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Connecttion reset issue

Hi, I am new to Oracle database and installed Oracle Virtual Box MAnager. I got it running and then installed SQL developer. However, when I try to create a new connection using the following details from my online course:

username: hr

password: oracle

hostname: localhost

port:1521

service name: freepdb1

I receive the following message:

ORA -17002: Connection reset or established connection was aborted by software in your host machine.

I downloaded SQL developer version with Java.

I tried uninstall everything and reinstalled, but I still cannot establish a connection. I tried to adjust some firewall and security setting, but the issue persist.

Could someone please help me resolve this?

Big thank you

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Added on Mar 1 2025
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