Error Message Indicates the IP Address of the Server Could Not Be Determined

Problem:

An error message containing the following text appears:

The IP address of the server could not be determined by the system.

This error indicates that the Enterprise Manager is unable to connect to a managed server Server that is managed by the Enterprise Manager application..

This error may appear in the System logs or on these Enterprise Manager tabs:

System Management, Enterprise, Settings
System Management Module that allows performing suite-wide system management activities from a single, Web-based application, the Enterprise Manager., Enterprise, Configuration Status
System Monitoring, System Monitor, Alarm Status

Solution:

This problem usually indicates that the Domain Name System (DNS) does not have an entry for the host name entered on a managed server’s Settings tab or that a firewall is blocking the connections between the Enterprise Manager and a managed server.

The solution to this problem is the same solution that is described in the topic Error Message Indicates Unknown Host.