6to4 and Reverse DNS
6to4 is a popular IPv4-to-IPv6 transition mechanism. It works by tunneling IPv6 over IPv4. It's useful for connecting an IPv6 "island" to the IPv6 internet if you don't have IPv6 connectivity. For example, the Apple Airport Extreme supports 6to4: You can use IPv6 in your home even if your ISP only gives you IPv4.
Due to the distributed nature of 6to4, no one has quite figured out how to make reverse DNS work. Until now.
Yesterday, the IETF approved RFC 5158, which specifies how reverse DNS should be handled for 6to4 islands. As RFCs go, it's pretty readable. In short, you go to https://6to4.nro.net/ from a client inside your 6to4 island and register your DNS servers.
I run 6to4 at home, so I'm interested in this. I just need to scrounge up two machines to use as servers.
Due to the distributed nature of 6to4, no one has quite figured out how to make reverse DNS work. Until now.
Yesterday, the IETF approved RFC 5158, which specifies how reverse DNS should be handled for 6to4 islands. As RFCs go, it's pretty readable. In short, you go to https://6to4.nro.net/ from a client inside your 6to4 island and register your DNS servers.
I run 6to4 at home, so I'm interested in this. I just need to scrounge up two machines to use as servers.
0 TrackBacks
Listed below are links to blogs that reference this entry: 6to4 and Reverse DNS.
TrackBack URL for this entry: https://blogs.psu.edu/mt4/mt-tb.cgi/5412
Might I suggest: http://puck.nether.net/dns as a DNS option, you can simply have him secondary from your primary... now you only need 1 server.
-Chris
Good to know. I think I am going to setup my own so that they are reachable over IPv6. It doesn't look like puck.nether.net has IPv6. Thanks for the link, though.
I have yet to find a way how to update my home LAN reverse zone on my nameserver, update record with NRO and rewrite all forward v6 records when ADSL bounces and gives me a new public v4 address. It doesn't happen often, so it's a manual process for now but I'll probably write up a script for all the above tasks to be run from ppp/ip-up sooner or later.
That really isn't news. I've used 6to4.nro.net since they came online in 2004 (until I ceased using 6to4 this year, 2008).