301 redirects

My forum has been converted from PunBB to vBulletin to XenForo, but is there anyway to get my old links to redirect correctly into XenForo, and old link is for example:

www.mydomain.com/viewtopic.php?id=92

How can I redirect these topics?

Thanks

 

Maybe something like this, but it doesn't work?

RewriteRule ^viewtopic.php?id=([0-9][0-9])$ /viewtopic.php?id=$1/ [R]
RewriteRule ^threads/([0-9][0-9])/$ /threads=$1

Or

redirect 301 /viewtopic.php?id= /threads/

 

The topic IDs will be different so I don't think it would work without a more involved approach.

 

The threads I've looked at so far have the same ID.

 

Oh, then I don't know why the RewriteRule doesn't work (they are new to me). I had trouble with them too.

What happens when you go to the old link? Do you get a 404?

 

Strange, I just checked some more links, some of them have the same ID, other don't.

Is it the conversion from punbb to vbulletin that did this, or the conversion from vbulletin to xenforo?

 

The IDs aren't the same because of deleted threads.

Both importers will reset the IDs.

 

Depending on how big your forum is and if you have a sitemap, you could use this to redirect the threads... but only the first page.

http://xenforo.com/community/threads/crude-way-of-doing-301-redirects-semi-manually.5842/