Without invalidating the reason for your frustration, I am breathing a sigh of 

As a complete aside, in some ways ipv4 is actually more useful to me in my 
work. In a private network I can tell where in the network the traffic is 
coming from. Even on the internet I can tell country, ISP etc. Very useful for 
security ACLs etc. Unless I’m completely mistaken, I don’t believe this is 
easily done in ipv6. 

BTW, a big thank-you to you and all the devs in the OpenVPN project!


> On Apr 1, 2018, at 12:34 PM, Gert Doering <> wrote:
> Hi,
>> On Sun, Apr 01, 2018 at 12:21:53PM -0700, Marvin Adeff wrote:
>> I had not considered the extra work and code required to maintain both 
>> versions. But I get it now. Here is the unfortunate position this puts us in:
> [..]
> Well, that part of my e-mail was a bit of frustration speaking - I've
> been advocating IPv6 for over 20 years now, and while large parts of
> the access networks are offering IPv6 now, other parts are still being
> *built* with IPv4 only, or stubbornly stick to IPv4 only...  thus, double
> work everywhere, not only in OpenVPN, seemingly for a lifetime.
>> So if OpenVPN lost ipv4 support anytime soon, we would be in a world of hurt.
> As far as OpenVPN is concerned, I am not aware of any plans to remove 
> IPv4 support.
> The extra code adds some maintenance and testing effort, but since this
> is all in place now (especially the test setups with "connect over IPv4
> or IPv6" and "send IPv4 and IPv6 packets through the test VPN") it would
> be more work to rip out IPv4 now... :-)
> gert
> -- 
> "If was one thing all people took for granted, was conviction that if you 
> feed honest figures into a computer, honest figures come out. Never doubted 
> it myself till I met a computer with a sense of humor."
>                             Robert A. Heinlein, The Moon is a Harsh Mistress
> Gert Doering - Munich, Germany                   

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