Possible to use Disallow: /*?pp=10 in robots.txt?

My forum has lots of showhread pages in Google with a posts per page value of 10, e.g. /showthread.php?t=5274&page=5&pp=10. Some time ago, I changed that value to 15, so this probably means that Google will apply some kind of duplicate content filter on this forum (seems it already has).

I haven't installed vBSEO yet, but when I do, I'd like to include a command "Disallow: /*?pp=10" to the robots.txt file so all old per page values wouldn't be crawled (vBSEO produces URLs like /thread.html?pp=10). My question is this: is that command possible? I think only Google supports it but they haven't explicitly mentioned a syntax like that on their page: http://www.google.com/webmasters/rem...#exclude_pages . Does anyone have experience with this?

Edit:
Another option would be to add "<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">" to a page where the URL contains a question mark (?). Since I'm not a programmer, I would still need a syntax for this. Anyone?

http://www.robotstxt.org/wc/exclusion.html#robotstxt

Robots.txt does not support regular expressions or wild cards (*).

Note: * used in User-agent: * is the one apparent exception. It means "all robots".

HTML Code:

<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">

http://www.robotstxt.org/wc/meta-user.html

You could probably set up a custom 301 redirect, but I'm not sure if this would be advisable.

Originally Posted by Joe Ward

Robots.txt does not support regular expressions or wild cards (*).

You're right, it's not a standard, BUT... Google does support wild cards:

Additionally, Google has introduced increased flexibility to the robots.txt file standard through the use asterisks. Disallow patterns may include "*" to match any sequence of characters, and patterns may end in "$" to indicate the end of a name.

http://www.google.com/webmasters/rem...#exclude_pages

@PageUp,

this potential problem will be resolved by vBSEO now: Possible duplicate content