Re: WGLC: draft-ietf-sip-connect-reuse-08.txt

Interestingly, doing the DNS lookup for blue.com, and
recognizing that 
you already have a connection from that address would work
in this case.

	Paul

Vijay K. Gurbani wrote:
> Paul Kyzivat wrote:
>>> Unfortunately, people are using it and as such
something ought to
>>> be said about it in the draft.  I agree that as
the less said, the
>>> better.  I also agree that putting the
"alias" parameter in the
>>> Via request for TCP.
>>
>> There seems to be something wrong with the last
sentence. Did you 
>> forget a word or two?
> 
> Yes, sorry; I meant to say that "I also agree that
putting the "alias"
> parameter in the Via request for TCP is not a good
idea."
> 
>>> This still does not solve the problem of
reusing TCP connections
>>> for virtual servers; i.e., B does not know that
that A's physical
>>> IP address is being used by multiple virtual
domains. 
>>
>> I don't understand what point you are making here.
> 
> Consider named-based virtual hosting in SIP, where the
same IP
> address supports multiple domains.  red.com and
blue.com are hosted
> on a physical server that uses one IP address.  Now,
when red.com
> makes a TCP connection to another domain -- example.com
-- then
> example.com may want to use this TCP connection to send
requests
> to blue.com (because blue.com's IP address matches
red.com's).
> 
> Same problem we had in TLS, except the way we solved it
in TLS
> was to associate the identity picked up from the
certificate with
> the connection.
> 
> Thanks,
> 
> - vijay


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Paul Kyzivat wrote:
> Interestingly, doing the DNS lookup for blue.com, and
recognizing that 
> you already have a connection from that address would
work in this case.

Precisely, and therein lies the problem, right? 
example.com
is using one connection to the virtual server to deliver
requests
destined for another domain on the same virtual server.

Or are we talking past each other?

- vijay
-- 
Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
2701 Lucent Lane, Rm. 9F-546, Lisle, Illinois 60532 (USA)
Email: vkg{alcatel-lucent.com,bell-labs.com,acm.org}
WWW:   http://www.al
catel-lucent.com/bell-labs


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