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Started by evantkh, January 27, 2015, 06:54:41 AM
Quote from: broquea on January 27, 2015, 09:00:30 AMNot the same protocol, but definitely similar and inverse usage. http://en.wikipedia.org/wiki/4in6I'd be wary of making a tunnel turducken though (native ipv4 + 6in4 over that + 4in6 over 6in4 tunnel). The overhead might make the throughput a Bad Experience.
Quote from: broquea on January 27, 2015, 04:03:11 PMYou can, I simply recommended against it, since the overhead of each tunnel has overhead. 6in4 has 20 bytes, taking 1500 down to 1480. if that goes over pppoe, thats another 8 bytes, taking that 6in4 down to 1472. then if you try and run a 4in6 over that 1472 sized 6in4 tunnel, you have to subtract the overhead for that tunnel, to get your new largest size that can transition that 4in6-6in4 tunnel.If you've got native ipv4, and are using a 6in4 tunnel to access ipv6, why would you tunnel ipv4 over a ipv6 tunnel when you have native? At that point why not run an IPv4 GRE tunnel from your same machine to that far side, and skip making a tunnel-in-tunnel headache with lowered mtu sizes? Or openVPN between sites, and dualstack the ovpn tunnel?
Quote from: broquea on January 27, 2015, 09:26:09 PMuh, no. now think about why.Your IPv6 tunnel is over IPv4. That is a Protocol 41 tunnel.Now you want to tunnel IPv4 over IPV6. That is a whatever-protocol tunnel. it isn't a protocol 41 tunnel.If your IPv6 is over a tunnel, how would you propose to NOT run a 4in6 tunnel over your tunneled IPv6 connection.A sane solution, is terminate the 6in4 tunnel on some VPS somewhere, then set up OpenVPN on that server, to give OpenVPN clients both IPv4/IPv6, and forget you ever thought or considered 4in6.
QuoteActually, is there anyway to make the tunnel work for IPv4 also?
Quote from: broquea on January 28, 2015, 12:39:30 AMQuoteActually, is there anyway to make the tunnel work for IPv4 also?the HE tunnel? no, not at all.
Quote from: broquea on January 28, 2015, 12:47:12 AMthen sure, use something like openvpn as the tunnel mechanism, and run that as dual-stack.
Quote from: broquea on January 28, 2015, 04:23:30 AMnope. 2 stacks, single tunnel source/method? dual-stacked VPN solution. get crackin!