1. draft-wing-behave-http-46-relay-02 1 Relaying HTTP from IPv4 to IPv6 draft-wing-behave-http-46-relay-02 IETF 76 – Hiroshima November, 2009 Dan Wing, dwing@cisco.com

2. draft-wing-behave-http-46-relay-02 2 HTTP 4/6 Relay Useful for IPv6-only Servers Similar technique used today for IPv4 servers –Dyndns.org WebHop HTTP is the most critical application –80% / 20% http://www.dyndns.com/services/webredirect

3. draft-wing-behave-http-46-relay-02 3 Mechanism 1: HTTP Relay Relay TCP traffic through an HTTP server HTTP Server uses clients Host: header to route HTTP traffic Layer 7 overhead (in HTTP relay) all incoming IPv6 connections come from HTTP relay –X-Forwarded-For header

4. draft-wing-behave-http-46-relay-02 4 Mechanism 2: HTTP Redirect Only initial TCP traffic hits HTTP server HTTP Server uses clients Host: header to send appropriate HTTP 302 redirect to client Layer 3 overhead (in translator)

5. draft-wing-behave-http-46-relay-02 5 Making it Pretty Long URLs are ugly –http://v6v4-1.sanjose.ca.example.net:28333 Can be obscured using HTML frames –Visit http://demo.employees.org

6. draft-wing-behave-http-46-relay-02 6 Questions draft-wing-behave-http-46-relay-02