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Re: [TLS] TCP Keep Alive Question: draft-ietf-tls-tls13-11

Watson Ladd <watsonbladd@gmail.com> Mon, 04 January 2016 15:52 UTC

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Date: Mon, 04 Jan 2016 07:52:17 -0800
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From: Watson Ladd <watsonbladd@gmail.com>
To: nalini.elkins@insidethestack.com
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Subject: Re: [TLS] TCP Keep Alive Question: draft-ietf-tls-tls13-11
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On Mon, Jan 4, 2016 at 7:45 AM,  <nalini.elkins@insidethestack.com> wrote:
> Hello All,
>
> Please excuse if this topic has been previously discussed.  I have a question about TCP Keep Alives.
>
> Section 5 of draft-ietf-tls-tls13-11 reads:
>
> "Three protocols that use the TLS Record Protocol are described in this document: the TLS Handshake Protocol, the Alert Protocol, and the application data protocol."
>
> Then continues with:
>
> "Implementations MUST NOT send record types not defined in this document unless negotiated by some extension.  If a TLS implementation receives an unexpected record type, it MUST send an
> "unexpected_message" alert."
>
> In the wild today, I see many TLS connections which use TCP Keep Alive (NOT TLS Heartbeat).   I take it that this will not work going forth?

TCP Keep Alive is invisible to the TLS connection.

>  Thanks,
>
> Nalini Elkins
> Inside Products, Inc.
> www.insidethestack.com
> (831) 659-8360
>
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