Hello Gasmyr,
I found the origin of the second error : the VM was not rebooted on the same IP with DHCP. I reserved the installation address.
I also completed my /etc/hosts on the host machine with the correct IP and I'm now able to connect to oxtrust.
Thank you for your hints and your time.
Maybe these informations should be added in the installation guide (adding the IP to /etc/hosts of the host) and in the FAQ (reserving the IP chosen during the installation) ?
By the way, why Gluu needs its own IP address and can't use dynamic addresses ?
Regards,
Pierre