Just to be sure if it is a nginx problem or something related to the webserver, if you try to access WordPress directly, i.e. not via the Nginx proxy, does all work fine?
If i go directly to apache which is listening on the port 3000 (www.mysite.com:3000) i get the same behavior. I’ll try a fresh wordpress install and see what happens.
Weirdest thing, I deleted the database and went into http://www.mysite.com, and the redirect loop was gone, I got a msg that wordpress couldn’t find a DB which was supposed to happens. Then I created a new database, ran the wordpress install and the same arises. The admin works fine but the site page gets redirect loop.
Just to be sure, are you using twenty eleven theme and no plugins at all? This is just to make sure it is not a problem from the theme or a problem from a plugin.
Yep, Twenty eleven with no plugins at all.
Update, when Site Address (URL) = http://appsrd.devmbs.com:3000, the site is loaded, but I don’t want the user to see that is running in another port so when i set Site Address (URL) = http://appsrd.devmbs.com is when i get the redirect loop, but this is only for the site address, WordPress Address (URL) works fine either way I’m able to log into dashboard.