I would not recommend it and I never tried, but you can manually open the application backend port to the public. This actually bypasses NS8 Traefik edge proxy.
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Look at Settings > HTTP routes page. Each HTTP application has one or more routes defined. The allocated TCP port number is reported in the route details, under the URL field (see screenshot).
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Refer to Firewall — NS8 documentation to open the port. If the application listens only on 127.0.0.1, opening the port is not enough. You can configure a port-forward, too. Relevant commands are described here: NS8 Change node SSH port 22 permanently - #15 by davidep. Refer to firewall-cmd documentation for more information.
