Nп/п : 53 из 100
От : Dan Clough 1:135/115 07 ноя 25 21:15:52
К : Michiel van der Vlist 07 ноя 25 06:30:02
Тема : Re: What sense is a tunnel? (was: `-Unpublished-` with speed > 300)
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-=> Michiel van der Vlist wrote to Dan Clough <=-
DC> I would like to throw this out there, though - what sense does it make
DC> to use a 6-to-4 tunnel for this? If v4 goes under, doesn`t the
DC> tunnel also no longer work? What`s the point of that? When v4 dies,
DC> my ISP would (hopefully!) offer v6 and I`d be in the club. My
DC> thoughts are that if it isn`t available to me natively, what *actual*
DC> use would a tunnel kludge provide to me?
MvV> A valid point. For a tunnel to function you do indeed need a working
MvV> IPv4 connection. So what is the use of the tunnel anyway?
MvV> 1) You still have fully flegded IPv4 from your provider but not
MvV> everywone else in the world is that lucky. The number of people that
MvV> have to make do with a so called CGNAT IPv4 address is rising. CGNAT is
MvV> a technology used by providers to have many customers share a single
MvV> public IPV4 address. It is similar to NAT on your own LAN where a
MvV> single IPv4 adress is used by many devices on your LAN. With the
MvV> difference that there is no port forwarding available for the customer.
MvV> Those who`s provider uses this technology to deal with the shortage of
MvV> iPv4 adresses can only run servers that are accessable via IPv6. To
MvV> connect to those servers you need IPv6 and if your provider does not
MvV> support native IPv6, you can make use of a tunnel. This has not yet
MvV> have a great effect on Fidonet, but the number of sysops confronted
MvV> with CGANAT is rising.
Okay, so I can see that (running a server in an area only served by
CGNAT) as being a valid reason to want/need IPv6. I guess I didn`t know
that kind of thing was already happening. Certainly haven`t seen or
heard of it being a thing where I am.
MvV> 2) You can use a tunnel to experiment with IPv6 and prepare for the day
MvV> in the near or not so near future that installing IPv6 will be
MvV> unavoidable.
A little less valid than the CGNAT scenario, but maybe... OK.
MvV> 3) To put pressure on your ISP. If the provider sees that his costomers
MvV> are using tunnels to connect via IPv6 with the rest of the world they
MvV> may wake up. In any case it is a counter argument to what providers
MvV> dragging their feet often use: there is no demand for IPv6 from our
MvV> customeres.
From a technical perspective, *can* the ISP "see" that I was using a
tunnel? I would think they could not, and I`m fairly confident they
wouldn`t care or "wake up". One reason they haven`t provided it would
be because it would cost them money to do so, and.... they don`t want to
do that because it hurts profit margins.
MvV> 4) And last but not least; what happened to that pioneer spirit that
MvV> made Fidonet sysops try out and help further develop new technologies?
I`m really not sure that exists much any more. I do understand what you
mean, and experienced it myself back in FidoNet in the 1990`s. Nowadays
though, we are saturated with new technology every day, and it isn`t
nearly as exciting as it used to be, because we`ve gotten used to rapid
advances in tech and capabilities. It`s become just routine now.
MvV> Hope this helps.
It actually did. Thanks for taking the time to explain it.
... Gone crazy, be back later, please leave message.
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