On 04/08/2014 11:08 PM, Chris Hill wrote:
> SSH and SSL/TLS are simply different protocols (doh). They may share some
> similar underlying crypto implementations, but as of their respective RFCs,
> they are just different protocols. The TLS Heartbeat TLS extension would
> not apply to SSH. 

The above is correct.

> SSH "may" have its own way to keep alive, but that would
> be a different implementation altogether.

SSH does indeed have its own keepalive.  Search for ServerAlive in
ssh_config(5) and ClientAlive in sshd_config(5) if you want details.  It
is an entirely different mechanism from (D)TLS heartbeat.

hope this helps,

        --dkg

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