如何在Linux / Debian上打开555端口

# phpMyAdmin default Apache configuration
<VirtualHost *:555>
Alias /phpmyadmin /usr/share/phpmyadmin

<Directory /usr/share/phpmyadmin>
    Options FollowSymLinks
    DirectoryIndex index.php

    <IfModule mod_php5.c>
        AddType application/x-httpd-php .php

        php_flag magic_quotes_gpc Off
        php_flag track_vars On
        php_flag register_globals Off
        php_value include_path .
    </IfModule>

</Directory>

# Authorize for setup
<Directory /usr/share/phpmyadmin/setup>
    <IfModule mod_authn_file.c>
    AuthType Basic
    AuthName "phpMyAdmin Setup"
    AuthUserFile /etc/phpmyadmin/htpasswd.setup
    </IfModule>
    Require valid-user
</Directory>

# Disallow web access to directories that don't need it
<Directory /usr/share/phpmyadmin/libraries>
    Order Deny,Allow
    Deny from All
</Directory>
<Directory /usr/share/phpmyadmin/setup/lib>
    Order Deny,Allow
    Deny from All
</Directory>
</VirtualHost>

但mysite.com:555不起作用….