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I have a domain abc123.com and a second domain def456.com. I've setup def456.com/forum. However I want users to goto and only see forum.abc123.com.

The forum is SMF. Could anyone point me in the right direction? Maybe I have to use Apache ReWrite rules? I'm not sure.

To be clear, I never want the user to know they are actually browsing on the def456.com domain.

thank you!

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How deep to you want to hide ? If both are on different servers, they can see the IP / Geo localisation / ASnumber / reverse DNS / http 404 specific error –  Mathieu Chateau Feb 4 '10 at 18:48
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2 Answers

up vote 1 down vote accepted

Have forum.abc123.com proxy def456.com/forum. Sort of like (if your using apache):

<virtualhost *:80>
   servername forum.abc123.com
   proxypass / http://def456.com/forum/
   proxypassreverse / http://def456.com/forum/  

Although setting up the forums under forum.abc123.com in the first place would be easier.

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Problem with this is I'm using cpanel on shared hosting. Dont think I can do this –  shaiss Feb 4 '10 at 19:03
You may be out of luck. I looked around the cpanel demo and there doesn't appear to be support for proxying. –  David Feb 6 '10 at 3:44
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you could point forum.abc123.com to the def456.com and there setup a virtualhost to handle forum.abc123.com

You aren't trying to do illegal stuff, are you ?

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LOL no. Just hosting a forum for a friend's site on my server. Could you elaborate a bit please? –  shaiss Feb 4 '10 at 18:53
On your friend dns, make forum.abc123.com point to your server IP. On your server, create a virtualhost which match forum.abc123.com and contains your forum stuff. That simple, even no need for /forum, point it directly to the good root folder –  Mathieu Chateau Feb 4 '10 at 19:01
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