I am having trouble finding out if a potential server configuration is secure. I have a server running a nginx reverse proxy that is accessible from a public ip address on the ports 80 and 443. I then have a private network that is internal to the machine nginx is running on with a 172.17.%.% address that only the machine can access. They are linux containers.
Is it secure to do a ssl connection to the reverse proxy then regular http to the containers running on the 172.17.%.% network as it is internal to the machine.