Reverse DNS RFCs and Recommendations

Sander Steffann sander at
Sat Nov 2 11:27:55 UTC 2013


Op 2 nov. 2013, om 12:16 heeft Masataka Ohta <mohta at> het volgende geschreven:

> Mark Andrews wrote:
>> A cable modem both accepts DHCP packets (for management of the
>> modem) and passes DHCP packets through to the customer device.
> Even if the CPE does so, which means there is no NAT, the key
> to update rDNS must, naturally, be contained only in DHCP reply
> to the CPE.

You are misunderstanding the technology. Many cable operators offer a cable modem in bridged mode so that the customer can attach his own home-router behind it. Sending keys over a medium shared between multiple customers is not safe.


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