> From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf
> Of Kurt Roeckx
> Sent: Monday, November 30, 2015 18:38
> To: openssl-users@openssl.org
> Subject: Re: [openssl-users] long (~2.5 minute) delay in TLS handshake
> 
> On Mon, Nov 30, 2015 at 10:46:45PM +0000, Michael Wojcik wrote:
> > I'm curious if anyone has seen anything like this before.
> >
> > We have a situation at one customer site. They see it happen every few
> days. No one else has reported it, and we can't reproduce it.
> 
> Have you considered that this might be a path MTU discovery issue
> and that the TCP layer is just resending the (too large) packet
> without it reaching the other side?

Interesting suggestion, but the trace was taken on the server, and it's 
definitely not resending. Just sitting there, as far as this one conversation 
is concerned. Existing conversations from other clients continue with no 
problems. It acks the ClientHello, then 2.5 minutes later sends the 
ServerHello, which the client responds to with an RST (because it's long since 
gone away).

This same client connects successfully about 5 minutes later, with no unusual 
delays.

Pretty odd.

-- 
Michael Wojcik
Technology Specialist, Micro Focus

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