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Windows SecurityBecause many of you have bookmarked my Web site or otherwise saved my address somewhere on your system, when one of you gets a computer virus it either sends me a copy of the virus (as well as everybody else whose address it can find on your computer) or it uses my address on the “From” line on all of the infected mail that it sends out from your computer. Though many people are aware that the “From” line is spoofed on virus mail, many new users are not, and I get angry mail in response. At the height of the recent SoBig.F virus attack, I was getting 30-50 emails per hour with my email being shut down completely by the server every night because I had exceeded my quota (10 MB) when I could not empty the box (I dont want the computer connected to the Internet when Im asleep). I have a message rule that deletes most of this mail from the server, but it wont do it until I check the mail (and apply the rule).Recently, I have also been the victim of numerous spam mailers spoofing my domain and regularly get several hundred User Unknown returned emails from AOL. I just hope AOL doesnt block my domain. If so, those of you using AOL wont be able to get legitimate mail from me. I can assure you that the spam did not originate from arraich.com—I dont sell Viagra or offer body part enlargement. The header data on the mail will show that it did not come from me. All of this is depressing, discouraging and sometimes downright stressful for me. The SoBig.F virus was a marathon. The next one will probably be even worse. Which brings me to the purpose of this page. Can you all take a minute and consider using the following security steps on your computer? Please note that I am not an expert at Windows security. These are very basic, commonly recommended steps that you can take to limit the vulnerability of your system. |
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If you are using Outlook
Express, go to View > Layout and uncheck (deselect) the Show Preview
Pane checkbox. When that is deselected, you will have to double-click on
an email for it to open. It will not automatically open when you click on
it. This allows you to delete mail without opening it. After you have done that, I know many of you are someday going to get mail that you think might be something you want to open, but youre not sure. To see what is in an email without opening it, right-click on the mail (dont double-click). From the menu that appears, choose Properties. In the Properties dialog, click on the Details tab at the top of the box. In the Details dialog, click on the Message Source button. Once the message source is showing, drag on the lower right corner of the box to expand its window and scroll to find the message text, if any. This is also where you can see the message header that I mentioned above, showing the route and source of the mail (though spammers use many tricks to obscure their true source). Youll have to scroll down quite a bit to get past the headers and find the email body text. If there is no text from someone you know, then its not something you want to open. Close the source window and the properties window and delete the mail. The above procedure applies also to all mail (including that from people you know) that has an attachment. Mail with an attachment will show a little paperclip icon to the left of the emails name in your Inbox. Never, ever open mail with an attachment until you are sure that it is legitimate. This means checking the text contents of that mail using the method described above, and if in any doubt, emailing the sender to have them verify that they have sent an attachment and that it is clean, and virus-free. Remember, viruses are likely to come as an attachment from someone you know (and trust). Only open any attachment if you are expecting an attached file from them. |
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If you want to avoid the possibility of getting a virus via attachment
(you may have small children using your computer and they like to open
everything) you might want to make a message rule that either deletes
all messages over a particular size (most, though not all, viruses are
more than 28 kb in size). Or you can simply delete all messages with any
attachment from the server. The disadvantage of the latter is that when
one of your own email is bounced due to a typo in the address you used
or any other reason, the returned mail contains an attachment. If you
delete that from the server, you wont know that your mail did not
go through. If you ever get any email from anybody, including (what looks like) your bank, your ISP (for example, AOL), or any other institution (eBay, or PayPal for example), asking for (or demanding) your password, your social security number, your account number or any other personal information, do not respond or click any links embedded in the email. Do not save or open any files attached to such email. There are many very convincing ways to make an email, and a linked Web site appear to be genuine when in fact, they are not. If you feel the email may be genuine, telephone the place of business, or open your browser and go there directly by entering the appropriate URL into the browser. Do not respond to the email or click on any links within that email. |
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The Blaster worm that infected so many computers in 2003 did not arrive
via email. If your computer was connected to the Internet, not patched
(Microsoft had issued the patch a month earlier), and not behind a firewall
you almost certainly got hit (infected). [Update/Warning: as of August, 2005, the latest release of the paid version of Zone Alarm, Zone Alarm Pro (which I use), is a total disaster. I do NOT recommend getting or using it. I believe the free version is still good, but the new build of Zone Alarm Pro is a complete disaster. Check the forums at the Zone Labs web site for details and (hopefully) future improvements.] When you install new software on your computer, make sure you turn off ZoneAlarm and any virus protection software that you are running before installation. And then be sure and turn both back on after the install. To turn ZoneAlarm off, right-click it in the sys tray and choose Shutdown ZoneAlarm. To turn it back on, find ZoneAlarm in your Programs list. It also is always on after a reboot. In addition to the above, I do two more things to limit my systems
exposure to intruders. I dont believe Windows 98, Windows ME users
have this option (not sure about XP Home), but Windows 2000 and Windows
XP Pro users can make new accounts with limited rights/access to the system.
I always log on a limited User when I am connecting to the Internet. Limited
users cant do much of anything, in particular, they cant install
anything. Some of the Microsoft updates require administrative rights
to install, so in those rare instances, I will log on and connect as Administrator,
but at all other times (and I mean all other times) I log on
with the limited User account before connecting to the Internet. Possibly a more sensible solution to trying to secure Internet Explorer, is to use another browser. Mozilla (Firefox) is highly recommended by many users (mozilla.org). An alternative to all of the above, albeit an extreme one, is to swap your PC for a Mac. OS X (currently Panther) is considered a much more secure OS than Windows. In addition, virus writers rarely bother to attack Macs. If you share your computer with young children or parents who are not computer-savvy, this could be the best option for you. Your Elements 2 CD comes with both the PC and Mac versions (but most of your other software probably does not). Elements 3 only works on one or the other (whichever you buy). I hope this advice helps you keep your computer secure. Remember to keep up with all of the Microsoft security updates, dont open any email attachments, and get a personal firewall such as ZoneAlarm. |
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