How to prevent directory from being accessed by search engines?

[KTaylor]

I'm assuming you want all search engines blocked from this directory. If so, edit your robots.txt file to state the following. This will block all bots from accessing a folder/directory on your site

User-agent: *

Disallow: /directoryname

[Xee]

I don't have a robots.txt file in my root. Do I just create a text file, put the above lines into it, and upload it to my root after changing the name?

[edwardlewis]

shouldn't you put a slash at the end of the directory in the robots file?

you can create the robots file through the Google Webmaster Tools

[Naghirniac]

If you don't have an robot.txt file, you need to include some important stuff first.

First, do you have a sitemap.xlm for your website? If not, its very important and you should creat it at: http://www.xml-sitemaps.com/

Create a robot.txt file and include the follow:

User-agent: * allow: / disallow: /directoryname
Sitemap: http://www.yousite.com/sitemap.xml

With this you will inform all robots where is your sitemap. You should read more about robots.txt in this great post: http://www.seomoz.org/blog/robot-access-indexation-restriction-techniques-avoiding-conflicts

[Xee]

As it is, my site is just phpBB3 forums (www.bearsfansonline.com); would a sitemap really help that much?

[KTaylor]

It's not required to have the ending slash. At least, it works for us without it.

[Naghirniac]

Xee,

It always help, and it is very easy to implement. This function to show the path to the sitemap ir very good.

[A_Q]

The robots.txt file does not guarantee that your pages will not show up in search results! Your best bet after password protection is adding a NoIndex meta tag to you page headers.

Google have openly said that they obey this tag (Matt Cutts).

[KTaylor]

You're absolutely right! I left that part out. Thanks

[cchhita]

But don't forget to remove that Disallow out of Robots.txt when you go live - if you want those pages to be indexed (and also the Meta-robots noindex nofollow).

Otherwise you might be pulling your hair out trying to figure out why none of your pages are getting indexed in the SERPs.