Cannot create a database connection

Question

Hi,
I am installing WebCenter Suite 11g. In the first time I install oracle 11g in a VM since the oracle 10.2.0.2 is running in my machine and it cannot be stopped.
The VM is in my machine.
In the DB of VM, I create a user named user2 for testing and connect it via SQL developer.
username: test2
password: test2
Host name: 192.168.222.222
Port: 1521
SID: orcl
It works.
Then, I install the RCU in my machine (not in VM). The rcu need me to key in the DB information.
Host name: 192.168.222.222
Prot: 1521
Service name: orcl
username: sys
passord:********
Role: SYSDBA
However, it shows error messages:
Unable to connect to the database useing the provided details.
Please enter a valid hostname and port or check if the listener is up and running
I also try to create a connection in oracle (10.2.0.2) Net manager (my machine, not the VM) and key the above information. However, it is failed.

Answer 1

I check the IP address of VM and find the correct IP address is 192.168.1.30
I also key in this address in to network connection of the VM. Then, I close the firewall.
Then, in my machine, I can ping this addresss.
In the VM, I can create database connection using 192.168.222.222 as host name. If I use 192.168.1.30 as hostname, the connection cannot be connected.
But when I install the RCU, and key in the following information, it still shows error:
Unable to connect to the database using the provided details.
Please enter a valid hostname and port or check if the listener is up and running. But the oracle in VM is running.
Host name: 192.168.1.30
Port: 1521
Service name: orcl
username: sys
password: ********
Role: SYSDBA