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.
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.
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.
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.
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 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.
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…
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.
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.
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.
More than 90% of the desktop computers are running windows and as everyone knows windows by itself is not a secure operating system.
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.
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.
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 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.
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!
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.
Graphics explaining what is Recursive DNS Query and how DNS Amplification Attacks work.
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
photos of major installation sequence and some problems encountered during installation of windows xp in macbook pro
Review of the book with links to tools, softwares and books recommended for time management for system administrators.
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.
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