How to access partitions for which there's no device
Archive of posts filed under the worksforme category.
Munin traffic accounting with iptables
Get graphs for specific protocol, ports, or IP address
Quick and dirty IPv6 with 6to4
Get IPv6 here and now. Even if your ISP does not support it.
OpenVPN’s built-in packet filter
Control client-to-client connections in bridged mode (and more).
iptables debugging
Using the raw table with the TRACE target