Date: Wed, 12 Nov 1997 08:44:49 -0700 (MST) From: Charles Mott <cmott@srv.net> To: doconnor@ist.flinders.edu.au Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Dial on demand with dynamic IP Message-ID: <Pine.BSF.3.96.971112083802.1701B-100000@darkstar.home> In-Reply-To: <199711121115.VAA04516@holly.rd.net>
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On successive dialups where different IPs are assigned, it is not possible to maintain a continuous tcp connection from any computer on your network -- either the ppp host or any box which is being NAT'ed by ppp -alias. >From the ISP side of things, if caller-id was available to the network access server (NAS), then it might actually be possible to hack radius so that it preferrentially hands over the same IP address when someone redials within 5 minutes. If there are any ISPs that have caller-id and want to experiment a little, I am willing to write some experimental code here. I think that under periods of light to medium load, it probably would work pretty well. Charles Mott On Wed, 12 Nov 1997, Daniel J. O'Connor wrote: > Hi, > I was wondering if it was possible to get dial on demand working with a > dynamic IP. I realise it would be difficult, and as far as I can tell you'd > _need_ IP aliasing, but how I envisage it working would be as follows. > > Run an app that sends a packet(telnet, mail.. whatever)0 > The PPP process dials up, and then gets the IP it's to use, and then aliases > the packet according to that IP. > Everything works like normal :) > > I think this would be possible with IJPPP but I'm not sure (you'd have to make > sure the aliasing happens at the right time - ie after any dialup event). > > Is it worth a try? Is anyone alreay doing it? :) > > --------------- > Daniel O'Connor > 3rd Year Computer Science at Flinders University > http://www.geocities.com.au/CapeCanaveral/7200 > > > >
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