httpd.conf

ServerName debian

<Directory "/var/www">
    AllowOverride All
    Options None
    #Order allow,deny
    #Allow from all
    #AuthType Basic
    #AuthName "Authentification Required"
    #AuthUserFile /etc/apache2/dav_svn.passwd
    #Require valid-user
</Directory>

===============
===============EOF

/var/www/.htaccess

Order allow,deny
Allow from all
AuthType Basic
AuthName "Authentification Required"
AuthUserFile /etc/apache2/dav_svn.passwd
Require valid-user

Nota.- Segun yo para este caso Order allow,deny / Allow from all no son 100% necesarias, corregidme si me equivoco.

================
================ EOF

/var/www/mi_dir_sin_pass/.htaccess

Order allow,deny
Allow from all

=================
================= EOF