Re: [imap5] Beep

Tony Finch <dot@dotat.at> Thu, 10 May 2012 16:22 UTC

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Date: Thu, 10 May 2012 17:22:20 +0100
From: Tony Finch <dot@dotat.at>
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Cc: "Discussion on drastically slimming-down IMAP." <imap5@ietf.org>
Subject: Re: [imap5] Beep
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Dave Crocker <dcrocker@gmail.com> wrote:
>
>    Multiple simultaneous TCP connections are highly problematic.
>    Especially for new protocols.
>
> The real world of today's Internet makes it difficult to ensure proper
> operation through firewalls and application gateways.

Well they aren't great for congestion control and window sizing, but
middleboxes should only be a problem if you are doing FTP-style layering
violations. So concurrent connections are normal for HTTP and IMAP and
SMTP etc. and work OK for other protocols. After all, the network can't
tell the difference between one user's concurrent connections and multiple
concurrent users.

> It would be very nice to fix this underlying problem, but until it's fixed,
> then a new application that uses new TCP ports is not likely to succeed.

Everything over port 443.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
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