It is a very subjective matter, maybe a screenshot of the error could help to better understand if there is a connection problem.

I am not very familiar with Eclipse but I am providing some additional details then you might be able to connect. The username will be "system". The password will be the password you set in the docker run command. The host will be "localhost" The port will be 1521 The service name will be "XEPDB1" You can also create a user using SQL shell for Eclipse: docker exec -it <image_ID> bash sqlplus system/<yourPassword>//localhost/XEPDB1 create user <newName> identified by <userPass> default tablespace users; And then give privileges to this user.