I was inspired by onioncat to write a twisted python implementation. Onionvpn doesn't have as many features as onioncat. I've successfully tested that onionvpn and onioncat can talk to each other and play nice. Both onionvpn and onioncat implement a virtual public network. Anyone can send packets to you if they know your onion address or ipv6 address... however injection attacks are unlikely since the attacker cannot know the contents of your traffic without compromising the tor process managing the onion service. I've also tested with mosh; that is, you can use mosh which only works with ipv4 over an ipv4-to-ipv6 tunnel over onionvpn/onioncat. Like this: mosh-client -> udp/ipv4 -> ipv6 -> tun device -> tcp-to-tor -> onion service decodes ipv6 to tun device -> ipv6 -> udp/ipv4 -> mosh-server https://github.com/david415/onionvpn If an onionvpn/onioncat operator were to NAT the onion ipv6 traffic to the Internet then that host essentially becomes a special IPv6 exit node for the tor network. The same can be done for IPv4. Obviously operating such an exit node might be risky due to the potential for abuse... however don't you just love the idea of being about to use low-level network scanners over tor? I wonder if Open Observatory of Network Interference would be interested in this. david
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