On Wed, Jun 21, 2023 at 07:46:01PM +0000, Salz, Rich wrote:

> I have made the other changes, just seeking clarification on one point.
> 
> >> 6.4. Matching an IP Address Portion
> >> This document does not specify how an SRV-ID reference identity can include
> >> an IP address.
> 
> > I think SRV-ID clearly says it's just DNS name, so the presented identifier
> > cannot match an IP address. I think this section should clearly say that IP
> > addresses cannot match SRV-ID.
> 
> I am confused, because I thought an IP address *was* a DNS name.

No, IP addresses are not DNS names.  And IP address SANs are octet
strings, 4 bytes for IPv4 and 16 bytes for IPv6.

There is a mapping of IPv4 and IPv6 addresses to reversed dotted quads
for reverse resolution.  Examples:

    1.0.0.127.in-addr.arpa. IN PTR ?
    1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 
IN PTR ?

But in all other ways IP addresses are definitely NOT domain names.

-- 
    Viktor.

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