[dns-operations] Link-local IP addresses for a resolver?

Paul Ebersman list-dns-operations at dragon.net
Wed Sep 25 05:34:38 UTC 2019

ebersman> No need to shout... And the same could be said of RFC 1918 but
ebersman> ISPs have used that for thousands of homes, crossing thousands
ebersman> of CPEs. Not the best choice and not your choice but it does
ebersman> work for some folks.

marka> Advertising RFC 1918 address as DNS servers by the ISP is also
marka> wrong as the ISP has zero knowledge of which addresses are in use
marka> by the customer and is actually prohibited by RFC1918 as they are
marka> being advertised outside of the site.  It doesn't mean that
marka> there are not ISP's that do that but it isn't expected to
marka> work.

Comcast pushed for IPv6 to avoid this but was up to a 3rd round use of
all of 10.x.x.x before that happened. So it can work and even scale,
even if it's not optimal.

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