Scientific Linux 6.0 - A treat to scientific community.

Scientific Linux (SL) 6.0 produced by Fermi National Accelerator Laboratory and the European Organization for Nuclear Research (CERN). It is the latest release of a Red Hat-based distribution specifically developed to meet the needs of the scientific computing community. This release is based on Red Hat Enterprise Linux (RHEL) 6.0 like CentOS, compiled from source.

REMnux : Distro for Malware Analyst

REMnux is another pentesting OS that you would like to have in your arsenal. Basically, it aids investigating malwares, so it's a very handy OS for malware analysts for reverse engineering malicious piece of software. The distribution is based on Ubuntu. Along with analysing malwares, it can also assist analyzing IRC bots, network monitoring, javascript deobfuscation, analyzing shellcode, memory forensics etc.

Understanding VIM : Beginner's Tutorial-2

Cont. from previous post.
Here we are going to know about copying/pasting & searching in vim editor. Let's open a file, created previously.
Now, we want to search 'gofer'. If you are not inside command mode, type [esc]. Now, type /gofer & enter. If you want to highlight next appearance of gofer, hit n. If you want to highlight previous appearance of gofer, hit N.

Understanding VIM : Beginner's Tutorial-1

Vim editor takes some time to settle within the working arena  of professionals. It's a cake walk when people use it for atleast a week.
There are three modes in vim - insert mode, command mode, and last-line mode.
Insert mode is meant for inserting text, press i for start mode. Command mode is used for executing formating texts. Last-line mode is used for executing extended commands for text formating.
Start Vim by typing vim /vi .

Enhance Linuxbox Security : Iptables Printer Rules to Limit Access to Local LAN.

Assume a topology of a local LAN connected to the internet through a gateway in which you are configuring Iptables firewall. This gateway is attached to a printer & running a print server. The LAN belongs to 192.168.1.0/24 ip range. We want to limit the access of printer within the local LAN & bar the printer access from the outside internet. See figure.

Enhance Linuxbox Security : Creating a Custom Chain in Iptables

Read this post before proceeding as it contains simple basic firewall configuration file.
We can customize the flow of rules in iptables by creating new custom chains. The flow of rules in iptables follows the sequence of their execution.