In-Reply-To: <20040922203047.GA16153@xxxxxxxxx> >On Wed, Sep 22, 2004 at 10:06:40AM -1000, Tim Newsham wrote: >> How does this give anonymity? When sending to the server, I must use the >> servers address as a source address. When the server replies to me, it >> must use my address as a source address. > >Yes - you cannot use this in both directions: > > - In the server->client direction, the server can spoof IP source > addresses. > > - In the client->server direction, you need to use multi-level "anonymous > proxying", as used by several current P2P implementations (Gnutella for > queries, Freenet, GNUnet etc). > >The advantage of this is that the available bandwidth can be fully utilized >in the server->client direction, but at the same time the server IP address >can remain unknown to the client. With current P2P systems, server->client >proxying significantly reduces the download bandwidth. > >In practice, implementing this will be fairly complicated because you end >up re-implementing TCP over a highly asymmetric connection. I remember a discussion (in German) about this some time ago, also discussing congestion problems. See http://www.heise.de/newsticker/foren/go.shtml?read=1&msg_id=2617169&forum_id=36041 Babelfish translated: http://babelfish.altavista.com/babelfish/trurl_pagecontent?url=http%3A%2F%2Fwww.heise.de%2Fnewsticker%2Fforen%2Fgo.shtml%3Fread%3D1%26msg_id%3D2617169%26forum_id%3D36041&lp=de_en Enjoy! Hugo
