Error Configuring Database Instance Properties on Grid Control

Question

Hi All,
My Grid Control is 11.1.0.1.0. I have installed and configured agents on other nodes and the OMS and the monitored Hosts are able to communicate. My problem is when I go to targets/Databases, when I select any database and click configure, I get an error "Error occurred while getting information for the specified target. Possible reasons include: the target doesn't exist; connection to the target failed."
I do not know why I'm getting this error because the agent on the OMS server is running, the agents on the monitored targets are all running and when I check the status, I see the agent is uploading data to OMS. Also When i go to targets/hosts, all the hosts are up.
How can I resolve this problem?
Thank you.

Answer 1

Eric S,
Could be a Firewall issue. See http://download.oracle.com/docs/cd/E11857_01/install.111/e16847/firewalls.htm#i1005951
Firewalls Between the Grid Control and a Managed Database Target
When you are using the Grid Control Console to manage a database, you must log in to the database from the Grid Control Console in order to perform certain monitoring and administration tasks. If you are logging in to a database on the other side of a firewall, you will need to configure the firewall to allow Oracle Net firewall proxy access.
Specifically, to perform any administrative activities on the managed database, you must be sure that the firewall is configured to allow the Oracle Management Service to communicate with the database through the Oracle Listener port.
You can obtain the Listener port by reviewing the Listener home page in the Grid Control Console.
You can check if Listener port 1521 (if that's the port you are using) is open by:
OMS_HOME/bin/tnsping "(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname)(PORT=1521)))(CONNECT_DATA=(SID=sid)))"
If the database in a DMZ runs on Windows you may want to check note: Oracle Connections and Firewalls [ID 125021.1]
From the OMs-server you can ping the target server by FQDN and short name?
Eric