Missing ControlUp TCP port 40705 access to the target computer

ControlUp Agent Error Message

Failed to open connection to the remote agent. Failed to open connection.

Could not connect to net.tcp://FQDN:40705/cuAgent. 
The connection attempt lasted for a time span of 00:00:XX:XX:XX. TCP error code 10060: 
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond IP_ADDRESS:40705.* 

Suggested Solution

Configure an inbound Windows firewall rule to allow incoming access to port 40705. You can do this with PowerShell:

New-NetFirewallRule -DisplayName "ControlUp Agent Port" -Direction Inbound -LocalPort 40705 -Protocol TCP -Action Allow

Alternatively, you can automate this task by configuring the “Define inbound port exceptions” GPO setting and adding the following value: “40705:tcp:*:enabled:ControlUp-Agent”