Hi Steffan

Thanks for taking the time to explain to me the salient features of a good 
encryption/decryption VPN.

> > tls-client
> 
> This means you're using TLS for forward secrecy, and are refreshing you
> data channel keys (at least) hourly.  That's good.

Is "forward secrecy" the same as "Perfect Forward Secrecy"? I have come across 
the latter on some websites.

How can you tell the data channel keys are refreshed at regular intervals?

> You're using TLS-auth to protect against mitm attacks on your TLS
> connection, which is very good.  key-directing 1 means you are using
> different keys for client-server and server-client traffic, which is
> good too.

Should I be worried if some VPN providers do NOT use "tls-auth" or 
"key-directing 1"? The reason for asking is I have been using commercial VPN 
providers for many years and some of them do NOT provide "tls-auth" or 
"key-directing 1".

 
> > Wed Dec 7 08:27:57 2016 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 
> > ECDHE-RSA-AES256-GCM-SHA384, 4096 bit RSA
>

You said that my VPN provider is using 4096 bit RSA based on the above 
statement. What about "ECDHE-RSA-AES256-GCM-SHA384"?

> 
> So, all in all, very decent setup.  Once you move to OpenVPN 2.4 (which
> is nearing release), you switch from --tls-auth to --tls-crypt for some
> "poor-man's" post-quantum security, and use AES-256-GCM for more
> efficiency on the data channel.

Could you explain in greater detail your statement "use AES-256-GCM for more 
efficiency on the data channel"?

My VPN provider is already using AES-256-GCM but its technical staff had told 
me that I needed to use their version of OpenVPN software because the 
community-version 2.3.14 does not offer AES-256-GCM. To be safe, I declined 
their offer.

Regards.

Sebastian

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