Why am I seeing private ip's on a public network
Ladies & Gentlemen,
Thanks for a great site.
Sorry if this is in the wrong form.
I am seeking some help in understanding what I am seeing at my server via etherape. I have a partial understanding, but you know, a better understanding is better.
What I am seeing is on my linux nat/router. On eth1 which is connected to the cable modem I am seeing, in etherape, the ip 10.158.96.1 which is a private ip as I understand it. What I think is happening is that my isp is using that ip for their dhcp server. I never see this ip talk to any other ip except 255.255.255.255 which as I understand it is a broadcast ip.
The ip my nat/router is assigned is not in the private range. I am just not understanding the reasoning behind why they are using this private ip for their server. This ip always seams to use the bootp protocol and never anything else. I do not know what port it is using, have not perused it.
Occasionally I see a different private ip 172.19.41.x I have no idea what this ip is. I am assuming that it is also some kind of server because it only ever talks to the 255.255.255.255 broadcast ip and seams to only use the bootp protocol.
Neither of these two ip ever show up on eth0 which is my local network.
Can anyone give me some help in understanding the reasoning behind this apparent set up?