Cannot connect over http to openhab 2.0

Hi I am using openhab snapshot, but I cannot connect over http. https works fine.
I tried with several ports (8081 8082 and 8084) in the And tried to connect within the browser with for example but I get:
Site is not reachable: refused connection.

Openhab is running on synologyNAS DS212j DSM 6.0.2-8451 Update 4.
with openhab 1.8.3 http is working fine.

What should I do to make it work with http?