IT Security & Network Engineering Knowledge Base

Practical documentation and technical guides on network security, firewalls, Linux systems, monitoring, and automation.
We feature technical articles across the entire IT spectrum - Built from real-world experience and continuously updated.

How to enable SDM on your router

SDM (Security Device Manager) allows you to configure and manage your router via the use of a GUI. Please find the steps below : Download the SDM-Vxx.zip file from Cisco’s website. Ensure that you have the sdmconfig*.cfg file within your routers flash for your version of router. You can confirm this by using the command … Read more

Build a Samba Server on Redhat / CentOS

Below shows you the basic steps in order to configure your Linux Redhat / CentOS server as a Samba server. Install and Configure yum install samba -ychkconfig –level 123 smb on cd /etc/sambamv smb.conf smb.conf.backupvi smb.confcat > /etc/samba/smb.conf [paste the text below][global]workgroup = Workgroupnetbios name = SambaServerserver string = Samba Server %vlog file = /var/log/samba/log.%mencrypt … Read more

How to set the Time / Date and Timezone in CentOS

In this article we will show you how to set the time, date and timezone within CentOS. Though I’m sure this method will remain the same through the various Linux distributions. Steps Set the time zone Set the time and date Sync the hwclock with the current time and date Commands Below are the commands … Read more

How to install SSH on Solaris 10 x86

This guide will show you how to install SSH on Solaris 10 x86 from the Solaris installation DVD. Mount CD If you havent enabled the feature that will automatically mount your CDROM drive you will need to mount it using the following commands : mkdir /cdrom Find the name of your cdrom -bash-3.00# iostat -En … Read more

ESX4: Turn on/off Virtual Machine using Command Line

Using the vmware-cmd command you can perform a number of actions on your Virtual Machines from the command line. Below shows you some of the functions you can perform : List Virtual Machines [root@ESX4 ~]# vmware-cmd -l /vmfs/volumes/4c16a0ec-2c7ebe2a-6ad5-0011s8azz71c/OpenSolaris 2009.06/OpenSolaris 2009.06.vmx /vmfs/volumes/4c16a0ec-2c7ebe2a-6ad5-0011s8azz71c/CentOS 5 – Oracle/CentOS 5 – Oracle.vmx /vmfs/volumes/4c16a0ec-2c7ebe2a-6ad5-0011s8azz71c/CentOS 5a/CentOS 5a.vmx Turn On Virtual Machine Below … Read more

How to create a CS-MARS Inspection Rule

Within CS-MARS there are 2 types of rules. Inspection Rules and Drop Rules. Inspection Rules allow you to trigger events based on certain triggers such as keywords, source, destination etc. Drop rule is an exception rule which MARS uses to ignore a behaviour that would otherwise trigger an event. In this example we will configure … Read more

Adaptec Storage Manager Script for ESX4

This article shows you how to script and alert (via email) for when any of your RAID disks show as offline or your Logical Drive is not showing as optimal. In order to obtain all the stats about your Adaptec RAID card from your ESX box you can install the asm (adaptec storage manager) rpm … Read more

What are horizontal or vertical scans ?

Horizontal Scan A horizontal scan is described as scan against a group of IPs for a single port. Vertical Scan A vertical scan is described as a single IP being scanned for multiple ports. Box Scanning A combination of both vertical and horizontal scans.

How do I set the hostname on CentOS ?

In order to set the hostname on CentOS you will need to change the HOSTNAME section within /etc/sysconfig/network Your hostname will now be updated once you logout and then back in. Its also worth noting that this will survive reboots.