authentication via web page

[Al Zick <al@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

I am considering switching to authentication via a web page. Are  
there examples of how to do this somewhere? What are the pros and  
cons of this configuration? I am very concerned about security with  
web page authentication.

Also, I am not really sure if it is a good idea. For example, in most  
emails the images in them are not sent as attachments, they are  
downloaded from a web server and go through the proxy. If a re-write  
was used to load the authentication page, then it would put that page  
in place of the image. How would you authenticate the proxy with this  
scenario?

I will probably need a consultant to help me through this project  
because I have been working on this way too long. Would anyone be  
available?

Thanks,
Al