Goodies to Go ™
January 28, 2001–Newsletter #165
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Editorial Goodies – SPAM Scam
I had intended to write on a
different topic this week but I
received a rather disturbing email responding to the my SPAM
article from Issue #163.
Here’s the email:
"On January 14, you did a great venting on spammers. There is
another scam out there that we just became a victim of…email
forgery. We have a small business website and they used the
address listed there. The "undeliverables" started coming in
droves. This surprised us since we don’t email from the site
–it’s a forward only address.
These people found open relay ports all over the world (I’m
have no clue what that actually means) but the bottom line is
that our domain is now on every blacklist known to man. These
folks were creative to the point of having movie load
immediately just by opening the email (now this is probably
standard but it was shock to me since I never open the junk
that gets through).
A couple of things that I found out–there’s almost no help
available in the U.S. Luckily our paper trail led to Canada;
email forgery was on the congressional plate before 9-11 it
is now on the back burner (understandably); the forgers look
for a name in the email addresses, they are not interested
in "info@domain.com"; they are targeting websites that don’t
appear to be big enough to have a legal staff; and if I ever
got my hands on them I would have no trouble inflicting cruel
and unusual punishment.
So for most average folks, all I gotta say is hide the email
addresses, check your undeliverables and there’s something
worse than spam!"
I was so amazed that people would stoop this low. Effectively,
they have killed this person’s domain. Since I had never heard
of this sort of thing happening to anyone, I thought it was
worth sharing with you.
I’m sure some of you are wondering what sort of problems something like this
would cause a site owner. Well, the first issue that you could possibly face is
losing your web host. If your site uses a hosting service it is likely they will
suspend your domain or even shut you down altogether.
If you get past the problems with your hosting service you will
still have to deal with your domain name being on every server’s
"black list" on the planet. If you don’t know what a server’s "black list"
entails, it is simply this; many ISP and domain email servers maintain a list of
spam domains that they use for
filtering known spammers. So, each time an email comes from a known spamming
domain it is automatically dumped into a trash heap.
A "black list" can be both good and bad. The benefits are obvious, having spam
filtered out before it even gets to you. The drawback can be that many domains
that you might actually want to get email from are being filtered too. One such
example is hotmail.com, a favorite of many spammers. I had a friend tell me the
other day that it took him several weeks to realize that his ISP was filtering
out all hotmail accounts. The realization hit him after he never seemed to get
any emails he forwarded to himself from his own hotmail account.
Once you get "black listed" there are little remedies available
to you. It would be impossible to email every mail server on the
planet to let them know you were hit by a spam scam. Besides, even if you could
email all of them the odds of anyone doing anything about it would be slim to
none.
Being that as it may, what’s the big deal? Well, if your domain
is a commercial site it can be a very big deal. Say one day someone scammed your
domain and it got "black listed". Now, after you get things squared away with
your web host, you get a half dozen emails requesting quotes for your services.
You respond to those emails but your domain name is on the "black list". Your
responses never get through. One of your main methods of business contact has
now been effectively destroyed.
So, how could you prevent this kind of theft? Well, that’s a tough one. There
really isn’t much you can do except maybe get another domain. You could use the
second domain name to forward all of your incoming mail. You would use it for
posting on your site and for advertising so that your real domain name never
appears anywhere. You would only use your real domain name when replying to
inquiries. While this is by no means a fool proof masking method, it could be
effective.
A better solution might be to urge your country’s lawmakers to pass laws that
would hang spam scammers like this by their finger nails.
Quiz Goodies
Let’s say you want to create a button
on your site that pops up a message box with your street address on it.
Here’s the button in HTML (assume the form tags):
<INPUT TYPE="button" NAME="Adress_Button"
VALUE="See
My Address">
How would you make the message box appear using HTML? How about JavaScript?
Q & A Goodies
Q.
Hello, I guess you have lots of these to answer so I’d be short. I see that on
your pages the source is almost all same and I don’t think when you edit one
thing you go through all those pages. How can I do that too? I’d really
appreciate for the support, or at least what program or language is being used.
A.
In order to keep our site maintenance to a minimum, we use server side include
files for the more static parts of the site. For example, the header, footer and
left-hand navigation are on every page of the site. Since we don’t want to have
to change every page on the site when we update the copyright, for example, we
make a single change to the footer.html page which is included on every page of
the site.
Here is how we would include our footer file:
<!–# include virtual="/footer.html" –>
This tells the server to go and find our file called footer.html and
insert its contents here. When the page is received by the requesting browser
they will never know that this page contains an included file. The refernece
above is replaced by the code in footer.html.
Cautions:
1. Be careful you use the correct path to your include file. For example, if
your footer.html is in a folder called "navigation" your include file line would
look like this:
<!–# include virtual="/navigation/footer.html" –>
2. If you are using multiple include files be sure they all are
working together. Forgetting to put an end tag like </tr> in one of your include
files can cause unimaginable frustrations. Build your pages carefully and check
your progress often.
Q. Can you tell me how to
block a person from using the view source on an HTML document. I have seen popup
windows saying that you cannot copy & paste this so auction. People like to
steal the source and I have new ones that I do not want taken. I have been
looking online for hours and have yet to find an answer. Your site, is by far,
the best one I have seen. Thanks for your time!
A. I get this question quite
often. Let me first say that there is no fool proof way to lock down your code
and/or images. If someone really wants to take a peek at your HTML, JavaScript
or snitch your images, they will.
However, if you want to slow them down or at least annoy them a bit before they
get to your code you can use some JavaScript to disable clicking on you page.
Here’s the tutorial on how to do it:
http://htmlgoodies.earthweb.com/beyond/noclick.html
Q.
I read your tutorial called "Database Basics: Part I." What I don’t
understand is how this relates to HTML. Do you know where I can find information
on keeping a database in HTML?
A.
Well, the short answer is that databases do not directly relate to HTML.
However, they can be an intregal part of web development. In order to
effectively use a database you will need to learn some additional web related
technologies like ASP, JSP or PHP.
Using a database in cooperation with a web site allows you to make your site
much more dynamic. For example, say you wanted to randomly a quote on the home
page of your site. You could use a database to store as many quotes as you like
and then use a server technology like ASP, JSP or PHP to randomly retrieve one
of your quotes and display it.
That is a very basic example but you get the idea.
Database basics is intended to be series for the folks that are
comfortable with HTML and are ready to move on to something new.
Q.
Looked long and hard but could not find how to add downloads on your site.
A.
Now that is a short and sweet question.
Downloads are relatively easy. If you have a file that you would like to
download like "test.doc", for example, all you need to do is create a hyperlink
that points to your file:
<a href="/downloads/test.doc">Download test.doc</a>
The user’s browser will then prompt them for a place to save the
document, etc.
Be careful if you are using this method for downloading a file format that the
browser might recognize like an image file or and Adobe Acrobat file. These
files will directly display in the user’s browser and they will have to figure
out how to save the file using the browser’s controls.
To avoid a known file format being displayed you could always compress the file
using WinZip or StuffIt. This will give you a shorter download, eliminate the
possibility of the file being automatically displayed and allow you to send
multiple files at the same time. The only drawback to this method is that the
user will be required to have WinZip or StuffIt Expander installed on their
machine. The good news is the expansion software is free.
News Goodies
Are you or were you an @home
subscriber? Would you like to know how the cable companies are handling the
failing @home network fiasco?
Click here to read the article
The newest release of the Apache
Server has just been released. Read about some of the bug fixes that it
addressed.
Click here to read the article
Macromedia has released an update for
their Director tool and
Shockwave. They have added greater XP compatibility and are working on a Mac OSX
version of Shockwave among other things.
Click here to read the article
Quiz Answer
Either way you would use the OnClick
event. This event allows you to make something happen when a user clicks on your
button, like a message box pop up.
HTML:
<INPUT TYPE="button" NAME="Adress_Button"
VALUE="See My
Address"OnClick =
"alert(‘111 West
Nowhere Avenue, Lafayette, IN 00000’);">
JavaScript:
document.forms[0].Address_Button.onclick = fuction() {
alert(‘111 West Nowhere
Avenue, Lafayette, IN 00000’); }
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