Monitor network traffic with ntop

ntop is an excellent free tool to monitor network traffic. It lets you zoom into individual networks and hosts, and gives you enough information to pinpoint the misbehaving hosts or devices generating extra/abnormal traffic. E.g.

Online Password Managers

How about storing your secrets and passwords online, somewhere in the cloud? I know what your immediate response is, passwords? No way I'm going to store my passwords online! But you might want to give a second thought because now the technology is secure enough.

Simulating Cisco and Linux Networks

Free and open source Cisco Router, and Linux Server simulators let you test your network config before implementing it in the real world, without investing any money in expensive hardwares.

4 simple measures to keep your system and network secure

There are many things you can and should do to keep your system and network secure depending on your environment. But there're some basic foundation that everyone should follow. 4 things that are very simple yet effective in securing your systems and networks.

Free Web Hosting Management with Virtualmin

Virtualmin is a free and open-source virtual hosting management system designed to make virtual hosting quick, reliable, and secure. Similar to cPanel, with comparable features but free and open-source. Here's an installation guide with major features.

A picture is worth a thousand words

A collection of some of the most powerful images recently seen in the internet. It's worth a look..., there 's no doubt that a picture is worth a thousand words.

List of Blogging Checklists

There're some excellent checklists about blogging in the blogosphere, and this is the collection of some of the best. Enjoy the list of the checklists…

The Email Problem and Solutions

More than 90% of the emails are abusive. The email protocol (SMTP) was designed at a time when very few people were using emails and everyone basically knew each other.

Coca-Cola Singapore News protal hacked

After the Nokia's defacement it's Coca-Cola's turn. As of writing this entry, Coca-Cola Singapore is still defaced by crackers_child. This is the second time coca-cola Singapore's site has been hacked, first time it was hacked in 2003.

How much Spam and Virus does my mail server receive?

Wikipedia estimates that 80% to 85% of the incoming mail is "abusive email". I had a chance to check what percentage of email in one of our domains contain spam and virus.

Is it possible to secure your windows with free softwares?

More than 90% of the desktop computers are running windows and as everyone knows windows by itself is not a secure operating system.

OpenVPN Implementation

A step-by-step guide on how to install and configure the OpenVPN Server in Linux and Clients in Windows XP and Mac OSX. OpenVPN is implemented to access the internal office network (File Server, Database Server and Desktop PCs) securely from anywhere in the Internet.

OS X Applications for System and Network Administrators

The corporate world is full of windows, so a system and network admin cannot completely ignore windows. Anyway, if you're planning to switch to a Mac, the good news is that there're enough Mac application for productive system and network administration.

Ethereal on Mac OS X

A step by step guide on how to install Ethereal on Mac OS X. Ethereal is a free and open source packet sniffer application, used for network troubleshooting, analysis, software and protocol development, and education. It has all of the standard features of a protocol analyzer

Password Managers for OS X

Password Management softwares for Mac OS X. There's a choice for everyone -- some good for single user, some good for cross platform, some good for mobile users and some good for system admins.

Watch the World Cup Live Online - PPStream

www.ppstream.com streams many different channels online and CCTV-5 is one of them, which broadcasts World Cup Live. It is using P2P technology. The site and the player are in Chinese. Here's a guide on how to download, install and watch World Cup LIVE ONLINE!

Getting Started with Linux Commands

A guide to help beginners who're interested in getting started with Linux. This should give an overview of Linux and it's basic commands.

DNS Amplification Attack

Graphics explaining what is Recursive DNS Query and how DNS Amplification Attacks work.

What's next for the Intel Macs?

What's next for the Intel Macs? Since users have already taken the first step towards dual booting Intel Macs with Windows XP and Mac OSX, what will be the Apple's next move? Will it allow the users to install other OSes in it's hardware or make the life of dual/trio booters a

WinXP and OSX dual boot in MacBook Pro

photos of major installation sequence and some problems encountered during installation of windows xp in macbook pro

Time Management for System Administrators

Review of the book with links to tools, softwares and books recommended for time management for system administrators.

E-mail Server Installation Checklist

The checklist is useful for planning and looking at the bigger picture of an email server installation before plunging into the technical details of actual installation, configuration, testing and putting into production.

Why I started blogging?

What motivates blogging?

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Niranjan

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