ASP.Net authentication and Googlebot

I have an ASP.Net 3.5 web site with forms authentication en开发者_如何学Pythonabled. Is it possible to have Googlebot crawl my web site without getting prompted for a username/password?

Google claims that is not wont to index page and show them on the users as available that are not, because actually they request user name and password.

It can give the option only to crawl the protect page by the AdSense so he can know what advertize to show on them

https://www.google.com/adsense/support/bin/answer.py?answer=37081

Other solutions that check if is bot or coming from google bot computers are not safe because they can easy spoof by the users, and also may fail to show a preview or a cache of the page.

So you need to think your site structures, what is very important and what is not, to show some part of the pages, hide some other if the user is not register, and that way google have something to index even if its not loged in.

Here is an article:

http://www.guruofsearch.com/google-access-password-protected-site

It would be interesting to see if a google sitemap would result in pages showing up in google - but I doubt that would work either, as the pages would likely need to be crawled anyway.

And some other interesting comments here:

http://forums.searchenginewatch.com/showthread.php?t=8221