[cabfpub] BR "corrections" ballot

Peter Bowen pzb at amzn.com
Mon Mar 21 13:08:36 UTC 2016

> On Mar 21, 2016, at 4:39 AM, Gervase Markham <gerv at mozilla.org> wrote:
> On 21/03/16 11:23, Rob Stradling wrote:
>>> Are the things we put in certificates hostnames? Given that SSL is for
>>> connecting to internet hosts, it would seem to me that they are. Clue me
>>> in by explaining what I'm missing.
>> "You've entered a special hell. It is dark and scary. You are likely to
>> be eaten by a grue."
>> https://www.mail-archive.com/dev-security-policy@lists.mozilla.org/msg02548.html
> Can someone give me a concrete example of why someone would want an _ in
> a hostname in a cert? An all-Microsoft shop using it for an internal
> name which nevertheless was an FQDN? my_server.corp.fooco.com?

_ is allowed at the DNS protocol level, so it works in many cases.  See the following (pulled from CT logs):


All of these have public A records with what appear to be public IPs.  Given this, they presumably work with many TLS clients.


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