Here is my robots.txt for my Vbulletin forum:
CODE
User-agent: *
Disallow: /cgi-bin/
Disallow: /forums/attachment.php
Disallow: /forums/avatar.php
Disallow: /forums/editpost.php
Disallow: /forums/member.php
Disallow: /forums/member2.php
Disallow: /forums/misc.php
Disallow: /forums/moderator.php
Disallow: /forums/newreply.php
Disallow: /forums/newthread.php
Disallow: /forums/online.php
Disallow: /forums/poll.php
Disallow: /forums/postings.php
Disallow: /forums/printthread.php
Disallow: /forums/private.php
Disallow: /forums/private2.php
Disallow: /forums/report.php
Disallow: /forums/search.php
Disallow: /forums/sendtofriend.php
Disallow: /forums/threadrate.php
Disallow: /forums/usercp.php
Disallow: /forums/admin/
Disallow: /forums/images/
Disallow: /forums/mod/
Disallow: /admin/
Disallow: /cache/
Disallow: /albums/
Disallow: /gallery/
Disallow: /downloads/
Disallow: /images/
Disallow: /includes/
Disallow: /language/
Disallow: /manuel/
Disallow: /modules/
Disallow: /netpbm/
Disallow: /tmp/
Disallow: admin.php
Disallow: auth.inc.php
Disallow: banners.php
Disallow: config.php
Disallow: counter.php
Disallow: download.php
Disallow: footer.php
Disallow: friend.php
Disallow: header.php
Disallow: index.php
Disallow: links.php
Disallow: mainfile.php
Disallow: modules.php
Disallow: reviews.php
Disallow: sections.php
Disallow: stats.php
Disallow: top.php
Disallow: topics.php
Disallow: user.php
Disallow: vbp_includes.php
Disallow: vbpolls.php
Disallow: viewtopic.php
Disallow: voteinclude.php
Might help you set yours up for IPB.
Yes I have most of it disallowed but what is not disallowed the spider can crawl
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