Companies using public IP space owned by others for internal routing

Grant Taylor gtaylor at
Tue Dec 19 22:03:19 CST 2017

On 12/19/2017 01:55 PM, William Herrin wrote:
> Providers assigning a single /64 or a /128 to an always-on customer are
> doing it wrong. You know who you are.

The cable ISP that I had (prior to moving) assigned a single /64 for the 
outside of the router.  I could also request provider delegation for 
something that I could use internally breaking into multiple /64s.  I 
just don't remember if it was a /56 or /60.

The point being that the outside of the SOHO router and the inside PD 
were two different DHCP processes, both of which needed to happen.

Grant. . . .
unix || die

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