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Re: [IPsec] Benjamin Kaduk's Yes on draft-ietf-ipsecme-split-dns-14: (with COMMENT)

Paul Wouters <paul@nohats.ca> Tue, 20 November 2018 14:46 UTC

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Date: Tue, 20 Nov 2018 09:46:08 -0500
From: Paul Wouters <paul@nohats.ca>
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Subject: Re: [IPsec] Benjamin Kaduk's Yes on draft-ietf-ipsecme-split-dns-14: (with COMMENT)
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On Tue, 20 Nov 2018, Michael Richardson wrote:

> Tero Kivinen <kivinen@iki.fi> wrote:
>    > Presentation format includes things like comments, newlines,
>    > whitespace etc.
>
>    > That is the reason I do not like to have presentation format inside
>    > the binary wire formats like IKE. We do not need to do string parsing,
>    > or regex processing in IKE library, but to properly parse presentation
>    > format you need to do that.
>
> +1
> For all the reasons you cited.

Parsing wouldn't happen the way Tero envisions this.

IKE software like have something like an option that reads RRTYPEs, so
that a DNS/VPN administrator can do:

dig ds internal.example.com > /etc/ipsec.d/internal.example.com.ds
dig ns internal.example.com > /etc/ipsec.d/internal.example.com.ns

And put that in a cron job in case they do internal DNSSEC with key
rollovers.

with a config line in the IKE config that loads these entries.

conn example.com
 	modecfgdns=example.com
 	modecfgdns-ns=/etc/ipsec.d/internal.example.com.ns
 	modecfgdns-ds=/etc/ipsec.d/internal.example.com.ds
 	[...]

Paul

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