Re: [DNSOP] A practical solution for ISP-level support of the reverse DNS tree for IPv6

2009-09-07 Thread Ted Lemon
On Sep 3, 2009, at 6:37 PM, Mark Andrews wrote: First what DoS that doesn't exist today? Updates already get sent to the ISP's {IN-ADDR,IP6}.ARPA servers. If you do prefix delegation, you're delegating typically 64 bits of address space. If you allow your customer to do arbitrary DNS

Re: [DNSOP] A practical solution for ISP-level support of the reverse DNS tree for IPv6

2009-09-07 Thread Mark Andrews
In message 63fd8b00-b74f-465e-95c8-129a69f52...@nominum.com, Ted Lemon writes : On Sep 3, 2009, at 6:37 PM, Mark Andrews wrote: First what DoS that doesn't exist today? Updates already get sent to the ISP's {IN-ADDR,IP6}.ARPA servers. If you do prefix delegation, you're delegating

Re: [DNSOP] A practical solution for ISP-level support of the reverse DNS tree for IPv6

2009-09-07 Thread Ted Lemon
On Sep 7, 2009, at 6:52 PM, Mark Andrews wrote: /56 should be typical for homes /48 should be typical for businesses I don't think this is germane to the discussion. My point in mentioning /64 was simply that if you go narrower than that, important things break, so it's a

Re: [DNSOP] A practical solution for ISP-level support of the reverse DNS tree for IPv6

2009-09-07 Thread Mark Andrews
In message f4529f1d-1a2f-48be-bf7c-e06419c07...@nominum.com, Ted Lemon writes : On Sep 7, 2009, at 6:52 PM, Mark Andrews wrote: /56 should be typical for homes /48 should be typical for businesses I don't think this is germane to the discussion. My point in mentioning /64 was

Re: [DNSOP] A practical solution for ISP-level support of the reverse DNS tree for IPv6

2009-09-03 Thread Mark Andrews
In message e2dcddf0-5aba-4bb0-aaff-0113cea4a...@nominum.com, Ted Lemon writes : On Sep 3, 2009, at 11:58 AM, Lee Howard wrote: Education needed: how do you tell a residential user what server will accept their dynamic PTR updates? I think this is an unnecessarily difficult answer.