Redirection problems often occur after migrations.
My forum was migrated from vBulletin to Xenforo.
The vBulletin redirection add-on is no longer supported, and did not work for me.
 
My forum is like a research blog.
www.purebibleforum.com

Current Google searches are generally based on the old urls, and give:

==============

Not Found
The requested URL /showthread.php was not found on this server.
Apache/2.4.25 (Debian) Server at www.purebibleforum.com Port 443

==============

Over time, Google would likely catch up to the current forum, but it is unclear how long it would take, and when they would drop the invalid links. In the meantime, this makes Google and other search engines unusable, and this is very frustrating to those trying to use the forum material. Same with links that were placed on other groups and forums. (We are trying a special attempt to handle the internal links within the forum.

So the need, if it is possible, is for someone skilled with Apache with PHP and whatever is the skill-set to go in there and intercept those misses, and put up either the Xenforo front page, or, better yet, a special landing page that explains that we have redirected from the Google search. And inviting the user to search using the internal forum search (which might be enhanced by an add-on.)

In the best world, the parameters of the search would be passed, more or less, to the internal search, that is getting a bit more sophisticated, and may not be possible.

Please contact me if you think this is the type of (paid) project you could do and would like to do!

And feel free to discuss, improve and troubleshoot this idea on this thread as well. Also the whole world of forums and migrations.

As an aside, I remember we had someone do something on my WordPress business site where they bypassed the normal processes and put up a landing page, specialty, explaining that we were down for the day. (Sometimes there might even be a plug-in for that in WordPress.)

If you are involved in the Xenforo world, clearly that is a big plus, and could lead to more action. Or you might like understanding why it has become the go-to forum of choice for many.

The site is on Linode, on a VPS unmanaged server. Access will be fully available.

Your thoughts welcome! 
And if you have a special spot where you think this might get a good response, share away.

Steven

Google searches now have TONS of ADS on each page.

It used to be two or three, now most of the page can be ads.