To update the code remotelly using git push commands and a git hooks. We would need a public ip for the institution and setup NAT port forwarding for the 32 clients. So we need a range of 32 unused ports only open for the specified clients mac addresses.
To be able to remoetlly access the machine and prefrom system updates we need to be able to do SSH connections to them. To do that we will need to setup NAT port forwarding for each client too.
So all in all we need a range of 64 open ports.
If the clients themselves can have static ip’s then we wont need NAT port forwarding, but that is unlikely.