Sonarqube not responding to traffic from the internet

Hello, We have an hyper-v machine in our DMZ with a Ubuntu machine on it. On the VM Sonarqube is installed. Wen wee try to access it from inside the network by ip there is nothing wrong and it works fine. We have setup a firewall route to forward all traffic from the internet to the VM. The forwarder as we setup is correct as we used it multiple times with other servers and works fine. The VM has 1 nic with the internal ip on it. Is there something we are missing? If you need any more information please let me know. Thanks in advanced.