On Thu, 9 Jun 2016, email@example.com wrote:
>> They both have a cert that covers both hosts and they both share at least
>> one IP address. And they speak HTTP/2, so in the rare occasion that this
>> would be a wrong assumption the server can return 421.
> Excellent, then please make it to behave exactly the same way with IPv4 only
> addresses. Why FF not following the same logic if all IP's are strictly
> IPv4 ?
It does. Or perhaps I should say it should, if you indeed can reproduce a
scenario where it doesn't. IP version is not relevant for this context. IP
address overlap is.
> Also, let's add to RFC then that all servers must reply with 421 for domains
> that are not served as FireFox may decide to contact the server regardless
> of IP addresses returned by DNS. Next step will be enforcing the whole world
> to implement it.
A) 421 is already in the RFC.
B) It is not at all "regardless of IP address" since, again, both hosts share
> You can't say that correct functionality of host_2 depends of what 3rd party
> (administrator of host_1) configured on his server ?
If the hosts indeed are that different as your explained scenario, and handled
by differenent entities, why do they share cert and IP addresses?
But more importantly: why do you think responding with a 421 when this happens
is that wrong?
Quating section 9.1.1 from RFC 7540:
A server that does not wish clients to reuse connections can indicate that
it is not authoritative for a request by sending a 421 (Misdirected Request)
status code in response to the request (see Section 9.1.2).
Surely a compliant HTTP/2 server responds this and then the problem is sorted?
> And if you are right and this behaviour is on compliance with RFC, then why
> FF is the ONLY browser behaving that way ?
Apart from the mere fact that HTTP/2 is still a fairly new protocol, Firefox
is leading the path in many ways when it comes to HTTP/2 implementations so
there's no surprise that you'll see some behaviors like this in Firefox first.
I think there are reasons to expect others to act similarly in the future.