No access graylog webinterface

Hi,
First of all I am a rookie on linux OS…so please be patient with me.
I am trying to run a graylog server on a Windows Server 2016 Hyper-V with Debian Stretch.
I did follow the instructions from http://docs.graylog.org/en/3.0/pages/installation/os/debian.html and so far I can see all of the services (MongoDB, Elasticsearch and Graylog) have the Status of active.
● graylog-server.service - Graylog server
Loaded: loaded (/usr/lib/systemd/system/graylog-server.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2019-06-18 14:14:17 CEST; 9min ago
Docs: http://docs.graylog.org/
Main PID: 1174 (graylog-server)
Tasks: 20 (limit: 36864)
CGroup: /system.slice/graylog-server.service
├─1174 /bin/sh /usr/share/graylog-server/bin/graylog-server
└─1177 /usr/bin/java -Xms1g -Xmx1g -XX:NewRatio=1 -server -XX:+ResizeTLAB -XX:+UseConcMarkSweepGC -XX:+CMSConcurrent

Jun 18 14:14:17 lx4 systemd[1]: graylog-server.service: Service hold-off time over, scheduling restart.
Jun 18 14:14:17 lx4 systemd[1]: Stopped Graylog server.
Jun 18 14:14:17 lx4 systemd[1]: Started Graylog server.

As well (for my point of view) the log file do not show any errors
2019-06-18T09:06:25.752+02:00 INFO [CmdLineTool] Loaded plugin: AWS plugins 3.0.2 [org.graylog.aws.AWSPlugin]
2019-06-18T09:06:26.508+02:00 INFO [CmdLineTool] Loaded plugin: Collector 3.0.2 [org.graylog.plugins.collector.CollectorPlugi$
2019-06-18T09:06:26.509+02:00 INFO [CmdLineTool] Loaded plugin: Threat Intelligence Plugin 3.0.2 [org.graylog.plugins.threati$
2019-06-18T09:06:53.317+02:00 INFO [CmdLineTool] Running with JVM arguments: -Xms1g -Xmx1g -XX:NewRatio=1 -XX:+ResizeTLAB -XX$
2019-06-18T09:07:34.482+02:00 INFO [Version] HV000001: Hibernate Validator 5.1.3.Final
2019-06-18T09:09:38.132+02:00 INFO [InputBufferImpl] Message journal is enabled.
2019-06-18T09:09:42.167+02:00 INFO [NodeId] Node ID: 234d0035-af3b-4222-8afb-806b45c65f95

Unfortunately I am not able to Access the graylog webinterface. Tried on local machine with address 127.0.0.1:9000 as well changed the http_bind_address to my server ip e.g. 192.168.170.102:9000 Access on local and remote machine had no success.

Please I am happy for any support.
Thanks, Markus

No one any idea where my problem is?

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