Please check if you have redirections in your
.htaccess file, for example directing all
traffic to the www prefixed site or to a specific domain, e.g. all
traffic to www.example.com, even if it referenced
example.com or example.net in the URL. Such
problems are easy to spot because you have put this code in the
.htaccess file and you should know about what
it does. Just remove it or comment it out.
Maybe you have to set or change the $live_site
parameter in your site's configuration.php.
Normally, Joomla!™ is able to determine the absolute URL to your
site's root without your help. However, it looks like that some
servers lie, most notably Microsoft™ IIS™, so we have to help our
favorite CMS with that. You had the chance to set this URL during
the restoration, but it's never too late. Just edit the
configuration.php file on your site's root with
a plain text editor, e.g. Notepad++ or Kate, and find the line which
starts with public $live_site. Change the rightmost
part (the one between single quotes) to your site's URL, without a
trailing slash. For example http://www.example.com - see?
No trailing slash!
Finally, on some hosts it's required to change or enable the
RewriteBase parameter in your .htaccess file. Most
often than not it's enough to edit the file and find the line
beginning with RewriteBase. If there is a hash in
front, remove it. Change this line so that it reads:
RewriteBase /
or, if you restored in a subdirectory named foobar:
RewriteBase /foobar