Hello,

Connection refused means that yhe plugin still can’t connect to your TCP port, so this is not a problem with IP filtering or authentication. Once you get an HTTP error response (such as 403 or 401) you will know that at least connection has succeeded. All I can tell you is that there must still be some firewall in place that’s blocking incoming connections to your wallet server on this port. It might be worth checking with your hosting provider If unsure.

Please let me know if you encounter more problems.