Hi, 

On Mon, Nov 16, 2015 at 01:19:08PM +0100, Piotr Strzyzewski wrote: 
> On Mon, Nov 16, 2015 at 12:55:57PM +0100, Jen Linkova wrote: 
> > Please use ripemtg-nat64 SSID. Please let us know if smth goes wrong. 
> 
> OpenVPN 2.3.8 from Win 8.1 Pro 64bit (if that matters) to v4 only host 
> don't want to connect. 

Yeah, sorry for that. OpenVPN 2.3 is not proper dual-stacked, more 
"doubly single-stacked" - so it works if you do "--proto udp6" to 
make it ask for an AAAA record, but it will not try both protocols 
automatically. 

OpenVPN 2.4 (which is "git master and daily snapshots" now) will do 
the right thing - getaddrinfo() and try all v4 and v6 addresses returned. 

Snapshots are here: 

http://build.openvpn.net/downloads/snapshots/ 

(and the general quality of recent snapshots is good enough you can use 
them fairly safely)