Teredo: Protocol Upd

// Set specific Teredo server netsh interface teredo set state server=teredo.remlab.net

| Component | Role | Example | | :--- | :--- | :--- | | | The host behind the NAT seeking IPv6 connectivity. | Windows PC, Xbox One. | | Teredo Server | A well-known, globally reachable IPv4 host. Helps the client determine its external IPv4 address and UDP port (NAT mapping). | teredo.remlab.net | | Teredo Relay | A router that forwards IPv6 packets between the Teredo network and the native IPv6 internet. | ISP-operated or public relays. | | Teredo Host-Specific Relay | An optimization where a native IPv6 host acts as a relay for a single Teredo client. | Not common today. | 3.1 The Teredo IPv6 Address Format A Teredo client generates a routable IPv6 address ( 2001:0::/32 prefix) with embedded information: teredo protocol

// Test IPv6 connectivity via Teredo ping -6 ipv6.google.com // Set specific Teredo server netsh interface teredo

// Disable Teredo netsh interface teredo set state disabled Helps the client determine its external IPv4 address