Hi.
I was trying to post at #19918 ticket but I'm getting "potential spam" errors.
I'm kindly asking the developers: Please do maintain Miredo.
It is not about getting to IPv6 internet. It is because using it is the only way to receive inbound connections at places where all you got is a (CG-)NATed IPv4 internet access. This scenario is becoming increasingly common due to IPv4 pool exhaustion. I know that native IPv6 everywhere and for everyone is the “right” solution but it is often not in control of the user.
If the ISP is only providing CG-NAT and no v6 Miredo is your only resort that doesn’t rely on redirecting all traffic through an intermediate host on the internet which could be very slow. This is possible because teredo client-to-client connections are not relayed if symmetric type NAT is not involved. It creates a fast direct v4-to-v4 tunnel that finds its way through several layers of NAT.
Having a dynamic teredo address for receiving inbound connections is not a problem since there are many free DDNS services that can do AAAA records.
I have successfully used teredo(windows)-to-teredo(miredo) to start SSH and even OpenVPN sessions towards an OpenWrt router that is behind CG-NAT. The way I achieved this with Chaos Calmer was by installing miredo-common and miredo-client packages from the oldpackages feed from Barrier Breaker but I'm afraid it might not work with future releases if it is not being actively maintained.
I consider miredo-client a very powerful tool and wish to see it working until the day that every piece of network equipment that cannot route IPv6 end up in a garbage can.
André L.