My own module, authorization and Proxy

[Petr Hracek <phracek2@xxxxxxxxx>]

Hello *,

In my Apache2 (2.2.3) configuration file I have:
<VirtualHost _default_:443>
SSLEngine on
SSLProxyEngine on
DocumentRoot "/opt/apache/htdocs/ssldocs"
ProxyPass       /PAC/   http://192.168.187.101:8080/PACCBAdmin

ProxyPassReverse    /PAC/       http://192.168.187.150:8080/PACCBAdmin/

RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* - [F]
RewriteMap unity txt:/opt/apache/conf/unity.map
RewriteRule ^/([^/]+)$              ${unity:$1|/$1} [L]
RewriteRule ^/([^/]+)/(.*)  ${unity:$1|/opt/apache/htdocs/ssldocs/$1}/$2 [L]
RewriteRule ^/PAC$ http://192.168.187.150:8080/PACCBAdmin [P]

RewriteRule ^/PAC/(.*) http://192.168.187.150:8080/PACCBAdmin/$1 [P]
RewriteLog "/var/log/apache2/rewrite_log"
RewriteLogLevel 3

<IfModule mod_authz_host.c>
    <Directory />
        Options +Indexes +Multiviews
        AuthType MSEC
        require valid-user
        satisfy Any
    </Directory>
</IfModule>

<Location "/PAC/">
    ProxyPassReverseCookiePath /PACCBAdmin /PAC
    AuthType  MSEC
   require valid-user
</Location>

</VirtualHost>

In the my modules which takes care about AAA, Security issues, etc.

I would like to do something like:
when user add to the URL following https://<ip_address>/PAC/
then first of all they should enter username/password authorization and afterwards proxy page is opened. Authorization is done over AuthType MSEC in my own module
When the RewriteRules are done as above then URL https://<ip_address>/PAC/ is authorized by my module
but page which is shown in browser is HTTP 404.

When the RewriteRule:
RewriteRule ^/PAC$ http://192.168.187.150:8080/PACCBAdmin [P]
RewriteRule ^/PAC/(.*) http://192.168.187.150:8080/PACCBAdmin/$1
 [P]
is moved before
RewriteRule ^/([^/]+)/(.*)  ${unity:$1|/opt/apache/htdocs/ssldocs/$1}/$2
 [L]
then username/password page is not shown but /PAC/ URL is working (but without authoziation.
As I found in the RewriteRule instead of row
RewriteRule ^/([^/]+)/(.*)  ${unity:$1|/opt/apache/htdocs/ssldocs/$1}/$2
 [L]
which means that this RewriteRule is last should be something else.

Could you please help me with that issue

Thank you in advance

-- 
Best Regards / S pozdravem
Petr Hracek