I am having an issue getting Nextcloud documents to open via OpenOffice.
I use the latest lscr.io/linuxserver/nextcloud Docker container and the latest onlyoffice/documentserver Docker container in UNRAID. I use a physical pfsense firewall with haproxy for reverse proxy and SSL cert. Inside my network, it also has DNS configured so that if anyone goes to the external domain name, it will go to the firewall's IP where haproxy will send it to the correct port on UNRAID.
I'm not sure when this broke, but now when I try to open a document, it shows an error saying "Download failed." and looking at the logs for OnlyOffice, I see a nodeJS error due to the DNS resolution for the nextcloud address being a private IP. This is correct for my configuration... Is it possible to allow private IPs for this?