Network Management

Unable to install APE or AWS "An existing connection was forcibly closed by the remote host"

This article shows how to resolve an issue when installing an Additional Polling Engine or an Additional Web Server which keeps showing "An existing connection was forcibly closed by the remote host" error message.

First published date

5/5/2020 10:09 PM

Last published date

2/10/2025 2:25 AM

Overview

During the process of installing an APE or AWS, the new server needs to contact the primary Orion server and access the Orion Web Console to download the installation files.

Doing so, getting an error similar below:

The communication to the main polling engine server failed
An existing connection was forcibly closed by the remote host

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Product section

Orion Platform

Cause

  • An issue with Encryption Algorithm on both servers
  • Firewalls are overly aggressive even if ports are confirmed open

Resolution

For a possible issue with the Encryption Algorithm on both servers:
  1. Download and Install the IIS Crypto tool in Nortac Website ( https://www.nartac.com/Products/IISCrypto/ )
  2. Apply the Best Practice on both servers and reboot
  3. Re-run the installation again
If the issue still persists, verify if ports are open Use PowerShell to test that a port is open on a server. If needed ports are open to being able to have good communication in between the Main Polling Engine and the Additional Polling Engine or the Additional Web Server.

Proceed on verifying any Firewalls that are overly aggressive even if ports are open but protocol matching is on. Try to turn off protocol matching (or set it to "ANY"). Re-run the installation again.