private IPv4 address (10.0.0.x, 172.16.x.x, 192.168.x.x). It is supported since Windows XP SP1 and later as well as in Windows 2003. There are also Teredo implementations for Linux and FreeBSD. You can find here more information about what Teredo is and guidelines for configuring it in your operating system.
Service Country: SPAIN
Service URL:
Service Type: Teredo
Service Name: Teredo Server
Service Provider: Microsoft
Service Description: Teredo Server provided by Microsoft. It is configured by default in Windows Teredo Implementation. It is currently providing the old 3ffe:8313::/32 prefix, so Teredo clients quoted in this Server will not get global IPv6 connectivity.
Service Country: UNITED_STATES
Service URL:
Service Type: Teredo
Service Name: Teredo Server
Service Provider: NCA Korea
Service Description: This Teredo Server is currently providing the old 3ffe:8313::/32 prefix, so Teredo clients quoted in this Server will not get global IPv6 connectivity.
Service Country: KOREA,DEMOCRATIC_PEOPLE'S_REPUBLIC_OF
Service URL:
