PMA behind loadbalancer wrong redirect to port 80

[cidero]

Hi,

if we open https://example.com/phpmyadmin/ we see the login page. After filling out the details and clicking on login we get redirected to the wrong URL https://example.com:80/phpmyadmin/.

This bug was apparently already described in the bug reports #3538, #3692, #3704 and #4120 but either closed as fixed or invalid.
We use the latest version from the Ubuntu 12.04 repository: 4:3.4.10.1-1

The problem is that we use a loadbalancer in front of the webservers to distribute the load and to terminate the SSL connections. User-to-Loadbalancer is HTTPS and Loadbalancer-to-webserver is HTTP. Since PHPMyAdmin receives the request via HTTP it sets the port incorrectly to 80. In the config.inc.php we tried this settings:
$cfg['PmaAbsoluteUri'] ='https://example.com/phpmyadmin/';
$cfg['ForceSSL'] = true;

but in libraries/Config.class.php the following lines overwrite this:

        // Add port, if it not the default one
         if (! empty($url['port'])
           && (($url['scheme'] == 'http' && $url['port'] != 80)
             || ($url['scheme'] == 'https' && $url['port'] != 443))) {
             $pma_absolute_uri .= ':' . $url['port'];
         }

Deleting those lines fixed the issue for us. But with the next upgrade from the Ubuntu repository we will run into the same problem if this is not fixed...

Just created the same bug report at the upstream project: https://sourceforge.net/p/phpmyadmin/bugs/4474/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Michal Čihař (nijel)]

Fixed in 4.6.0 - https://github.com/phpmyadmin/phpmyadmin/issues/11412