Re: [DNSOP] Fwd: New Version Notification for draft-mekking-dnsop-kasp-00.txt

2014-07-28 Thread Matthijs Mekking
On 07/28/2014 07:55 AM, Jerry Lundström wrote: Hi, On fre, 2014-07-25 at 19:07 +0200, 神明達哉 wrote: I have just one very minor comment at this moment. While the draft says in Section 1.2 as follows: A key and signing policy can be expressed in any format. This document uses XML as

[DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Fernando Gont
Folks, (Apologies if this has been debated to death already). At the last IEPG meeting we presented some results regarding the filtering of packets that employ IPv6 extension headers (please see: http://www.iepg.org/2014-07-20-ietf90/iepg-ietf90-ipv6-ehs-in-the-real-world-v2.0.pdf). The packet

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Stephane Bortzmeyer
On Mon, Jul 28, 2014 at 08:24:59AM -0400, Fernando Gont ferna...@gont.com.ar wrote a message of 43 lines which said: The packet drop rates range from 10% to over 50%, depending on the dataset Annoying. This essentially raises the question of What's the plan for transporting DNS

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Nicholas Weaver
On Jul 28, 2014, at 8:42 AM, Stephane Bortzmeyer bortzme...@nic.fr wrote: Quite a few folks usually argue oh, that's simple: we'll use TCP, There are many good reasons to use TCP but, in that case, I do not see why we need it. First, IPv6 users typically don't use extension headers and,

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Fernando Gont
Hi, Stephane, Thanks so much for your prompt response. Comments in-line... On 07/28/2014 08:42 AM, Stephane Bortzmeyer wrote: This essentially raises the question of What's the plan for transporting DNS queries/responses in IPv6? Why do we need a plan? We serve DNS over IPv6 for now ten

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Fernando Gont
On 07/28/2014 08:48 AM, Nicholas Weaver wrote: There are many good reasons to use TCP but, in that case, I do not see why we need it. First, IPv6 users typically don't use extension headers and, second, if the problem is in IP, why would changing from UDP to TCP work? Because the big

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread David Conrad
Hi, On Jul 28, 2014, at 5:48 AM, Nicholas Weaver nwea...@icsi.berkeley.edu wrote: The IPv6 net has decreed “No, really, FRAGMENTS DO NOT WORK”. This could be a bit of an issue when the DNSSEC root key is rolled. Could someone point me to a writeup and/or data as to how we know the above

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Tony Finch
David Conrad d...@virtualized.org wrote: On Jul 28, 2014, at 5:48 AM, Nicholas Weaver nwea...@icsi.berkeley.edu wrote: The solution is to detect and fallback on EDNS0 MTU to retry at 1400B first (rather than directly down to 512b), and properly handle truncation. How many shipping

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Stephane Bortzmeyer
On Mon, Jul 28, 2014 at 08:52:06AM -0400, Fernando Gont ferna...@gont.com.ar wrote a message of 60 lines which said: Just curious: How do you check that the UDP-based DNS replies actually get to the node that sent the query? 1) Because, otherwise, we would see retransmissions by the client.

Re: [DNSOP] Fwd: New Version Notification for draft-mekking-dnsop-kasp-00.txt

2014-07-28 Thread 神明達哉
At Mon, 28 Jul 2014 10:17:51 +0200, Matthijs Mekking matth...@nlnetlabs.nl wrote: I have just one very minor comment at this moment. While the draft says in Section 1.2 as follows: A key and signing policy can be expressed in any format. This document uses XML as example.

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Casey Deccio
On Mon, Jul 28, 2014 at 10:05 AM, David Conrad d...@virtualized.org wrote: Hi, On Jul 28, 2014, at 5:48 AM, Nicholas Weaver nwea...@icsi.berkeley.edu wrote: The IPv6 net has decreed “No, really, FRAGMENTS DO NOT WORK”. This could be a bit of an issue when the DNSSEC root key is rolled.

Re: [DNSOP] Irony.

2014-07-28 Thread David Conrad
Oops. Mailer problems and obviously misdirected... (intended to be sent to someone with whom I worked on the name collision stuff :)) Sincere apologies. Regards, -drc On Jul 28, 2014, at 3:34 PM, Casey Deccio ca...@deccio.net wrote: I have to admit I have struggled to not respond to Casey

Re: [DNSOP] DNS, fragmentation, and IPv6 extension headers

2014-07-28 Thread Masataka Ohta
Tony Finch wrote: BIND 9.10 changes the first state to do variable-size probing: it will try 512, 1232, 1432, and 4096, starting at the bottom and working up and down depending on what works. The middle numbers come from the minimum IPv6 MTU minus space for headers, and the ethernet MTU