Web
redirection and "cloaking" with ASP script
Some
ISPs offer "web redirection" service, where they
will redirect web-requests for your domain name to another
website.
For example from www.myname.com to www.ispname.com/~myname
or from www.myname.com to myname.ispname.com.
You can
do simple redirection with CNAME (alias) DNS records, but
this does not work if you need to redirect to a sub-directory
(like the first sample above), or if the destination web-server
is using virtual hosting (multiple domain names on the same
IP address).
Domain
redirection is most often done on a web-server with some type
of script.
(often in combination with a database if redirecting many
domain names)
You can
do this with ASP script on IIS or PWS.
First
create a DNS A-records for the domain name pointing to the
IIS/PWS web-server that will do the redirection (not the destination
web-server).
Then
create a "default.asp" page on this web-server with
the following contents:
<%
Select Case Request.ServerVariables("HTTP_HOST")
Case "myname.com", "www.myname.com"
Response.Redirect "http://www.ispname/~myname"
Case "othername.com", "www.othername.com"
Response.Redirect "http://www.ispname/~othername"
End Select
%>
Add "case"
statements for each domain name you want to redirect.
You can automate this further with a database containing each
domain name and corresponding redirect destination.
On IIS
you can also point 404 errors (page not found) to this ASP
page so requests for individual pages will also be redirected
correctly.
Another
variant of this is called "cloaking" - where your
domain name still shows in the browser's address bar even
after the redirection.
This is achieved by "hiding" the redirection in
a frame-set where the first frame is zero width or height:
<%
Select Case Request.ServerVariables("HTTP_HOST")
Case "myname.com", "www.myname.com"
destURL = "http://www.ispname/~myname"
Case "othername.com", "www.othername.com"
destURL = "http://www.ispname/~othername"
End Select
%>
<html>
<frameset cols="0,*"
framespacing="0"
border="0" frameborder="0">
<frame name="zero" scrolling="no" noresize>
<frame name="main" src="<%=destURL%>">
</frameset>
</html>
PLEASE
NOTE: Microsoft Personal Web Server (PWS) limits the maximum
number of simultaneous connections, and thus may not be appropriate
for busy web-sites.
For more information or to post questions or comments about
the use of our products please visit our Online Support
Forum.