Recently I've received my first Soft 404 in GWT.
I use a VB forum and some of my forums are private, which means that guests have to register in order to read the threads. I let guests see the thread title and links thought which is probably what Googlebot is following.
So here are my questions:
1. What HTTP header should I return if not 200? (it's not a 404 either, the content exist but not for guests)
2. Would allowing Googlebot to crawl be ok? I don't think that's cloaking and I see many sites doing this. Or will it penalize me somehow?
Anyone who knows of the vBulletin plugin let me know :)