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(Continued from Page 1)
Do you remember the two clients of mine recently hit by that devastating
computer virus?
These two clients are very, very similar. They are both small
companies, located in the same county, and rely heavily on PCs
for day-to-day operations.
Both clients use the same ISP, and both clients run the same
anti-virus software.
But there was one big difference. One company lost two days of revenue while
the other kept working. Remember what made the difference?
Knowledge.
Here it comes...
Technology
Secret #1
Email Viruses Are AVOIDABLE,
Even WITHOUT Virus Protection
Let me explain what I mean.
Any company can be hit with a virus. To be safe, you must avoid
infection. You must recognize and remove the virus before it is
triggered. But how can you tell if a virus or Trojan
horse passed your firewall...? (Click HERE
to learn more about firewalls.)
Here's a REAL problem.
When you receive a virus as an email attachment, you can't spot it.
It could be any sort of file because you can't see the file extension.
(The last three letters after the dot in the file name. Like readme.txt -- the .txt is the extension.)
File extensions are HIDDEN by Microsoft!
Here's another problem. Some users don't know the difference
between a dangerous file and a safe file...even when they can see the
extension. Files named Aunt-Jane.jpg and
Aunt-Jane.bat are the same thing to them...but boy are they different!
One file is a 'safe' file, a graphic image file. The other
is DANGEROUS. It is an MS-DOS batch file. And by clicking on
it, you give full permission for the batch file to go out and do whatever it
wants to on your computer. Potential disaster!
Technology
Secret #2
YOU CAN AVOID All Email
Infections
KNOWLEDGE is the key. And here's what you need to know. The
table below is a list of file extensions. One column shows extensions
that are potentially dangerous, the other column lists extensions that are
safe. (Remember that we are just talking about the file extension.)
|
Common Safe Files |
Potentially Dangerous Files |
|
|
|
|
| Graphics files
|
.jpg .gif .dwg .tif . tiff .pict |
.exe |
Executable files |
| |
.vsd .eps .png .bmp .wmf |
.bat |
MS-DOS batch files |
| |
|
.vbs |
Visual Basic Script |
| Text files |
.doc, .txt .rtf |
.cmd .com |
Command files |
| |
|
.js |
JavaScript |
| |
Most others not listed |
.scr |
Screen Saver file |
| |
in the other column |
.pif |
Program Information
File |
| |
are safe, too. |
.dll |
Dynamic Link
Libraries |
| |
|
.msi |
Microsoft Installer
file |
| |
|
.zip |
WinZip Compressed
file |
Quiz time. Is this a safe file, or a dangerous file:
dreamy.txt.pif? The extension is .pif...which makes it DANGEROUS.
Don't get fooled by a "double extension." It's a common trick hackers
use...because it works. Don't YOU get caught!
Do you see how easy this is? Don't click on potentially dangerous
files -- even if they are from someone you know. Now, if someone
has written you a personal note that you are CERTAIN is genuine, go ahead an
open it.
But if you're not absolutely sure, write them back and ask, "Hey, I
just got his thing from you. Did you send it to me?" I've done
that dozens of times because friends had opened up a virus and the virus
spread. Usually I don't hear back from them for a few days because
their PC was wrecked so badly.
Put YOUR protection in place. Give us a ring to ensure your
staff comprehends what is SAFE and what is DANGEROUS. Ask for our
pre-written training guides for your staff. Master this
secret before someone in your company accidentally wipes you out. Our
number is (302) 999-1899.
Technology
Secret #3
Virus Protection Software Is
NEVER Up-To-Date
Did you know this -- your Virus Protection software only protects you from old viruses?
That's right. A newly released virus will go UNDETECTED straight
through your anti-virus software because its "signature" isn't
recognized.
YOU are the only protection when a new virus is released. By
being on-the-ball you'll recognize potential viruses when they arrive in
your email.
You won't click on them and give them permission to do whatever they want!
Make sure all your people
are trained to AVOID virus infection. Call to sign-up.
Technology
Secret #4
REVEALING Hidden Extensions
You can't tell WHAT a file is...unless you change Microsoft's settings
for Windows Explorer. The default setting HIDES FILE EXTENSIONS!
Fix it like this. For Windows 95 and 98 PCs, open Windows
Explorer, go to View > Options. DESELECT "Hide files of these types"
and "Hide MS-DOS file extensions for file types that are registered."
For Windows NT / 2000 / XP, open Explorer, go to Tools > Folder Options >
View and DESELECT "Hide extensions for known file types."
Pay attention to file extensions! You have now revealed the
extensions, make sure you evaluate them. Grasp the importance of each
extension. Before long, a virus file will become obvious to you.
What is your strategy? Let's implement a plan to master these
skills throughout your whole company. Call us at (302)
999-1899 today. (Thank you.)
Click HERE to get to the Home page.
Copyright
© 2003 Stephen Worden's IT Survival Guide™ / Illuminova, Inc.
All rights reserved. |