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From: Tom Pusateri <pusateri@bangj.com>
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Subject: Re: [dnssd] WGLC for draft-ietf-dnssd-srp
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I=E2=80=99m breaking this review for draft-ietf-dnssd-srp into two =
sections.

  1. overall architecture
  2. latest revision of the document

I like the new distinction between constrained nodes and regular nodes. =
This helps.


Section 1.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
As we=E2=80=99re moving from the local link with mDNS to internet wide =
service discovery over unicast DNS, I think it is necessary to ensure =
all DNS messages that exit the local link be encrypted.

	a. This document purports to provide =E2=80=9Ca reasonably =
secure mechanism=E2=80=9D that mentions no encryption. Encryption is =
desirable for privacy with both link local and internet wide dns =
messages. While legacy mDNS does not perform encryption, it is possible =
to encrypt link-local announcements as well as internet wide area =
announcements, queries, and responses.

	b. It provides limited authentication through =E2=80=9Cfirst =
come, first serve=E2=80=9D semantics for change modifications but not =
for the the initial registration of any service.

	c. It punts access control to the local administrator based on =
IP address.

	d. It suggests the use of TCP to ensure client address =
verification but then also seems to suggest UDP is ok too for RFC 2136 =
unconstrained nodes.
	e. The use of anycast requires guarantees about network routing =
operations that cannot be detected by SRP servers or clients. SRP =
Updates sent to an anycast address can leak outside the domain through a =
default route and even to another domain=E2=80=99s SRP servers. =
Accepting these over UDP and requiring access control to be configured =
by the same administrators that haven=E2=80=99t set up anycast routing =
correctly seems like a bad idea. Random users can install devices =
configured to use the anycast address out of the box in a network not =
anticipating the deployment of SRP.

	f. describing an architecture where the DNS SRP server is not =
typically on the same link but then requiring it to be so in order for =
the sleep proxy to function as described suggests maybe the SRP =
architecture needs to change. (section 2.6.2)



Section 2.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
document comments

Section 2, paragraph 2:
	There are restrictions placed on the domain name to use =
including RFC 2119 terminology requiring it but there is no =
justification for the imperatives (both in the v4 and v6 case). This =
leaves the reader wondering why.

Section 2, paragraph 3:
	_dnssd-srp._tcp<zone> is defined (add a period before <zone> as =
in 2.3.2). Can there also be a _dnssd-srp-tls._tcp.<zone>?

Section 2, paragraph 4:
	The wording makes it seem like =E2=80=9Cdefault.services.arpa=E2=80=
=9D is defined in RFC 6761

Section 2.1, paragraph 1:
	The update terminology seems overloaded and a bit confusing in =
the document overall. In this particular paragraph, the second sentence =
is confusing with updates in the update that are records.

Section 2.1, paragraph 3:
	the use of =E2=80=9Cboth=E2=80=9D follows a list of items making =
it hard to discern what both refers to. It could be:
		1. the three items in the list (but then both implies 2 =
items not 3)
		2. one or more TXT RRs (but more than 2 also isn=E2=80=99t=
 usually referred to as both)

Section 2.1, last paragraph:
	KEY records are mentioned above but the details of these =
aren=E2=80=99t explained in RFC 6763

Section 2.3, first paragraph:
	=E2=80=9Cit=E2=80=99s possible to do all the work of adding a =
PTR resource record to the PTR RRset on the Service Name if it already =
exists, or creating one if it doesn=E2=80=99t=E2=80=9D. This is =
confusing because each service instance adds a PTR Service Name record =
identically whether the RRset exists or not.

Section 2.3, first and second paragraph:
	First it says =E2=80=9Cit is possible=E2=80=9D and then it says =
=E2=80=9CAn SRP update is therefore implemented=E2=80=9D. But the logic =
between these end caps is not explicit and so it reads awkwardly and =
reader is left wondering what the =E2=80=9Ctherefore=E2=80=9D is there =
for.

Section 2.3, last paragraph:
	The document uses =E2=80=9Cupdate constraints=E2=80=9D but =
should in this case use "update pre-requisites" since it=E2=80=99s =
referring to the way 2136 does things. The second use of constraints =
referring to section 2.4.2 seems correct.

Section 2.3.2:
	This section seems out of place because it is only for testing =
(manual client key installation etc.) and so should be moved to an =
appendix.

Section 2.3.3, paragraph 2:
	=E2=80=9Cas described earlier using _dns-update._udp=E2=80=9D - =
I don=E2=80=99t see any other references to _dns-update._udp. Also, RFC =
2136-compliant servers shouldn=E2=80=99t be restricted to UDP. They can =
support TLS, TCP, or UDP. (_dns-update-tls._tcp, _dns-update._tcp, and =
_dns-update._udp).

	But earlier in 2.0, second to last paragraph, you require TCP to =
prevent off-network spoofing so UDP should not be suggested here.

Section 2.4, last paragraph:
	=E2=80=9Cwhat we describe here improves upon the security of =
mDNS. The goal is not to provide the level of security of a network =
managed by a skilled operator.=E2=80=9D
	In fact, we want to design protocols that provide security, =
privacy, and protect users regardless of the skill of the operators. =
mDNS has a level of protection afforded to it by it=E2=80=99s link local =
nature. Once SRP leaves the link, it is open to a whole new host of =
vulnerabilities and it has to address each of these in a way mDNS never =
had to.

Section 2.4.1.1, third paragraph:
	=E2=80=9Cservice description updates=E2=80=9D - it=E2=80=99s not =
clear here what =E2=80=9Cupdates=E2=80=9D means. This is part of the =
overloading of update in the document.

Section 2.4.1.1, fifth paragraph:
	=E2=80=9Cit makes a claim=E2=80=9D - the paragraph discusses the =
option to use different lease life times and then ends with a =
declarative that it makes a claim that lasts much longer when it fact it =
doesn=E2=80=99t have to. I suggest =E2=80=9Cit could make a claim=E2=80=9D=
.

Section 2.4.2:
	This section contains the meat of the =E2=80=9Cupdate=E2=80=9D =
confusion. Service Discovery update, Service Description update, and =
Host Description update need different terminology to distinguish an =
update message, and SRP update, and these combination of records, that =
combined in a specific way, comprise an SRP update. Maybe Service =
Discovery group or bloc? And we already have resource records and RRsets =
so maybe that terminology could be used in places?

	=E2=80=9CAn update is a Service Discovery update if=E2=80=9D - =
When all of the records required must be in an SRP update, what does =
=E2=80=9Cupdate=E2=80=9D mean here?

	=E2=80=9Cone of more TXT RRset updates=E2=80=9D - can this =
=E2=80=9Cupdates=E2=80=9D be =E2=80=9Cresource records=E2=80=9D?

	=E2=80=9Cthere is a Service Instance Name update in the SRP =
update that updates an SRV RR so that it points to the hostname being =
updated by this update=E2=80=9D - ETOOMANYUPDATES in this sentence

	=E2=80=9CNote that if the definitions of each of these update =
types are followed carefully, this means that many things that look very =
much like SRP updates nevertheless are not=E2=80=9D - It seems that if =
the definitions of each of these updates are followed carefully, you =
would end up with a valid update. Stating that you don=E2=80=99t seems =
to imply that the definitions are not descriptive enough.

	=E2=80=9Cis the same as the KEY record in the update=E2=80=9D - =
again, it=E2=80=99s not clear what update you are referring to. And can =
there be multiple KEY records in the same SRP update? Again, the Service =
Description update vs the Host Description update make this confusing.


	=E2=80=9CThe server MAY add a Reverse Mapping=E2=80=9D - (why is =
Reverse Mapping capitalized?) - Can the client add this? Would this be a =
standard RFC 2136 update since the zone is different?

	=E2=80=9Cmaintenance functionality=E2=80=9D - provide a =
reference in the document to what you mean here

	How do you delete an SRP announced service before the lease =
lifetime of the service name PTR record expires? The rules don=E2=80=99t =
seem to allow that.

Section 2.5:

	If one service is announced via SRP and another service from the =
same host is announced over SRP, how do you make A and AAAA record TTLs =
consistent with both service records?

	=E2=80=9Cwhen adding RRs to an RRset, =E2=80=A6 MUST use the =
same TTL=E2=80=9D - Seems like it would be impossible to achieve this =
with Service PTR records in an RRset. I=E2=80=99m probably not =
understanding it so it may need clarification.


Section 2.6.1, second to last paragraph:
	How does a dual-use server decide an update is an SRP update or =
an RFC 2136 update?


Section 3.2:
	Do you need to specify which key to use for server signature =
validation? Isn=E2=80=99t this already specified outside of SRP?

Section 6.1:
	Throughout the document you reference default.services.arpa and =
then in the IANA you request the services.arpa domain. Where is =
default.services.arpa defined and/or managed? Is it a subdomain or a =
leaf?


Thanks,
Tom





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From: David Schinazi <dschinazi.ietf@gmail.com>
Date: Tue, 7 May 2019 11:22:09 -0700
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Subject: Re: [dnssd] WGLC for draft-ietf-dnssd-push
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Thanks everyone.

Since draft-ietf-dnssd-push already had successfully completed WGLC, and
there was no opposition to the latest changes, we're declaring this WGLC
successful. The document will be submitted to the IESG for publication
shortly.

David

On Mon, Apr 29, 2019 at 8:38 AM Jan Komissar (jkomissa) <jkomissa@cisco.com=
>
wrote:

> This draft looks fine to me.
>
>
>
> Jan.
>
>
>
> *From: *dnssd <dnssd-bounces@ietf.org> on behalf of David Schinazi <
> dschinazi.ietf@gmail.com>
> *Date: *Sunday, April 28, 2019 at 8:07 PM
> *To: *Stuart Cheshire <cheshire=3D40apple.com@dmarc.ietf.org>
> *Cc: *DNSSD <dnssd@ietf.org>
> *Subject: *Re: [dnssd] WGLC for draft-ietf-dnssd-push
>
>
>
> Thank you Stuart.
>
>
>
> To give working group members time to review this diff and your email, we
> are extending this WGLC by a week, until 2019-05-06.
>
>
>
> For future reference, you can use rfcdiff with published draft names in
> the URL:
>
>
> https://tools.ietf.org//rfcdiff?url1=3Ddraft-ietf-dnssd-push-16&url2=3Ddr=
aft-ietf-dnssd-push-19
> <https://tools.ietf.org/rfcdiff?url1=3Ddraft-ietf-dnssd-push-16&url2=3Ddr=
aft-ietf-dnssd-push-19>
>
>
>
> Speaking with WG chair hat off, I personally do not see any problem with
> these changes and support publication.
>
>
>
> Thanks,
>
> David
>
>
>
> On Thu, Apr 25, 2019 at 10:13 PM Stuart Cheshire <cheshire=3D
> 40apple.com@dmarc.ietf.org> wrote:
>
> On 15 Apr 2019, at 10:07, David Schinazi <dschinazi.ietf@gmail.com> wrote=
:
>
> > This email starts another Working Group Last Call (WGLC) for
> draft-ietf-dnssd-push, which will last for two weeks until 2019-04-29. As=
 a
> reminder, this document has already passed WGLC but some slight changes t=
o
> the document warranted another WGLC.
>
> Thank you David.
>
> I have attached an HTML file of the output from <
> https://tools.ietf..org/rfcdiff <https://tools.ietf.org/rfcdiff>>
> comparing draft-ietf-dnssd-push-16 with draft-ietf-dnssd-push-19.
>
> There are a variety of minor textual changes, such as replacing reference=
s
> to draft-ietf-dnsop-session-signal with references to RFC 8490, now that
> this document is published.
>
> In terms of substantive changes, there are two:
>
> 1. DNS Push Notification RECONFIRM
>
> We realized that there is no useful response to a RECONFIRM request. We
> changed RECONFIRM to be a unidirectional DSO message, and that results in
> the deletion of the entire =E2=80=9CRECONFIRM Response=E2=80=9D section. =
This simplifies
> both code, and the document.
>
> 2. DNS Push Notification Updates
>
> Previously, Tom Pusateri and I thought that borrowing the DNS Update
> encoding made sense. That was before DSO (RFC 8490).
>
> When implementing the current specification of DNS Push Notifications ove=
r
> DSO, Ted Lemon discovered that it has no way to express the DNS CLASS of
> changes.
>
> We need to address the problem Ted Lemon discovered, and now that DNS Pus=
h
> uses DSO TLV encoding instead of traditional DNS messages, the incentive =
to
> follow strictly the existing DNS Update encoding has disappeared.
>
> To address this issue, we adopted a new, simpler, way of expressing
> changes.. It=E2=80=99s broadly similar, but simpler.
>
> Please take a look at these changes and let us know if you see any
> problems..
>
> And if you *don=E2=80=99t* see any problems with these changes, please re=
spond
> saying that too.
>
> Stuart Cheshire
>
> _______________________________________________
> dnssd mailing list
> dnssd@ietf.org
> https://www.ietf.org/mailman/listinfo/dnssd
>
>

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<div dir=3D"ltr"><div dir=3D"ltr">Thanks everyone.<div><br></div><div>Since=
 draft-ietf-dnssd-push already had successfully completed WGLC, and<br>ther=
e was no opposition to the latest changes, we&#39;re declaring this WGLC<br=
>successful. The document will be submitted to the IESG for publication<br>=
shortly.<br></div><div><br></div><div>David</div></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 29, 2019=
 at 8:38 AM Jan Komissar (jkomissa) &lt;<a href=3D"mailto:jkomissa@cisco.co=
m" target=3D"_blank">jkomissa@cisco.com</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_8615146724064420011gmail-m_-1734920255958378633WordSe=
ction1">
<p class=3D"MsoNormal">This draft looks fine to me.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Jan.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12pt;color:black">From: =
</span></b><span style=3D"font-size:12pt;color:black">dnssd &lt;<a href=3D"=
mailto:dnssd-bounces@ietf.org" target=3D"_blank">dnssd-bounces@ietf.org</a>=
&gt; on behalf of David Schinazi &lt;<a href=3D"mailto:dschinazi.ietf@gmail=
.com" target=3D"_blank">dschinazi.ietf@gmail.com</a>&gt;<br>
<b>Date: </b>Sunday, April 28, 2019 at 8:07 PM<br>
<b>To: </b>Stuart Cheshire &lt;cheshire=3D<a href=3D"mailto:40apple.com@dma=
rc.ietf.org" target=3D"_blank">40apple.com@dmarc.ietf.org</a>&gt;<br>
<b>Cc: </b>DNSSD &lt;<a href=3D"mailto:dnssd@ietf.org" target=3D"_blank">dn=
ssd@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [dnssd] WGLC for draft-ietf-dnssd-push<u></u><u></u></s=
pan></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">Thank you Stuart. <u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">To give working group members time to review this di=
ff and your email, we are extending this WGLC by a week, until 2019-05-06.<=
u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For future reference, you can use rfcdiff with publi=
shed draft names in the URL:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/rfcdiff?url1=3Ddra=
ft-ietf-dnssd-push-16&amp;url2=3Ddraft-ietf-dnssd-push-19" target=3D"_blank=
">https://tools.ietf.org//rfcdiff?url1=3Ddraft-ietf-dnssd-push-16&amp;url2=
=3Ddraft-ietf-dnssd-push-19</a><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Speaking with WG chair hat off, I personally do not =
see any problem with these changes and support publication.<u></u><u></u></=
p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">David<u></u><u></u></p>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Apr 25, 2019 at 10:13 PM Stuart Cheshire &lt=
;cheshire=3D<a href=3D"mailto:40apple.com@dmarc.ietf.org" target=3D"_blank"=
>40apple.com@dmarc.ietf.org</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4=
.8pt;margin-right:0in">
<p class=3D"MsoNormal">On 15 Apr 2019, at 10:07, David Schinazi &lt;<a href=
=3D"mailto:dschinazi.ietf@gmail.com" target=3D"_blank">dschinazi.ietf@gmail=
.com</a>&gt; wrote:<br>
<br>
&gt; This email starts another Working Group Last Call (WGLC) for draft-iet=
f-dnssd-push, which will last for two weeks until 2019-04-29. As a reminder=
, this document has already passed WGLC but some slight changes to the docu=
ment warranted another WGLC.<br>
<br>
Thank you David.<br>
<br>
I have attached an HTML file of the output from &lt;<a href=3D"https://tool=
s.ietf.org/rfcdiff" target=3D"_blank">https://tools.ietf..org/rfcdiff</a>&g=
t; comparing draft-ietf-dnssd-push-16 with draft-ietf-dnssd-push-19.<br>
<br>
There are a variety of minor textual changes, such as replacing references =
to draft-ietf-dnsop-session-signal with references to RFC 8490, now that th=
is document is published.<br>
<br>
In terms of substantive changes, there are two:<br>
<br>
1. DNS Push Notification RECONFIRM<br>
<br>
We realized that there is no useful response to a RECONFIRM request. We cha=
nged RECONFIRM to be a unidirectional DSO message, and that results in the =
deletion of the entire =E2=80=9CRECONFIRM Response=E2=80=9D section. This s=
implifies both code, and the document.<br>
<br>
2. DNS Push Notification Updates<br>
<br>
Previously, Tom Pusateri and I thought that borrowing the DNS Update encodi=
ng made sense. That was before DSO (RFC 8490).<br>
<br>
When implementing the current specification of DNS Push Notifications over =
DSO, Ted Lemon discovered that it has no way to express the DNS CLASS of ch=
anges.<br>
<br>
We need to address the problem Ted Lemon discovered, and now that DNS Push =
uses DSO TLV encoding instead of traditional DNS messages, the incentive to=
 follow strictly the existing DNS Update encoding has disappeared.<br>
<br>
To address this issue, we adopted a new, simpler, way of expressing changes=
.. It=E2=80=99s broadly similar, but simpler.<br>
<br>
Please take a look at these changes and let us know if you see any problems=
..<br>
<br>
And if you *don=E2=80=99t* see any problems with these changes, please resp=
ond saying that too.<br>
<br>
Stuart Cheshire<br>
<br>
_______________________________________________<br>
dnssd mailing list<br>
<a href=3D"mailto:dnssd@ietf.org" target=3D"_blank">dnssd@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dnssd" target=3D"_blank">h=
ttps://www.ietf.org/mailman/listinfo/dnssd</a><u></u><u></u></p>
</blockquote>
</div>
</div>
</div>

</blockquote></div>

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From: David Schinazi <dschinazi.ietf@gmail.com>
Date: Tue, 7 May 2019 11:27:38 -0700
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Subject: Re: [dnssd] WGLC for draft-ietf-dnssd-mdns-relay
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Hi everyone,

This WGLC has also failed due to lack of support.
We encourage the authors to instigate more discussion of this topic on this
mailing list.

Thanks,
David

On Mon, Apr 15, 2019 at 10:07 AM David Schinazi <dschinazi.ietf@gmail.com>
wrote:

> Hi everyone,
>
> This email starts a Working Group Last Call (WGLC)
> for draft-ietf-dnssd-mdns-relay, which will last for two weeks until
> 2019-04-29. As a reminder, the last WGLC failed due to lack of statements
> of support.
>
> Please indicate support or raise any concerns in response to this email.
>
> Thanks,
> David
>

--000000000000c449580588505f2a
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<div dir=3D"ltr">Hi everyone,<br><div><br></div><div>This WGLC has also fai=
led due to lack of support.</div><div>We encourage the authors to instigate=
 more discussion of this topic on this mailing list.</div><div><br></div><d=
iv>Thanks,</div><div>David</div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 15, 2019 at 10:07 AM David Schi=
nazi &lt;<a href=3D"mailto:dschinazi.ietf@gmail.com">dschinazi.ietf@gmail.c=
om</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
"><div dir=3D"ltr"><div dir=3D"ltr">Hi everyone,<div><br></div><div>This em=
ail starts a Working Group Last Call (WGLC) for=C2=A0draft-ietf-dnssd-mdns-=
relay, which will last for two weeks until 2019-04-29. As a reminder, the l=
ast WGLC failed due to lack of statements of support.</div><div><br></div><=
div>Please indicate support or raise any concerns in response to this email=
.</div><div><br></div><div>Thanks,</div><div>David</div></div></div>
</blockquote></div>

--000000000000c449580588505f2a--


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From: David Schinazi <dschinazi.ietf@gmail.com>
Date: Tue, 7 May 2019 11:27:56 -0700
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Subject: Re: [dnssd] WGLC for draft-ietf-dnssd-srp
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--000000000000da8a1b05885060e4
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Hi everyone,

Since there have been no written statements of support and the one review
raises concerns, this WGLC was not successful.

This document is now back in the "WG Document" stage. We believe the
document can benefit from more discussion before moving it along in IETF
process.

Thanks,
David

On Mon, Apr 15, 2019 at 10:07 AM David Schinazi <dschinazi.ietf@gmail.com>
wrote:

> Hi everyone,
>
> This email starts a Working Group Last Call (WGLC)
> for draft-ietf-dnssd-srp, which will last for two weeks until 2019-04-29.
>
> Please indicate support or raise any concerns in response to this email.
>
> Thanks,
> David
>

--000000000000da8a1b05885060e4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi everyone,<br></div><div><br></div><div>Since there=
 have been no written statements of support and the one review raises conce=
rns, this WGLC was not successful.</div><div><br></div><div>This document i=
s now back in the &quot;WG Document&quot; stage. We believe the document ca=
n benefit from more discussion before moving it along in IETF process.</div=
><div><br></div><div>Thanks,</div><div>David</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 15, 2019 at 1=
0:07 AM David Schinazi &lt;<a href=3D"mailto:dschinazi.ietf@gmail.com" targ=
et=3D"_blank">dschinazi.ietf@gmail.com</a>&gt; wrote:<br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr">Hi =
everyone,<div><br></div><div>This email starts a Working Group Last Call (W=
GLC) for=C2=A0draft-ietf-dnssd-srp, which will last for two weeks until 201=
9-04-29.</div><div><br></div><div>Please indicate support or raise any conc=
erns in response to this email.</div><div><br></div><div>Thanks,</div><div>=
David</div></div></div>
</blockquote></div>

--000000000000da8a1b05885060e4--


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Subject: [dnssd] Publication has been requested for draft-ietf-dnssd-push-19
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David Schinazi has requested publication of draft-ietf-dnssd-push-19 as Proposed Standard on behalf of the DNSSD working group.

Please verify the document's state at https://datatracker.ietf.org/doc/draft-ietf-dnssd-push/


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Reviewer: Liang Xia
Review result: Has Issues

Nit:
1. Section 6.1, s/This connection is made to TCP port 853, the default port for
DNS-over-TLS DNS over TLS [RFC7858]./This connection is made to TCP port 853,
the default port for DNS-over-TLS [RFC7858]. 2. Table 2, RECONFIRM should be
C-U TLV type.

Comments:
1. why are UNSUBSCRIBE and RECONFIRM the client unidirectional message?
2. In UNSUBSCRIBE message, why do you choose to use SUBSCRIBE MESSAGE ID, not
NAME+TYPE+CLASS? 3. In the section of Security Considerations:
    1) you should also mention that TLS provides the anti-replay protection
    service for DNS Push; 2) maybe you need to consider the client
    authentication to achieve policy control and detect illegal client; 3) TLS
    WG are specifying the SNI encryption mechanism, will it influence your TLS
    name authentication?


From nobody Fri May 17 08:59:31 2019
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Thanks for the review.

I can confirm that both nits need fixed.

As far as your comments:
1. UNSUBSCRIBE and RECONFIRM are unidirectional because they are already =
acknowledged by the transport protocol and there is nothing the client =
can do in response to a DNS level Stateful Operations acknowledgement =
from the server.

If an UNSUBSCRIBE fails, it=E2=80=99s because it=E2=80=99s not =
subscribed and the end result either way is that it=E2=80=99s not =
subscribed.

A RECONFIRM may trigger additional queries from the server which may or =
may not result in PUSH notifications but the client has to deal with the =
situation the same until a PUSH notification is received.

2. As far as using the DNS header MESSAGE ID in an UNSUBSCRIBE, this is =
a consequence of not reusing outstanding message IDs over stateful =
operations. This means the server must keep the state of the message id =
and so associating it with the subscription is natural.

Will also address TLS comments.

Thanks,
Tom


> On May 17, 2019, at 3:47 AM, Liang Xia via Datatracker =
<noreply@ietf.org> wrote:
>=20
> Reviewer: Liang Xia
> Review result: Has Issues
>=20
> Nit:
> 1. Section 6.1, s/This connection is made to TCP port 853, the default =
port for
> DNS-over-TLS DNS over TLS [RFC7858]./This connection is made to TCP =
port 853,
> the default port for DNS-over-TLS [RFC7858]. 2. Table 2, RECONFIRM =
should be
> C-U TLV type.
>=20
> Comments:
> 1. why are UNSUBSCRIBE and RECONFIRM the client unidirectional =
message?
> 2. In UNSUBSCRIBE message, why do you choose to use SUBSCRIBE MESSAGE =
ID, not
> NAME+TYPE+CLASS? 3. In the section of Security Considerations:
>    1) you should also mention that TLS provides the anti-replay =
protection
>    service for DNS Push; 2) maybe you need to consider the client
>    authentication to achieve policy control and detect illegal client; =
3) TLS
>    WG are specifying the SNI encryption mechanism, will it influence =
your TLS
>    name authentication?
>=20
> _______________________________________________
> dnssd mailing list
> dnssd@ietf.org
> https://www.ietf.org/mailman/listinfo/dnssd


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DNSSD,
	I=E2=80=99m struggling with the apparent lack of interest in the =
work performed by this WG. The original mandate based on the EDUCAUSE =
request seemed to show that we were working on a problem that needed an =
interoperable solution.

However, as time has gone by, we have seen little feedback from the =
educational community and a general lack of participation from the =
working group.

Several calls for participation have ended in no response and I wonder =
if we=E2=80=99re still solving a problem that people have.

Vendors have introduced work-arounds in switches, access points, and =
even bluetooth pairings.

I think it is worth considering if we=E2=80=99re solving a problem worth =
solving.

Therefore, I am considering suspending my work in this working group and =
am of the opinion that the wg should consider shutting down.

If you object to the WG shutting down, then respond as such and include =
how you=E2=80=99re willing to contribute in the next few months.=20

There is still some interesting security work going on but that may be =
better served in a security working group where there is cryptographic =
expertise.

In a lively WG, we would have feedback from people who have previously =
deployed the technology, vendors who have implemented the new =
technology, and DNS experts that would guide the use of the protocol. We =
would have multiple interoperable implementations and feedback from =
those implementations.

Thanks,
Tom=


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On May 30, 2019, at 8:12 AM, Tom Pusateri <pusateri@bangj.com> wrote:
> If you object to the WG shutting down, then respond as such and =
include how you=E2=80=99re willing to contribute in the next few months.=20=



I do object.   I=E2=80=99m a bit jammed up with pre-WWDC work right now =
to comment at length, but will respond in more detail after WWDC.


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">On =
May 30, 2019, at 8:12 AM, Tom Pusateri &lt;<a =
href=3D"mailto:pusateri@bangj.com" class=3D"">pusateri@bangj.com</a>&gt; =
wrote:<div><blockquote type=3D"cite" class=3D""><div class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); font-family: Menlo-Regular; =
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word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;" class=3D"">If you object =
to the WG shutting down, then respond as such and include how you=E2=80=99=
re willing to contribute in the next few months.<span =
class=3D"Apple-converted-space">&nbsp;</span></span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Menlo-Regular; =
font-size: 14px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""></div></blockquote></div><div class=3D""><br =
class=3D""></div><div class=3D"">I do object. &nbsp; I=E2=80=99m a bit =
jammed up with pre-WWDC work right now to comment at length, but will =
respond in more detail after WWDC.</div><div class=3D""><br =
class=3D""></div></body></html>=

--Apple-Mail=_3470E964-DF4B-4035-9073-56342B72B874--


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To: Ted Lemon <mellon@fugue.com>
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> On May 31, 2019, at 4:07 PM, Ted Lemon <mellon@fugue.com> wrote:
>=20
> On May 30, 2019, at 8:12 AM, Tom Pusateri <pusateri@bangj.com =
<mailto:pusateri@bangj.com>> wrote:
>> If you object to the WG shutting down, then respond as such and =
include how you=E2=80=99re willing to contribute in the next few months.=20=

>=20
>=20
> I do object.   I=E2=80=99m a bit jammed up with pre-WWDC work right =
now to comment at length, but will respond in more detail after WWDC.
>=20

Well, I was hoping you and Stuart objected. But it=E2=80=99s everyone =
else that worries me. Where are the users, vendors, implementors aside =
from the authors?

Tom=

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
May 31, 2019, at 4:07 PM, Ted Lemon &lt;<a =
href=3D"mailto:mellon@fugue.com" class=3D"">mellon@fugue.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; line-break: after-white-space;" class=3D"">On May 30, 2019, at =
8:12 AM, Tom Pusateri &lt;<a href=3D"mailto:pusateri@bangj.com" =
class=3D"">pusateri@bangj.com</a>&gt; wrote:<div class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"caret-color: =
rgb(0, 0, 0); font-family: Menlo-Regular; font-size: 14px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
class=3D"">If you object to the WG shutting down, then respond as such =
and include how you=E2=80=99re willing to contribute in the next few =
months.<span class=3D"Apple-converted-space">&nbsp;</span></span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Menlo-Regular; =
font-size: 14px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;" class=3D""></div></blockquote></div><div class=3D""><br =
class=3D""></div><div class=3D"">I do object. &nbsp; I=E2=80=99m a bit =
jammed up with pre-WWDC work right now to comment at length, but will =
respond in more detail after WWDC.</div><div class=3D""><br =
class=3D""></div></div></div></blockquote></div><br class=3D""><div =
class=3D"">Well, I was hoping you and Stuart objected. But it=E2=80=99s =
everyone else that worries me. Where are the users, vendors, =
implementors aside from the authors?</div><div class=3D""><br =
class=3D""></div><div class=3D"">Tom</div></body></html>=

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From: Ted Lemon <mellon@fugue.com>
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On May 31, 2019, at 1:31 PM, Tom Pusateri <pusateri@bangj.com> wrote:
> Well, I was hoping you and Stuart objected. But it=E2=80=99s everyone =
else that worries me. Where are the users, vendors, implementors aside =
from the authors?

As I said, I will have time to discuss it after the WWDC crunch is over. =
  If it=E2=80=99s okay with you, can we hold off until then?


--Apple-Mail=_E66A3AF5-3825-41F8-B5D5-73F1811EC443
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">On =
May 31, 2019, at 1:31 PM, Tom Pusateri &lt;<a =
href=3D"mailto:pusateri@bangj.com" class=3D"">pusateri@bangj.com</a>&gt; =
wrote:<div><blockquote type=3D"cite" class=3D""><div class=3D""><div =
class=3D"" style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 14px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none;">Well, I was hoping you and Stuart objected. But it=E2=80=99s =
everyone else that worries me. Where are the users, vendors, =
implementors aside from the authors?</div></div></blockquote><br =
class=3D""></div><div>As I said, I will have time to discuss it after =
the WWDC crunch is over. &nbsp; If it=E2=80=99s okay with you, can we =
hold off until then?</div><div><br class=3D""></div></body></html>=

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> On May 30, 2019, at 11:12 AM, Tom Pusateri <pusateri@bangj.com> wrote:
>=20
> DNSSD,
> 	I=E2=80=99m struggling with the apparent lack of interest in the =
work performed by this WG. The original mandate based on the EDUCAUSE =
request seemed to show that we were working on a problem that needed an =
interoperable solution.
>=20
> However, as time has gone by, we have seen little feedback from the =
educational community and a general lack of participation from the =
working group.
>=20
> Several calls for participation have ended in no response and I wonder =
if we=E2=80=99re still solving a problem that people have.
>=20
> Vendors have introduced work-arounds in switches, access points, and =
even bluetooth pairings.
>=20
> I think it is worth considering if we=E2=80=99re solving a problem =
worth solving.
>=20
> Therefore, I am considering suspending my work in this working group =
and am of the opinion that the wg should consider shutting down.
>=20
> If you object to the WG shutting down, then respond as such and =
include how you=E2=80=99re willing to contribute in the next few months.=20=

>=20
> There is still some interesting security work going on but that may be =
better served in a security working group where there is cryptographic =
expertise.
>=20
> In a lively WG, we would have feedback from people who have previously =
deployed the technology, vendors who have implemented the new =
technology, and DNS experts that would guide the use of the protocol. We =
would have multiple interoperable implementations and feedback from =
those implementations.
>=20
> Thanks,
> Tom
> _______________________________________________
> dnssd mailing list
> dnssd@ietf.org
> https://www.ietf.org/mailman/listinfo/dnssd

Tom,=20

I think you are right and with only 2 people interested in the work it =
is time to close the WG=20

Olafur

