Thanks Lonnie. I suspect that this is not the problem but I cant understand why 
I need to restart the server before it works.

Regards
Michael Knill

-----Original Message-----
From: Lonnie Abelbeck <li...@lonnie.abelbeck.com>
Reply-To: AstLinux List <astlinux-users@lists.sourceforge.net>
Date: Monday, 11 September 2017 at 1:24 pm
To: AstLinux List <astlinux-users@lists.sourceforge.net>
Subject: Re: [Astlinux-users] OpenVPN on Yealink phones not very reliable

Michael,

You could try
-- OpenVPN Server --
Raw Commands: duplicate-cn
--
and see if that helps.  But you need to understand if you really need "multiple 
clients using the same certificate or username to concurrently connect".

Is there a OpenVPN client you forgot about ?  Are any sharing a username ?

I can generate the "duplicate-cn" log myself by connecting, disconnect and 
re-connecting using the same client.  But it all works, no issues.

Lonnie


On Sep 10, 2017, at 9:22 PM, Michael Knill <michael.kn...@ipcsolutions.com.au> 
wrote:

> Ah I did remember seeing something in the logs about this:
> Mon Sep 11 11:26:06 2017 us=913475 MULTI: new connection by client 
> '001565F4634C' will cause previous active sessions by this client to be 
> dropped.  Remember to use the --duplicate-cn option if you want multiple 
> clients using the same certificate or username to concurrently connect.
> 
> Is this a complaint? Should I just enable it anyway? 
> I assume I add it to the RAW Commands?
> 
> Regards
> Michael Knill
> 
> -----Original Message-----
> From: Lonnie Abelbeck <li...@lonnie.abelbeck.com>
> Reply-To: AstLinux List <astlinux-users@lists.sourceforge.net>
> Date: Monday, 11 September 2017 at 11:52 am
> To: AstLinux List <astlinux-users@lists.sourceforge.net>
> Subject: Re: [Astlinux-users] OpenVPN on Yealink phones not very reliable
> 
> Michael,
> 
> Judging from your error log the Yealink's client CN (Common Name) did not 
> match any of the allowed (non-checked) Clients in the server.  As long as you 
> are certain the Yealink client cert is good.
> 
> You are not "sharing" a client certificate are you ?  If you are do you have 
> the "duplicate-cn" raw command added ?  From the OpenVPN docs ...
> 
> --duplicate-cn
> Allow multiple clients with the same common name to concurrently connect. In 
> the absence of this option, OpenVPN will disconnect a client instance upon 
> connection of a new client having the same common name.
> 
> Sounds a little like what you are describing.
> 
> else ...
> 
> Is your Yealink running the latest (or recent) firmware ?
> 
> AstLinux is using the latest OpenVPN series 2.4.x.
> 
> You can increase the Log Verbosity: to High on the server and see if that 
> helps to find a clue.
> 
> Lonnie
> 
> 
> On Sep 10, 2017, at 8:08 PM, Michael Knill 
> <michael.kn...@ipcsolutions.com.au> wrote:
> 
>> Hi Lonnie
>> 
>> Do you mean Client Name? Yes I do have one disabled if so but it is not the 
>> one I was having problems with.
>> 
>> After testing I can now confirm that this issue occurs when I configure up a 
>> new phone and it goes away (and VPN establishes) when I restart the OpenVPN 
>> server.
>> Can you think why this could be happening?
>> 
>> Regards
>> Michael Knill
>> 
>> -----Original Message-----
>> From: Lonnie Abelbeck <li...@lonnie.abelbeck.com>
>> Reply-To: AstLinux List <astlinux-users@lists.sourceforge.net>
>> Date: Monday, 11 September 2017 at 9:55 am
>> To: AstLinux List <astlinux-users@lists.sourceforge.net>
>> Subject: Re: [Astlinux-users] OpenVPN on Yealink phones not very reliable
>> 
>> Michael,
>> 
>> On your OpenVPN Server configuration (at the bottom), you must have at least 
>> one CommonName disabled. 
>> 
>> Client Certificates and Keys: -> Disabled checked    (correct ?)
>> 
>> This will define the variable OVPN_VALIDCLIENTS and is checked with the 
>> /usr/sbin/openvpn-tls-verify script
>> 
>> Is your Yealink using one of the "Disabled" CommonNames ?
>> 
>> Lonnie
>> 
>> 
>> On Sep 10, 2017, at 6:34 PM, Michael Knill 
>> <michael.kn...@ipcsolutions.com.au> wrote:
>> 
>>> I am having some issues with setting up OpenVPN on my Yealink phones. It 
>>> used to be easy to set up but now it's a bit flakey.
>>> Once its up it seems to be fine but getting it to that stage is an issue.
>>> 
>>> I noticed that I am getting these in the logs:
>>> Mon Sep 11 08:05:39 2017 us=888912 115.187.181.61:36531 WARNING: Failed 
>>> running command (--tls-verify script): external program exited with error 
>>> status: 1
>>> 
>>> Im not sure what they mean? What could the problem be?
>>> 
>>> Regards
>>> Michael Knill
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> 
> 
> ------------------------------------------------------------------------------
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> 
> 
> ------------------------------------------------------------------------------
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