Issue Restrict Access to REST API

[bravo68web]

I have an NodeJS REST API running on Ubuntu Server on port 8080

I have used ```ProxyPass``` and ```ProxyPassReverse``` to **api.domain.tdl**

Can anyone help to restrict the access to ``localhost`` and Server's IP

I have tried nginx conf
```
allow xx.xx.xx.xx;
allow 127.0.0.1;
deny all;
```

But this gives me error when I visit **api.domain.tdl**
```
403 Forbidden
```

I am using Plesk Obsidian