Problem with access from the Internet

Hello Friends.
I'm come across a problem that i can't solve and i don't know why and i hope you can help.
My Problem is, that when a User connects over the Internet to my OnlyOffice, he can't upload or edit any files. I get the errormessage:
ONLYOFFICEâ„¢ is not available. Please contact us at support@onlyoffice.com
From the LAN there is no Problem, only from the Internet...
I tryed some different things out, but nothing worked.
I don't know if i done something wrong in the Konfigurations(Documentservice) or what the Problem is.
My Documentservice Settings are:
http://mydomain.com/coauthoring/CommandService.ashx
http://mydomain.com/FileUploader.ashx
http://mydomain.com/ConvertService.ashx
http://mydomain.com
My OnlyOffice is installed on an Hyper-V Cluster on a VM that is running an Ubuntu 16.04 LTS.
The installation is done with Docker(installation Guid from OO without the Mailserver), and the DMZ is done with a Netscaler(that should be correct configurated).
Regards
DomCom
I'm come across a problem that i can't solve and i don't know why and i hope you can help.
My Problem is, that when a User connects over the Internet to my OnlyOffice, he can't upload or edit any files. I get the errormessage:
ONLYOFFICEâ„¢ is not available. Please contact us at support@onlyoffice.com
From the LAN there is no Problem, only from the Internet...
I tryed some different things out, but nothing worked.
I don't know if i done something wrong in the Konfigurations(Documentservice) or what the Problem is.
My Documentservice Settings are:
http://mydomain.com/coauthoring/CommandService.ashx
http://mydomain.com/FileUploader.ashx
http://mydomain.com/ConvertService.ashx
http://mydomain.com
My OnlyOffice is installed on an Hyper-V Cluster on a VM that is running an Ubuntu 16.04 LTS.
The installation is done with Docker(installation Guid from OO without the Mailserver), and the DMZ is done with a Netscaler(that should be correct configurated).
Regards
DomCom