2966710 - ERR_CONNECTION_REFUSED

When executing a URL, the following error message appears (exactly in Google Chrome, in other browsers the structure can be different):

This site can't be reached
xyz.com refused to connect
ERR_CONNECTION_REFUSED

To get more evidence of this issue, it is necessary to take an HTTPWatch trace while the problem is being reproduced (see in KBA 1558903 - How To Trace a Portal Scenario Using HttpWatch).
If the following result appears in the generated file:
Result: net::ERR_CONNECTION_REFUSED

• It indicates that no existing connection to the server was available for use by this request and the browser is creating a new TCP connection to the specified IP address.
• The request returned a HTTP status code failure or caused an internal browser error. Failing requests may prevent a web page functioning correctly and cause performance problems.
• No response headers received because request failed: net::ERR_CONNECTION_REFUSED.

• Database independent
• Operating System independent

 ERR_CONNECTION_REFUSED, This site can’t be reached, refused to connect, proxy settings, firewall settings, This page can’t be displayed, network configuration , KBA , BC-NET , Obsolete - Formerly used for network tests , BC-CST-WDP , Web Dispatcher , Problem