I have installed HDP sandbox 3.0  and installed NIFI in the same cluster using HDF 3.4 mpack. The problem i am facing is, NIFI  won't open from my host browser even though it is running. "listening to Bootstrap on port 37693" also no errors whatsoever from nifi   I can curl to NIFI from within hdp (using a shell) but not from my host (windows). Error from curl: * Trying 127.0.0.1... * Connected to localhost (127.0.0.1) port 9090 (#0) > GET /nifi HTTP/1.1 > Host: localhost:9090 > User-Agent: curl/7.55.1 > Accept: */* * Recv failure: Connection was aborted * Closing connection 0 curl: (56) Recv failure: Connection was aborted   All other services are running fine. A few things i have tested but didn't work: Tried changing nifi.web.http.host to 0.0.0.0 or 127.0.0.1. Tried changing port from 9090 to some other but problem persist. (just to mention port is forwarding as well from VirtualBox) Disabled my windows firewall just to be sure it is not blocking that port. I have tried to apply many suggestions given in similar threads but nothing seems to work for me. I am attaching my port configuration of VirtualBox and ports it is listening on in HDP.   ... View more