I found that the App Platform does not support fixed IP addresses, which I require to whitelist.
The service is a VPS in Digital Ocean, and I need to allow the App Platform Container to access it.
sudo ufw allow from xxx.xxx.xxx.xxx to any port yyyyy
Does DigitalOcean have a range of IP addresses I can at least use to whitelist via UFW, please?
Just to be clear, I understand I can open the port from anywhere:
sudo ufw allow PORT_NUMBER/tcp
But this is not good…
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