301 Redirect Whole Site Except One Folder, leave Add-on domains alone

Question

I have a brainteaser and need help from people smarter than me. I have a shared hosting account. I'd like to 301 forward the root URL (say, domain.org) to a new URL. I also want one folder (/blog/) to be left alone (not forwarded). I was able to find an example of this here, and I put together this potential scenario for doing that:

RewriteCond %{REQUEST_URI} !^/blog/
RewriteRule ^(.*)$ http://newdomain.org/$1 [L,R=301]

I believe that this should be OK, but here's the trick: I have add-on domains in this hosting, and if I use the above, I'm pretty sure that I will forward every one of them to newdomain.org, not just domain.org. I did some testing using more specific text strings in the first spot following RewriteRule, but I can't seem to get the syntax without blowing up my site and getting a 500.

Any ideas would be greatly appreciated!

Thanks, Dave

Answer 1

Try adding another condition:

RewriteCond %{HTTP_HOST} ^domain\.org$ [NC]
RewriteCond %{REQUEST_URI} !^/blog/
RewriteRule ^(.*)$ http://newdomain.org/$1 [L,R=301]

Where domain.org is the domain that you want everything to be redirected to newdomain.org, except /blog/.