SSH Key Authentication

Linux based tutorial on SSH Key Generation for authentication.

PF - Extended Introduction

The talk will introduce packet filter (pf) - a *BSD firewall system - and summarize its history and projected future. After providing a short overview of pf's general functionality and some firewall basics, it will concentrate on packet filter's advanced feature-set from the administrator's point of view. The talk will also cover the integration of ALTQ, a mature framework for traffic shaping and priorization. Finally it will provide a short overview of the "Common Address Redundancy Protocol" (CARP) and its integration in pf.

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John the Ripper

Tutorial how to use John the Riper in Linux.

Allowing Web Access in SELinux using chcon

If you have experienced 403 errors with a RedHat-based distro such as CentOS or Fedora, you may be encountering Type Enforcement issues. This video illustrates one way they commonly originate and how to gain access when you're being forbidden.

What happens here:

• user logs in to root (su or sudo preferred)
• creates new user to generate home directory
• creates index file in home directory
• locates httpd.conf file
• modifies VirtualHost entry to redirect requests
• restarts apache
• loads page, receives 403
• sets chmod and chown values to be less restrictive (unnecessary)
• reloads page to same 403 forbidden error
• views security context with "ls -Z"
• changes security context type with "chcon -T"
• reloads and displays index page successfully

Consult the tutorial at intarwebz.com for more specific details.

Getting Windows passwords

This is tutorial on cracking the sam key using Linux Ubuntu and Sam Inside.

FreeBSD: Hard disk encryption

How to protect your data on FreeBSD machine even when your computer is turned off? This hard disk encryption guide will help.

Linux: Introduction to BackTrack

Introduction to well known security LiveCD distribution - Backtrack. Download video (AVI, 16 Mb).