Firewalls have become an integral part of all corporate networks. They’re the first line of defense against attacks from outside network (Internet) and also the point of control to make sure internal users (employees) are using the Internet as they’re supposed to. Recently the UTM (United Threat Management) Firewalls have become very popular. They’ve built [...]
Tunneling is a technology used to connect different computers and networks securely across the Internet. There’s a great introduction to Tunneling and it’s uses at Networking 101: Understanding Tunneling A tunnel is a mechanism used to ship a foreign protocol across a network that normally wouldn’t support it. Tunneling protocols allow you to use, for [...]
Marius Ducea has a great article on How to restore a hacked Linux Server. He provides a very practical baseline on how you should develop your own plan of action to restore a hacked Linux Server. These are the steps he recommends: – Don’t panic. Keep your calm and develop a plan of actions- Disconnect [...]
With perfect password manager, I thought I had the complete set of tools in my Mac for getting things done. But today I realized, I’d overlooked ethereal. I use it sometimes and it’s a gem without which it would be very difficult to solve some network problems. Ethereal is a free and open source packet [...]
I’ve switched to a Mac and it took quite some time for me to find an ideal password management tool. Of course OS X has an excellent KeyChain Access for password and other confidential information management. Also there are some third party softwares, but most of them are good for personal usage only (by single [...]
I’ve been using PowerBook G4 as my production laptop for about a month. There had been some odd moments but overall it’s been a wonderful experience and definitely there’s no looking back. I’m glad that I’ve switched. Now my laptop boots faster, everything looks more beautiful, I can do everything I’d been doing and I [...]
Basic journey of a packet is an excellent article for anyone who’s curious about how things actually work in the Internet, specially for new network and system admins. The author has done a very good job in explaining how a packet travels across the Internet. He provides a simple example of what happens when a [...]
I know too well what the Great Firewall of China does. It blocks web sites containing banned words like “Falun Gong” and resets connections with your email servers if your email message contains similar banned words. Once I’d captured TCP packets with Ethereal and found that TCP reset packets were injected to both the server [...]
After being Spammed and Attacked, Blue Security has shut down its anit-spam service. According to the Netcraft’s Performance Chart Blue Security’s web site was unavailable for an extended period on Sunday and Monday, and again this morning. The founder of Blue Security says it has shut down its anti-spam service, citing the impact of powerful [...]
Today I attended a seminar called Workplace IT Security & Communications Solutions for Today’s Business organized by one of our technology partner. It was an interesting event where several networking vendors presented about the IT Security Technology and the latest and greatest products they’ve in offer. Opening speech was given by the Senior Inspector WONG [...]
