Internal/External IP

OK, I know the difference between an internal and external IP, I'm just not sure how to look at the following networkd configuration.

Our ISP has given us the following IP alotment, and in their own terminology, this is what we've been given:

ext firewall: 208.38.120.244
usable external IP's: 208.38.120.245 & 208.38.120.246
gateway: 208.38.120.241


Internal IP addresses: 208.38.120.248/29
gateway: 208.38.120.249

Bot internal and external have been given a netmask of 255.255.25.248.

Now, my confusion sets in when determining the difference between these internal and external IP's. Technically, I can ping any of these addresses from outside the network, so they are all accessible "externally." Any idea why they are considered internal addresses?

Any help would be appreciated!

The two subnets given to you are both public subnets, meaning all can appear on the Internet __ the way you are seeing them.

However, what exteral refers to is that you should put these IP addresses outside the firewall. The Internals are the ones you can assign to servers that are protected by the firewall.

For example, if you have a mail server on your internal network, then NAT its original IP address to one of the internal IPs given to you by the ISP.

To check the IP address you/servers are using to access the internet, you can click here from your server.

Hope this helps.
The Network Department

Your explanation was perfect. I wasn't thinking of it from a firewall perspective.