If you do not define localhost as the loopback address, the End Point Operations Management agent does not register and the following error appears: Connection failed. Server may be down (or wrong IP/port were used). Waiting for 10 seconds before retrying.

As a workaround, complete the following steps:


Open the hosts file /etc/hosts on Linux or C:\Windows\System32\Drivers\etc\hosts on Windows.


Modify the file to include a localhost mapping to the IPv4 loopback address, using localhost.


Save the file.