Reverse DNS RFCs and Recommendations

Mark Andrews marka at
Sat Nov 2 10:51:33 UTC 2013

In message <5274A77A.8090403 at>, Masataka Ohta writes:
> Mark Andrews wrote:
> >> Who can see the packets sent from the local ISP to the CPE
> >> directly connected to the ISP?
> > 
> > The dhcpd traffic coming in over the cable modem and you want to
> > send secrets in the clear over a channel like this.
> Over the cable modem?

> The cable modem is the CPE, which accept the DHCP packet to it.

A cable modem both accepts DHCP packets (for management of the
modem) and passes DHCP packets through to the customer device.

> 						Masataka Ohta
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

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