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in this issue:
real time anti-virus, anti-spyware and anti-trojan software
learnt about or been using Clamwin, an open-source anti-virus to
protect you computer. The shortcoming of Clamwin is that it does not
provide real time protection.
Now, there is
another open-source software called : Winpooch.
It provides real time
scaning on the running process activities to prevent spywares and
from installing. When working in conjuction with Clamwin, it can also
provides real time virus scanning.
Try them out to
protect your computer with no cost.
by Alan Au
study - How
Cyberlab solves a wireless LAN connectivity problem
54M Wireless LAN in one of Cyberlab classrooms, with one normal home
wireless access point and 30 USB wirelss adapters. There have been some
reports from the students that they could not connect to
network. Usually, this happens to about 10 or so computers and it is
very difficult to get them connect back.
We have tried to
swtich to other wireless
channels, upgrade the
firmware of the wireless access point. Apparently, it became better
just afterwards but actually the problem wasn't fixed. Until recently,
we have got one more wireless access point and deployed it to that
classroom. We assign half of the computers to each access
Now, the problem is really fixed, although occasionally, one or two
students might report connectivity problem but it can be easily fixed.
have tried to find out the maximum or recommended no. of clients that
our current AP can support but there is no such information from the
vendor website. While I can find some figures for Cisco
Aironet AP and Aruba AP
For Cisco Aironet AP, max = 2048, recommeded = 24. For Aruba AP, max =
255, reoommeded = 24. So, before you deploy Wireless LAN in the future,
you should find out the recommended no. of clients first.
flaw in wireless VoIP handsets endangers the enterprise
enterprise-grade authentication is the most secure and robust secuirty
mechanism in user authentication for wired and wireless network. Many
wirelss VoIP phone handsets implement 802.1x/EAP.
But, according to an article from ZDNet, it is
found that a few implementations of them posses a security
It is because that
these implementations have
simplified the 802.1x/EAP
authentication process - Bypassing the Authentication server
certificate verification process at the client side. This speeds up the
authentication process but introduces a security risk of being easily
for the hackers to reveal the user' s passwords.
To read the details and the countermeasure, please read this ZDNet
automated software deployment
solution for Windows
encountered the need to deploy same
files to a lot of PCs in the same time with the same configuration? The
stupidest way was to do it one by one. It
would be a waste of your
resources. In general, system administrator would add all PCs to Active
Directory and complete by windows deployment tool and Group Policy. But
when your software is not in msi. What would you do?
enables you to implement an automated software deployment solution
without restriction. It can install MSI, InstallShield,
PackagefortheWeb, Inno Setup, Nullsoft and other software installers.
In fact, we are
using WPKG in some classrooms at
Cyber Lab. It helps to reduce a large amount of manpower.
For more detial,
please see WPKG
is a powerful, open source relational database system. It
runs on all major operating systems, including Linux, UNIX (AIX,
BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. It is
fully ACID compliant, has full support for foreign keys, joins, views,
and stored procedures (in multiple languages).
PostgreSQL released its 8.3 version.
As mentioned on news.com, PostgreSQL has improved performance from 5
percent to 30 percent.
There were a lot of new
functionalities and performance enhancements. The following list would
show some major features:
- Full text search
is integrated into the core
for the SQL/XML standard, including new operators and an XML data type
- Updatable cursors
re-plan cached queries when table
definitions change or statistics are updated
improvements in logging and statistics
- Support Security
Service Provider Interface
(SSPI) for authentication on Windows
For more details, please see Posgre
courses for network administrators
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