and how many files are there?
If there aren't too many - say a hundred or so, and you simply want to allow visitors to have a copy of the drawings the best way is to convert them to PDF files, and put them into a separate directory on the server. You can then create a table on an html page and fill it with hyperlinks to individual drawings. Most people have Adobe Acrobat reader on their computers, and clicking a link will display the drawing in the reader.
Otherwise, you can convert the drawings to JPEG images and link to them in a similar way. These files will be displayed in a visitor's browser in the normal way.
One of the problems with Autocad drawings is that they can be physically large, and have to be reduced in size if you make PDFs of them. This creates problems with scale. You'll not be able to display files like this in the browser, but you can certainly offer them as downloads - provided your recipients have autocad software in which to open them.
If you supply a bit more information about what you want to do one of us will help in more detail.