Reverse DNS RFCs and Recommendations

Sat Nov 2 01:48:50 UTC 2013

> >> Not necessarily. When the CPE is configured through DHCP (or PPP?),
> >> the ISP can send the secret.
> >
> > Which can be seen, in many cases, by other parties
> 
> Who can see the packets sent from the local ISP to the CPE directly
> connected to the ISP?

The NSA, FBI, CIA, DHS. Or, the ISP, the ISP's employees, contractors, sub-contractors. Or the phone company handling the PPPOE, L2TP, or whatever else. Or the WiFi sniffer on the street outside.