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, 6 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>
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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.