are you saying you want the same codebase to drive another website, on another server, with a different domain?

Or do you want 2 installs to use the same database?

Can you elaborate a bit?

YES .. esaxtly
.....the same codebase to drive another website, on another server, with a different domain?

If it can be done ?

I see that there is a C5 addon - where I redirect the other domain
BUT guess that it not good for SEO

Not with just one instance of the code. But you could copy the code to another server and it is even possible to synchronise code files from one code instance to another. However, if both are live sites that would be a second site, so you would need a second license for any addons and themes installed.

Okay .. I see

I would consider an Iframe solution, in some blogs and articles google and other
search engines now crawls iframes

Cheers

If on a c5.6.x core, you can also use the Box Grabber addon, or RSS feeds, or my Universal Content Puller to show one sites content within another site. http://www.concrete5.org/marketplace/addons/universal-content-pulle...

W did this exact same thing with Symfony2, but it required that we add a domainID to the database. I suspect you would have to do something similar with C5 as well (not such a small task either)

Optionally, (I am thinking off the top if my head, so this may be completely wrong!), if the two sites were identical except for the domain name, perhaps you could just close site #1 to site #2 then remote access site #2 to the same database.