PhpBB – Any problem blocking some public forums using noindex?

PhpBB and google

[webgp]

I trying to optimize my phpBB to google and I already removed SID , sessions Ids.

I saw some tips to block pages using robots.txt file , but I like to dynamically block pages according to page parameters, for instance ,

Forum 1 link is [mysite.com...] and I would like that google index this forum.

Forum 2 link is [mysite.com...] and I would not like that google index this forum then inside my phpbb script I insert meta tag
<meta name="robots" content="noindex,nofollow">

For instance , Forum 2 is general chat forum for subjects not related to my site then is not interesting that google index this forum.

Do you know if have any problem with google using noindex,nofollow dynamically depending of url paramenters?

I would like to block some double content page that phpBB can present, for instance,

This link is for topic 100
[mysite.com...]

but phpBB also present a link to last post of the same topic

[mysite.com...]

Both links normally present the same content if the topic is in a single page and I would like to block the second page with p=500 parameter using noindex,nofollow meta tag if parameter is “p”.

[daamsie]

I don't imagine there being any problem. To google the page is a seen as static (just like it is seen by the end-user), so it should respect the meta robots tag as any other.

[enotalone]

webgpm i agree that there should not be a problem with asking google not to index those pages.

on the other hand phpbb's previous / next topic links might also be considered confusing to google.

instead of t={$topic id} previous next are formated t={$current topic id}&view=next.

I personally still you sid (session id) variables with phpbb and google indexes, ranks and send great traffic to those pages. in fact number one section getting the most traffic from google are forum pages.