How to store 50000 mails in 10MB to fight Spammers

5 minute read Published:

How to defend against junk mail in modern times

For those who do not allow their mails being read by a large cloud provider, fighting junk mail is an endless task. And, many people developed various – sometimes really clever – techniques to mitigate it. Though, current spam filters are typically time-consuming to configure, consume immense resources (or deliberatly do not use all available information), and are complex in maintenance.

This text is about Sisyphus, a novel filter that automatically learns all (!) your mails’ content to effectively fight off junk, is easy to deploy (one binary), and just needs one line of config, the location of your mail directory.

Harddisk Encryption with Geli

4 minute read Published:

How to encrypt a volume with Geli on FreeBSD and ZFS.

This is a tutorial to guide you through the setup of a fully encrypted laptop with FreeBSD, Geli, and a separate boot/key flash drive.


1 minute read Published:

Bapu VM manager

Bapu provides a graphical interface to manage your virtual machines on Gandi.

Checksum a DVD

1 minute read Published:

How to checksum a DVD, for example an installer DVD of an operating system.

Sometimes you get a DVD that you would like to checksum. For example one to install a new operating system.

Poor Man's SSH

1 minute read Published:

Secure Shell without SSH

A poor man’s alternative to using SSH is to combine socat with spiped.