Process Unable to Connect - Connection Refused

Document ID : KB000103853
Last Modified Date : 06/07/2018
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Introduction:
During the course of investigation for why a process is not connected, errors such as the following are observed in the Agent/WP/CP log files:

U02000012 Connection to Server 'x.x.x.x:xxxx' denied. 
Connect-Error: 10061 (No connection could be made because the target machine actively refused it.)
Question:
Why is this error being reported by Automic?

How can we resolve this issue? 
Environment:
Any
Answer:
These error messages are reported by Automic from the OS, and not caused by our software. Generally, we observe these errors when there is a new firewall in place (or the rules changed), anti-virus software (such as McAfee), or a network outage. We suggest having the network/administration team look into the reported time frame, as they may be able to tell more about what was happening on that system.