> aren't you worried about security of those devices
Assuming he is having a firewall configured on his gateway then it is not any different from security standpoint than being behind a NAT.
For example in my university, all computers have a public IPv4 address, it still does not mean you can connect to them from outside, but if you need to open a port to the world you don't need to deal with all that NAT crap.
Assuming he is having a firewall configured on his gateway then it is not any different from security standpoint than being behind a NAT.
For example in my university, all computers have a public IPv4 address, it still does not mean you can connect to them from outside, but if you need to open a port to the world you don't need to deal with all that NAT crap.