Latest Posts

Simple advice for securing your home wireless LAN

When I wrote this previous blog "Hack most wireless LANs in minutes!" which mostly focused on insecure corporate wireless LANs, it seemed to generate more questions than answers which is typical every time I go in to this topic.

March 14, 2005 by George Ou

19 Comments

The great open source VoIP debate

Two weeks ago at the Internet Telephony Conference & Expo in Miami, I had the pleasure of moderating the open source and telephony roundtable discussion with some of the key players in the business. The panel included Mark Spencer, creator of Asterisk and CEO of Digium; Bill Rich, CEO of Pingtel; and Alan Hawrylyshen, CTO of Jasomi Networks.

March 8, 2005 by George Ou

2 Comments

The most dangerous email attachments aren't for humans

We like to poke fun at people who continue to foolishly click on those e-mail attachments that keep infecting them over and over again. The last thing you would expect are security products -- designed to protect us from infected email in the first place --that foolishly open up e-mail attachments that can infect them.

March 3, 2005 by George Ou

11 Comments

Scalix potentially a serious contender to Exchange

After reading David Berlind's blog and listening to his podcast about a potential contender to Microsoft Exchange server, Scalix sounded almost too good to be true. As someone who's overseen and designed many Microsoft Exchange installations with hundreds or thousands of users, I have always been haunted by several issues related to any Exchange contender.

February 27, 2005 by George Ou

23 Comments

Is Scalix a contender or pretender for Microsoft Exchange?

David Berlind posted this interesting blog on an Exchange server and Outlook client alternative from the company Scalix. Since Microsoft avoided going to aSQLdatabase backend with their soon to be released Exchange 2005, this leaves the door open for a more scalable challenger.

February 16, 2005 by George Ou

12 Comments

The reality of Grid computing

David Berlind did this excellent interview with Wolfgang Gentzsch, who is one of the pioneers of grid technology,anddispels some of the myths of grid computing. In the past, I've tried to dispel some of the grid mystique myself but it's been a challenge to get the point across.

February 13, 2005 by George Ou

4 Comments

Understanding the priorities in cryptography

In recent news on Quantum cryptography, a company is pushing Quantum cryptography into the mainstream. Without judging the particular company, Cavium, or the merit of their products, I will say that people in general have huge misconceptions about cryptography and they need to be aware of them when theyevaluate security products.

February 7, 2005 by George Ou

5 Comments

Is the fear of the monoculture genuine?

I have a very simple question forthose who either propagate or agree with the concept that monoculture is dangerous. If an organization was running all Linux on their desktops and servers, would you tell them that they have a big monoculture problem and they should immediately convert half of their desktops and servers to Windows XP and Windows 2003 in the name of cyber diversity?

February 3, 2005 by George Ou

49 Comments

Better VPN survivability needed for VoIP

In a recent story on a McDonald's pilot project that leverages DSL, the public Internet, and VoIP,thefast food chainseeks to gain efficiency by consolidating drive-through order takers to a centralized call center. Based on the results, the project illustrates why the "IP" in VoIP still stands more for "Internet Protocol" and not the "public Internet" as far as serious business telephony deployments are concerned.

January 31, 2005 by George Ou

5 Comments