Kolab 2.2, Horde and reverse proxy

[Sylvain MEDEOT]

Hi,

I have a running kolab.

I was running a previous version of horde on an apache server hosted on a different server.

This version of horde is accessible from the internet through an apache reverse proxy :

WAN   <=====> WEB SERVER  <=======>  INTERNAL-SERVER HOSTING HORDE  <===>  KOLAB SERVER
	www.mydomain.com (rev.proxy)					kolab.mydomain.com

With the introduction of horde in kolab 2.2, this architecture is now :

WAN   <=====> WEB SERVER  <=======>  HORDE ON KOLAB SERVER
	www.mydomain.com (rev.proxy)   kolab.mydomain.com

Horde on kolab is working fine and can be accessed normally by 
http://kolab.mydomain.com/horde/

The reverse proxy (apache 2.2.3-4+etch5) is configured in this way :

NameVirtualHost *:80
<VirtualHost *:80>
         ServerAdmin webmaster at localhost
         DocumentRoot /var/www/
         <Directory />
                 Options FollowSymLinks
                 AllowOverride None
         </Directory>

     <Proxy *>
     Order deny,allow
     Allow from all
     </Proxy>
     ProxyPass        /horde/ http://kolab.mydomain.com/horde/
     ProxyPassReverse /horde/ http://kolab.mydomain.com/horde/
</VirtualHost>

NameVirtualHost *:443
<VirtualHost *:443>
ServerAdmin webmaster at localhost
     SSLEngine on
     SSLProxyEngine On
     ProxyPreserveHost Off
     DocumentRoot /var/www/
     <Directory />
     Options FollowSymLinks
     AllowOverride None
     </Directory>

     <Directory /var/www/>
     Options Indexes FollowSymLinks MultiViews
     AllowOverride None
     Order allow,deny
     allow from all

     # This directive allows us to have apache2's default start page
     # in /apache2-default/, but still have / go to the right place
     RedirectMatch ^/$ /index.php
     RedirectMatch ^/$ /apache2-default/
     </Directory>

     ProxyRequests Off

     <Proxy *>
     Order deny,allow
     Allow from all
     </Proxy>
     ProxyPass        /horde/ http://kolab.mydomain.com/horde/
     ProxyPassReverse /horde/ http://kolab.mydomain.com/horde/

</VirtualHost>

I then changed /kolab/var/kolab/www/horde/config.php to adapt horde to the reverse proxy 
setup :

In /kolab/var/kolab/www/horde/config.php :
$conf['use_ssl'] = 2;
$conf['server']['name'] = 'www.mydomain.com';    //$_SERVER['SERVER_NAME'];
$conf['cookie']['domain'] =  'www.mydomain.com';
$conf['cookie']['path'] = '/horde';

In /kolab/var/kolab/www/horde/kolab.php, I also have :
$conf['cookie']['domain'] = 'www.mydomain.com';
(by the way, running kolabconf replaces the original in kolab.php setting but I don't know 
where to fix this setting...)

When I try to access http://www.mydomain.com/horde/, I see the browser accessing 
www.mydomain.com and then kolab.mydomain.com (???) several times... and then I got an 
error message.

/kolab/var/apache/log/apache-access.log
www.mydomain.com - - [03/Aug/2008:18:28:33 +0200] "GET /horde/ HTTP/1.1" 302 26
www.mydomain.com - - [03/Aug/2008:18:28:33 +0200] "GET 
/horde/login.php?Horde=0d157821702de8ca429b9c3da501eb72 HTTP/1.1" 302 358

/kolab/var/apache/log/apache-error.log
Sun Aug 03 18:28:33 2008] [error] [client myip...] access to 
/kolab/var/kolab/www/horde/login.php failed, reason: SSL connection required

I look at my previous horde config on the external server and there is nothing more... 
Horde can be accessed on this server when I revert the original setup so there is 
something to adapt in kolab 2.2 but I can't find what...

Any help welcome,

Kind regards,

Sylvainpo