This document will explain howto set up an IPSec encrypted GRE tunnel on OpenBSD. In the document, both end points are OpenBSD 4.1 systems, however it should be fairly straight forward to implement on other systems.
To start, I would advise disabling pf on gre0 and enc0 until you have the encrypted tunnel working, this […]

A: Beyond simply editing /etc/group with your favorite text editor, adding a user to the wheel group can be achieved in a few different ways.
To place a user in the wheel account when her account is first created, you would run

$ sudo useradd -G wheel jdoe

 
Note: The above also creates the […]

A: This question came to us in response to the article Backup Files and Partitions with dd and netcat.
Encrypting these files transfers is quite simple.
As in the previous article, we will setup the server to listen on port 9999 and redirect output to “backup.file”

server# nc -l -p 9999 | \\
[…]