Nп/п : 52 из 100
От : Michiel van der Vlist 2:280/5555 07 ноя 25 15:17:56
К : Dan Clough 07 ноя 25 17:47:01
Тема : What sense is a tunnel? (was: `-Unpublished-` with speed > 300)
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*** Answering a msg posted in area NODELIST-POLICE (NODELIST-POLICE).
Hello Dan,
On Thursday November 06 2025 22:07, you wrote to me:
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?
A valid point. For a tunnel to function you do indeed need a
working IPv4 connection. So what is the use of the tunnel anyway?
1) You still have fully flegded IPv4 from your provider but not
everywone else in the world is that lucky. The number of people that have
to make do with a so called CGNAT IPv4 address is rising. CGNAT is a
technology used by providers to have many customers share a single public IPV4
address. It is similar to NAT on your own LAN where a single IPv4 adress
is used by many devices on your LAN. With the difference that there
is no port forwarding available for the customer. Those who`s provider
uses this technology to deal with the shortage of iPv4 adresses can only
run servers that are accessable via IPv6. To connect to those servers
you need IPv6 and if your provider does not support native IPv6, you
can make use of a tunnel. This has not yet have a great effect on
Fidonet, but the number of sysops confronted with CGANAT is rising.
2) You can use a tunnel to experiment with IPv6 and prepare for
the day in the near or not so near future that installing IPv6 will
be unavoidable.
3) To put pressure on your ISP. If the provider sees that his
costomers are using tunnels to connect via IPv6 with the rest of the world
they may wake up. In any case it is a counter argument to what
providers dragging their feet often use: there is no demand for IPv6 from
our customeres.
4) And last but not least; what happened to that pioneer spirit
that made Fidonet sysops try out and help further develop new
technologies?
Hope this helps.
Cheers, Michiel
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