Yavipind is a secure tunnel (2 peers securely
forwarding packets toward each other). It forwards
any kind of packet (IPv4, IPv6, or other) sent
over the virtual point-to-point device (e.g.,
tun0). It runs in Linux userspace.
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Support for forward secrecy was added. Even if an attacker cracks the box, he
won't be able to read traffic older than a specified delay (default 10
minutes). Other minor modifications were also made.