On Monday 15 September 2008, 7v5w7go9ub0o wrote: > Bernhard Fischer wrote: > > On Monday 15 September 2008, Sven Anderson wrote: > >> Am 15.09.2008 um 16:16 schrieb Bernhard Fischer: > >>> We have a new version of OnionCat ready which is now capable of > >>> IPv4-forwarding. > >>> > >>> Read http://www.abenteuerland.at/onioncat/ for further instructions > >>> on how to > >>> use OnionCat and IP. > >> > >> Does it really work in an acceptable way? I ask because "TCP Over TCP > >> Is A Bad Idea". I would expect it to have an awful performance. > >> > >>  http://sites.inka.de/~bigred/devel/tcp-tcp.html > >> > >> > >> Regards, > >> > >> Sven > > > > What somebody would define as "acceptable" may be different but basically > > your concern about it is right. > > > > TCP over TCP is an issue which has some kind of "rubber-band" effects on > > the packet transmission but that's a problem that share all kinds of > > VPNs. Hopefully TOR will work with UDP eventually because in respect to > > performance this would give lower latencies in my opinion and would also > > make OnionCat more powerful. > > > > Specifically with TOR and OnionCat the rubber-band effect can even be > > observed when sending pings over OnionCat (and that's ICMP over TCP ;). > > I'm not sure but I think that's because of the numerous concatenated TCP > > sessions that TOR circuits are built of. > > > > But the real biggest problem currently is the bad performance of hidden > > services in general which overlays all other difficulties. > > > > The advantage of OnionCat is its IP-transparency and together with TOR it > > is location hidden. If someone wants or needs to use hidden services he > > will also use OnionCat, there's not really a difference in performace. > > > > Bernhard > > Is there a performance difference between IPv4 and IPv6 (TCP over TCP)? > I'd presume none; and I'd also presume that a UDP vpn would work fine. > > (Thanks for developing OnionCat!) No, there's no difference. It's more or less the same code. As I wrote before UDP would perform better but I have no influence on that -- TOR is based on TCP. Bernhard
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