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Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Ted Lemon <mellon@fugue.com> Wed, 06 January 2021 18:04 UTC

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From: Ted Lemon <mellon@fugue.com>
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Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
Date: Wed, 06 Jan 2021 13:04:30 -0500
In-Reply-To: <12491.1609955331@localhost>
Cc: Fernando Gont <fgont@si6networks.com>, IPv6 Operations <v6ops@ietf.org>, ipv6@ietf.org, Gert Doering <gert@space.net>
To: Michael Richardson <mcr+ietf@sandelman.ca>
References: <160989494094.6024.7402128068704112703@ietfa.amsl.com> <6fe3a45e-de65-9f88-808d-ea7e2abdcd16@si6networks.com> <m1kx98E-0000EhC@stereo.hq.phicoh.net> <b53b5d62-0334-f791-f56a-f2122767ecdb@si6networks.com> <m1kxAVC-0000KhC@stereo.hq.phicoh.net> <c236e635-518b-fb51-5024-901ec4677c5d@si6networks.com> <20210106162652.GX13005@Space.Net> <1ddf8850-a8cb-53a7-31bc-7433d5a984f2@si6networks.com> <1089BC1B-A8E6-4BF5-BB3E-FD440181DB56@fugue.com> <12491.1609955331@localhost>
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On Jan 6, 2021, at 12:48 PM, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
> There are potentially many GUA (2000::/3) addresses that could be in DNS,
> which would not work for some originators due to ACLs, and yet a different
> entry might work just fine.  Why would ULA be any different?

The usual case here would be through a VPN; in that case the VPN will specify some set of domains that should be resolved through the VPN’s name servers. You really don’t want the ULA advertised globally.

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