Posts Tagged ‘6to4’

Playing with IPv6

Wednesday, March 9th, 2011

Running a rural based private network behind not one, but two NAT gateways and the impending IPv4 address exhaustion have led me tinkering with IPv6. We need outside access to at least one machine on that network. I’ve have been experimenting with Hurricane Electric tunnels and 6to4. So far both seem to work fine over one NAT but we had some problems with the he.net tunnels over two NAT gateways and I’m currently giving 6to4 a try. It’s trivial to set up. Here’s a nice article explaining how to do it on Debian based Linux systems. Yes, that includes Ubuntu. If you’re behind NAT, specify your private IPv4 address as the local endpoint.

Update: 6to4 works fine over one NAT but seemingly not over two of them. The he.net tunnel sometimes works, but most of the time it doesn’t, so I applied for a SixXS account to try out AYIYA. This approach tunnels IPv6 into layer 4 protocols such as UDP or TCP.