Re: Underscore domains?

2018-12-29 Thread Matt Palmer via dev-security-policy
On Sat, Dec 29, 2018 at 02:40:10PM -0800, Lewis Resmond via dev-security-policy 
wrote:
> I am not 100% sure, but I have read that underscores can exist in domain 
> names:
> https://stackoverflow.com/questions/2180465/can-domain-name-subdomains-have-an-underscore-in-it

Correct, but irrelevant for the purposes of this discussion.

> In another thread of this newsgroup, I saw a list of certificates to be
> revoked because of the underscore issue.  And they had underscore domain
> names in it, either in CN or DNS-Names.

Correct.

> So, I wonder, what's the whole forbit-underscore-certificates about?  If
> there are domains out there with underscores, why do you want exclude them
> from being able to use TLS?

Because a TLS client doesn't identify the endpoint with which to establish a
connection by resolving a domain name, it does so by resolving a host name,
which is a different beast, and which has different rules around what
characters are valid -- rules which happen to exclude underscores from the
list of permitted characters.

- Matt

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Re: Underscore domains?

2018-12-29 Thread Lewis Resmond via dev-security-policy
I am not 100% sure, but I have read that underscores can exist in domain names:
https://stackoverflow.com/questions/2180465/can-domain-name-subdomains-have-an-underscore-in-it

In another thread of this newsgroup, I saw a list of certificates to be revoked 
because of the underscore issue. And they had underscore domain names in it, 
either in CN or DNS-Names.

So, I wonder, what's the whole forbit-underscore-certificates about? If there 
are domains out there with underscores, why do you want exclude them from being 
able to use TLS?


Am Samstag, 22. Dezember 2018 03:46:01 UTC+1 schrieb Matt Palmer:
> On Fri, Dec 21, 2018 at 06:14:19PM -0800, Lewis Resmond via 
> dev-security-policy wrote:
> > I have read the debate about the underscores and I understand that they 
> > were never intended in the RFC.
> > But I wonder, does it now mean that people who have a domain name with 
> > underscore will never be able to receive a certificate again?
> 
> There are registered domains -- as in, actual eTLD+1 names -- that have
> underscores in them?
> 
> - Matt

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Re: Underscore domains?

2018-12-21 Thread Matt Palmer via dev-security-policy
On Fri, Dec 21, 2018 at 06:14:19PM -0800, Lewis Resmond via dev-security-policy 
wrote:
> I have read the debate about the underscores and I understand that they were 
> never intended in the RFC.
> But I wonder, does it now mean that people who have a domain name with 
> underscore will never be able to receive a certificate again?

There are registered domains -- as in, actual eTLD+1 names -- that have
underscores in them?

- Matt

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Underscore domains?

2018-12-21 Thread Lewis Resmond via dev-security-policy
Hello,

I have read the debate about the underscores and I understand that they were 
never intended in the RFC.
But I wonder, does it now mean that people who have a domain name with 
underscore will never be able to receive a certificate again?

I'm just being curious. 
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