...

Find out the ipaddress of the container:
sudo docker inspect apelon | grep IPAddress

User Authentication

Please check apelon dts web site for more information about how to set up user authentication.  By the default authentication is disable on apelon-docker.  This is defined on apelon-docker / apelonserverprops.xml,  <property name="authentication" value="false"/>.    

References

ApelonDTS 

http://apelon-dts.sourceforge.net/ 

...