Hi, a few months ago there was a patch on the openvpn-devel mailinglist that introduced UDP/IPv6-transport for VPNs. Unfortunately it was too late for inclusion in 2.0 tree ... Original patch at: http://www.irrigacion.gov.ar/juanjo/openvpn/openvpn-2.0_beta20-udp6-jjo-v0.2.2.patch.gz Rediffed from current OpenVPN 2.0rc21 (fixed two rejects): http://users.birkenwald.de/~berni/temp/openvpn-2.0_rc21_udp6_jjo-v0.2.2.patch.gz You need to run the autotools-suite to generate a new configure-script (and probably some more). I did this without any knowledge about it and probably did it wrong, but people were successful to compile it with this patch Rediffed from OpenVPN 2.0rc21 with autotools ran: http://users.birkenwald.de/~berni/temp/openvpn-2.0_rc21_udp6_jjo-v0.2.2-autotools.patch.gz configure, make, make install is enough, then openvpn --proto udp6 --remote <ipv6addr> + your remaining options and you're set Caveats I found so far: * Does not compile on FreeBSD (I only tried on Linux) * You cannot do any route-related things in your config-file/command-line arguments as OpenVPN exits immediately with "assertion failed". * I'm not sure, but it seems PMTUD is broken or only partially working, when having stupid problems with your passing traffic you might need --fragment My VPN connection into the office moved to that and I downloaded something with bittorrent this night via that tunnel, worked flawless. UDPv6 link local (bound): [AF_INET6][undef]:5002 UDPv6 link remote: [AF_INET6]2001:638:100::xxx Peer Connection Initiated with [AF_INET6]2001:638:100::xxx Initialization Sequence Completed Happy compiling :-) BTW, OpenVPN homepage is at http://openvpn.sf.net