Firewall failover without losing stateful connection tracking
Archive of posts tagged IPv6
IPv6 address normalization
Do not reinvent the wheel.
IPv4 to IPv6 communication (and viceversa): some kludges
The humble SSH saves the day (again).
Quick and dirty IPv6 with 6to4
Get IPv6 here and now. Even if your ISP does not support it.
iptables debugging
Using the raw table with the TRACE target