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On Fri, Jul 5, 2013 at 12:51 PM, Neil Winchurst wrote: > I do not understand this business about setting up a tunnel. I am just about > to do some research on it. I'm sure you've found a lot of stuff on it, but here is the basic idea. Internet traffic is sent in packets, that contain 'some information'. If you load a web page, your computer sends some packets containing the request to the web server hosting that page, and the web server sends some packets containing the page back. Think of packets as envelopes: the contain some information about where to send it to on the 'outside' and then they have content inside. IPv4 and IPv6 are basically two different kinds of envelopes. They can contain the same content, but if your router (or the router at your ISP) only knows about one kind of envelope (IPv4) and sees another kind of envelope (IPv6) it has no idea what to do with them. That's why you can't use IPv6, unless your computer, your router and your ISP all support it. The former will always do so, the latter two probably not. Tunnelling merely puts an IPv6 packet (that is, an envelope and its content) inside an IPv4 one. There is a server somewhere on the Internet that you send these packets to. It opens the envelopes and sends the IPv6 packets on to its real destination. All traffic (back) to you is sent as an IPv6 packet to that same server, which puts it in an IPv4 envelope and sends it to you. So tunnelling software does two things: it knows the address of such a server, and it knows how to stuff all your IPv6 packets into IPv4 envelopes addressed to that server. There are different protocols for tunnelling and what works best for you depend on your requirements and your limitations. Miredo (the Linux equivalent of Teredo, a protocol designed by a Redmond-based software company) is supposed to be the 'last resort', something to use if all else fails. If you are going to use IPv6 a lot, you should probably look for something else, but as it's so easy to set up (so easy that it barely deserves the term 'set up'), it's ideal for testing. Martijn. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq