RewriteEngine on

RewriteRule ^post/(.*)$ /viewpost.php?post=$1
#RewriteRule ^post/(.*)$ /blog/viewpost.php?post=$1

<Files "dopost.php">
	AuthType Basic
	AuthName "Secure"
	AuthUserFile /var/www/.htpasswd
#	AuthUserFile /var/www/blog/.htpasswd
	Require Valid-User
</Files>