>/And these addresses are normally included with
your internet service
for free. /
One thing to note however is that in many cases, any
ports or protocols
blocked by the ISP on IPv4 are also blocked on IPv6. This is what makes
getting a block from a tunnel broker beneficial.
Of course you will not need to have some unusual protocol like IPIP operational over
that IPv6 connection, and usually the plain TCP and UDP ports can be opened without
problem so it should be possible to run the usual services.
A tunnel broker introduces an additional dependency and additional weird routing, so
when people complain that using some VPN servers across the world instead of a tunnel
mesh is objectionable, they certainly should not use an IPv6 tunnel broker!
Rob