Archives for the ‘Network Security’ Category

How To: Configure IPSec with Sonicwall

By Jamsi • Oct 23rd, 2008 • Category: Linux, Network Security

A few months ago, I had the pleasure of installing and configuring a VPN link between an outdated Linux box and a Sonicwall TZ170. Oh the joys I had in getting this to work ..
The Sonicwall device was located in a data center, whilst the Linux machine was located in an office protecting a 192.168.0.0/24 [...]



Dan Kaminsky’s DNS exploit released

By Jamsi • Jul 24th, 2008 • Category: Network Security

A few weeks ago, Dan Kaminsky published information about a flaw in the DNS protocol that could allow attackers to compromise DNS records.



Preconceptions About Network Security

By Jamsi • Jun 5th, 2008 • Category: Lead Story, Network Security

A common preconception about network security is that as long as the firewall is working and preventing all unauthorized access to internal devices (that’s incoming traffic) - then the firewall is doing its job. However this often isn’t the case and a number of recent attacks have proved this. This misconception is held amongst many sys admins and their IT managers, who often turn their back on security news with the idea that they have a firewall; they are protected.



Rootkit Detection and Removal

By Jamsi • Jun 1st, 2008 • Category: Feature Posts, Network Security

The other day I noticed something weird when I performed the command “ls -l”. Bash was reporting some strange output and the first thing I did was throw it into Google…. which revealed one thing; my Linux box had been comprised. Freaked out at first, I started researching everything I could; I was already aware [...]