Can't connect to DB in virtual machine

Question

I'm having a problem when trying to connect to a DB installed in my Redhat virtual machine.

I have oracle XE installed in my VM. Here is my port forwarding configuration:

However, when I try to connect using the SQL developer on Windows, I can't get a connection and I get the following error when testing the connection:

How can I solve this? Thanks

Answer 1

Solved.

All I had to do was stop the iptables firewall in RHEL

service iptables stop

I've removed iptables so this won't happen again, but that is entirely up to you!