Vielen Dank, ja ich sehe schon, dass es ein WebServer Problem ist… intern funktioniert, wie erwähnt alles ohne Probleme, extern mit einer NAT Weiterleitung ebenso, nur über den HA Proxy nicht. Aber habe eben die Anleitung von ownCloud zu Rate gezogen, ich müsste da den Proxy eintragen, damit das klappt:
https://doc.owncloud.org/server/9.0/ownCloud_Server_Administration_Manual.pdf
5.16.1 Defining Trusted Proxies
For security, you must explicitly define the proxy servers that ownCloud is to trust. Connections from trusted proxies
will be specially treated to get the real client information, for use in access control and logging. Parameters are
configured in
config/config.php
Set the
trusted_proxies
parameter as an array of IP address to define the servers ownCloud should trust as proxies.
This parameter provides protection against client spoofing, and you should secure those servers as you would your
ownCloud server.
A reverse proxy can define HTTP headers with the original client IP address, and ownCloud can use those headers
to retrieve that IP address. ownCloud uses the de-facto standard header ‘X-Forwarded-For’ by default, but this can
be configured with the
forwarded_for_headers
parameter. This parameter is an array of PHP lookup strings, for
example ‘X-Forwarded-For’ becomes ‘HTTP_X_FORWARDED_FOR’. Incorrectly setting this parameter may allow
clients to spoof their IP address as visible to ownCloud, even when going through the trusted proxy! The correct value
for this parameter is dependent on your proxy software.
Momentan klappt es noch nicht, aber ich probiere noch etwas rum :)
Auf jeden Fall ist das primäre / Thread Problem gelöst, vielen herzlichen Dank an alle :D